{"title":"JL Audio RD Amplifiers","description":"\u003cp\u003eJL Audio RD amplifiers are sleek, powerful Class D amps packed with value, from monoblock subwoofer amps to 5 and 6 channel models. Browse all \u003ca href=\"\/collections\/jl-audio-amplifiers\"\u003eJL Audio amplifiers\u003c\/a\u003e.\u003c\/p\u003e","products":[{"product_id":"jl-audio-rd400-4-full-range-class-d-4-channel-car-speaker-amp-amplifier-400w-rms","title":"JL Audio RD400\/4 Full Range Class D 4 Channel Car Speaker Amp Amplifier 400w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD400\/4 is an ultra-compact 4-channel Class D full-range car amplifier delivering 100W x 4 at 2 ohms or 75W x 4 at 4 ohms. It suits anyone upgrading door speakers or a full front and rear system who wants clean power in a small chassis, with bridging for 3-channel or 200W x 2 operation.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 4, Class D full-range (NexD switching technology)\u003c\/li\u003e\n\u003cli\u003eRMS power at 14.4V: 75W x 4 at 4 ohms, 100W x 4 at 2 ohms\u003c\/li\u003e\n\u003cli\u003eBridged: 200W x 2 at 4 ohms\u003c\/li\u003e\n\u003cli\u003eFrequency response: 12Hz - 22kHz (+0, -1dB)\u003c\/li\u003e\n\u003cli\u003eFilters: high or low-pass 12dB\/octave per channel pair, 50-500Hz, defeatable\u003c\/li\u003e\n\u003cli\u003eInput voltage range: switchable 200mV - 2V RMS (low) to 800mV - 8V RMS (high)\u003c\/li\u003e\n\u003cli\u003eFuse rating: 40A; minimum power\/ground wire 4 AWG\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRD400\/4: 4-channel Class D full-range amplifier, 400 W\u003c\/h2\u003e\n\u003ch3\u003e100 W x 4 at 2 ohms \/ 75 W x 4 at 4 ohms, 14.4V\u003c\/h3\u003e\n\u003cp\u003eUtilising JL Audio's exclusive NexD high-speed switching technologies, the ultra-compact RD400\/4 amplifier is engineered to deliver loads of audio output power, with incredible efficiency and low distortion. Don't let its modern styling and small size fool you though: this little powerhouse churns out 100 watts of crystal-clear audio from each of its four channels into 2 ohms (14.4V, 1% THD) and is fully bridgeable, so it can be used as a 3-channel amplifier, or as a 2-channel amplifier producing 200W x 2 into 4 ohms.\u003c\/p\u003e\n\u003cp\u003eFor your convenience, the RD400\/4's controls can be found on top of the amplifier, beneath a protective cover, with all connections located along one side of its chassis. Studio-grade signal processing features include high or low-pass 12 dB\/octave filters (defeatable) for each channel pair, with continuously variable frequency selection from 50-500 Hz, and dual-range, differential-balanced inputs capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard equipment, along with input type switches for bridging of stereo output channels without needing to use Y-adaptors.\u003c\/p\u003e\n\u003cp\u003eOnboard LED clipping indicators are also included with your RD400\/4. This feature lets you set your amplifier's input sensitivity quickly and accurately, with no special equipment needed. You'll also find a set of preamp outputs, so you can pass signals to another amplifier almost effortlessly. The RD400\/4 features a durable, black powder-coated finish and a top-mounted, dual-colour LED light strip that reports the overall status and condition.\u003c\/p\u003e\n\u003ch2\u003eNexD switching technology\u003c\/h2\u003e\n\u003cp\u003eNexD amplifier technologies produce exceptional audio quality, high total efficiency and high power from very compact amplifier designs.\u003c\/p\u003e\n\u003cp\u003eBeginning with the original 'Slash' subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. NexD switching technology stems from this Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.\u003c\/p\u003e\n\u003cp\u003eA traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.\u003c\/p\u003e\n\u003cp\u003eFor the NexD subwoofer amplifiers, JL Audio took the simple fixed PWM approach and enhanced it with a very high switching frequency of 240 kHz. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuitry more compact. Your subwoofers will reward you with tight, rock-solid bass performance.\u003c\/p\u003e\n\u003cp\u003eFor the full-range NexD amplifiers and channels, JL Audio applied a variable, ultra-high speed version of the NexD technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with \"feed-forward\" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.\u003c\/p\u003e\n\u003cp\u003eThe bottom line is simply great audio: clean, powerful and reliable.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":45713117610250,"sku":"91023","price":309.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd400-4-full-range-class-d-4-channel-car-speaker-amp-amplifier-400w-rms-47166343315722.jpg?v=1748431670"},{"product_id":"jl-audio-rd500-1-monoblock-1-channel-class-d-sub-subwoofer-amplifier-500w-rms","title":"JL Audio RD500\/1 Monoblock 1 Channel Class D Sub Subwoofer Amplifier 500w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD500\/1 is a compact monoblock Class D subwoofer amplifier producing 500W RMS at 2 ohms, 350W at 3 ohms and 250W at 4 ohms (14.4V). NexD switching technology, a variable low-pass filter and bass boost, and an onboard LED clipping indicator make it a capable, easy-to-set-up subwoofer amplifier.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eOutput power: 250W x 1 at 4 ohms, 350W x 1 at 3 ohms, 500W x 1 at 2 ohms\u003c\/li\u003e\n\u003cli\u003eFrequency response: 7Hz to 500Hz (+0, -1dB)\u003c\/li\u003e\n\u003cli\u003eLow-pass filter: 12dB\/octave, variable 50Hz to 500Hz\u003c\/li\u003e\n\u003cli\u003eTHD+N at rated power: less than 1% at 2 ohms\u003c\/li\u003e\n\u003cli\u003eInput voltage range: switchable 200mV to 2V RMS (low) or 800mV to 8V RMS (high)\u003c\/li\u003e\n\u003cli\u003eMinimum power and ground wire: 4 AWG\u003c\/li\u003e\n\u003cli\u003eFuse rating: 50A\u003c\/li\u003e\n\u003cli\u003eRemote level control: optional RBC-1\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRD500\/1 monoblock Class D subwoofer amplifier: 500W x 1 at 2 ohms, 250W x 1 at 4 ohms (14.4V)\u003c\/h2\u003e\n\u003cp\u003eBuilt to produce 500 watts into 2 ohms (14.4V, 1% THD), the RD500\/1 amplifier was engineered to deliver plenty of subwoofer power from a sleek, ultra-compact chassis. The secret behind its power is JL Audio's proprietary NexD™ switching technology, which delivers large amounts of power output with precise efficiency and ultra-low distortion.\u003c\/p\u003e\n\u003cp\u003eFor convenience, the RD500\/1's controls are located on top of the amplifier beneath a protective cover, with all connections along one side of its chassis. Signal processing features include a 12dB\/octave low-pass filter with continuously variable frequency selection from 50Hz to 500Hz, and a variable bass boost EQ. Dual-range, differential-balanced inputs accept most input voltage levels. Automatic turn-on (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.\u003c\/p\u003e\n\u003cp\u003eThe RD500\/1 is also equipped with an onboard LED clipping indicator, which lets you set the amplifier's input sensitivity quickly and accurately with no special equipment needed. The RD500\/1 has a durable black powder-coated finish and a top-mounted, dual-colour LED light strip that reports its overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can control the subwoofer output directly from the driver's seat.\u003c\/p\u003e\n\u003ch2\u003eNexD™ switching technology\u003c\/h2\u003e\n\u003cp\u003eNexD™ amplifier technologies produce exceptional audio quality, high total efficiency and high power from very compact amplifier designs.\u003c\/p\u003e\n\u003cp\u003eBeginning with the original \"Slash\" subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. NexD™ switching technology stems from this Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.\u003c\/p\u003e\n\u003cp\u003eA traditional PWM switching amplifier uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amplifiers but not for full-range amplifiers.\u003c\/p\u003e\n\u003cp\u003eTaking this into account when designing the NexD™ subwoofer amplifiers, JL Audio took the simple fixed PWM approach and enhanced it with a very high switching frequency of 240kHz. This pushes the amplifier's bandwidth to at least 500Hz with minimal distortion and improves efficiency, while keeping typically bulky circuitry more compact, for tight, rock-solid bass performance.\u003c\/p\u003e\n\u003cp\u003eFor the full-range NexD™ amplifiers and channels, JL Audio applied a variable, ultra-high speed version of NexD™ technology (switching at well over 400kHz). In these designs, a self-oscillating modulator with \"feed-forward\" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out distortion caused by supply voltage fluctuation. This reduces distortion before feedback is applied, simplifying the overall feedback loop design.\u003c\/p\u003e\n\u003cp\u003eThe bottom line is simply great audio: clean, powerful and reliable.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":45713118265610,"sku":"91024","price":299.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd500-1-monoblock-1-channel-class-d-sub-subwoofer-amplifier-500w-rms-47166344265994.jpg?v=1748431669"},{"product_id":"jl-audio-rd1000-1-rd-series-1-channel-monoblock-subwoofer-amplifier-1000w-rms","title":"JL Audio RD1000\/1 RD Series 1 Channel Monoblock Subwoofer Amplifier 1000w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD1000\/1 is a compact monoblock Class D subwoofer amplifier delivering 1000W RMS at 2 ohms and 600W RMS at 4 ohms (14.4V). It is built for subwoofer systems that need serious bass output from a slim chassis, with a variable low-pass filter and bass boost.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 1 (monoblock), Class D (NexD technology)\u003c\/li\u003e\n\u003cli\u003eRMS power at 14.4V: 600W at 4 ohms, 800W at 3 ohms, 1000W at 2 ohms\u003c\/li\u003e\n\u003cli\u003eRMS power at 12.5V: 500W at 4 ohms, 650W at 3 ohms, 800W at 2 ohms\u003c\/li\u003e\n\u003cli\u003eFrequency response: 7Hz - 500Hz (+0, -1dB)\u003c\/li\u003e\n\u003cli\u003eLow-pass filter: 12dB\/octave, 50-500Hz; bass boost EQ\u003c\/li\u003e\n\u003cli\u003eRemote level control: optional RBC-1\u003c\/li\u003e\n\u003cli\u003eFuse rating: 80A; minimum power\/ground wire 4 AWG\u003c\/li\u003e\n\u003cli\u003eDimensions (H x W x D): 54 x 372 x 177 mm\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRD1000\/1: monoblock Class D subwoofer amplifier, 1000 W\u003c\/h2\u003e\n\u003ch3\u003e1000 W x 1 at 2 ohms \/ 600 W x 1 at 4 ohms, 14.4V\u003c\/h3\u003e\n\u003cp\u003ePurpose-built for subwoofer applications, the RD1000\/1 monoblock amplifier delivers 1000 watts of bass output into 2 ohms (14.4V, 1% THD). At the heart of this ultra-sleek and compact power plant is JL Audio's exclusive NexD Class D technology, permitting high power output with exceptional efficiency and low distortion.\u003c\/p\u003e\n\u003cp\u003eFor your convenience, all of the RD1000\/1's controls are located on top of the amplifier, beneath a protective cover, with all connections found along one side of its chassis. Signal processing features include a 12 dB\/octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ. Dual-range, differential-balanced inputs are also onboard, capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.\u003c\/p\u003e\n\u003cp\u003eThe RD1000\/1 is also equipped with an onboard LED clipping indicator. This feature lets you set your amplifier's input sensitivity quickly and accurately, with no special equipment needed. The RD1000\/1 features a durable, black powder-coated finish and a top-mounted, dual-colour LED light strip that reports the overall status and condition. Control of the subwoofer level from the driver's seat is easily accomplished with the addition of the optional RBC-1 remote level control (sold separately).\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":45713224958218,"sku":"91021","price":489.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd1000-1-rd-series-1-channel-monoblock-subwoofer-amplifier-1000w-rms-47166483431690.jpg?v=1748429127"},{"product_id":"jl-audio-rd900-5-rd-series-class-d-5-channel-stereo-subwoofer-amplifier-900w-rms","title":"JL Audio RD900\/5 RD Series Class D 5 Channel Stereo Subwoofer Amplifier 900w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD900\/5 is a compact 5-channel Class D system amplifier rated at 900 W, built to power four speakers and a subwoofer from one chassis. It delivers 70 W RMS x 4 at 4 Ω plus 500 W RMS x 1 at 2 Ω (14.4 V), making it a tidy single-amp solution for a complete car audio upgrade.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis listing is for the original RD900\/5. The updated version is also available as the \u003ca href=\"\/products\/jl-audio-rd900-5-rd-series-5-channel-stereo-subwoofer-amplifier-900w-rms\"\u003eJL Audio RD900\/5+\u003c\/a\u003e. For remote subwoofer level control, add the \u003ca href=\"\/products\/jl-audio-rbc-1-remote-bass-level-control-for-jd-jx-mx-rd-series-amps-amplifiers\"\u003eJL Audio RBC-1\u003c\/a\u003e (sold separately).\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 5 (4 main + 1 subwoofer), Class D\u003c\/li\u003e\n\u003cli\u003eMain channels (14.4 V): 70 W RMS x 4 @ 4 Ω, 100 W RMS x 4 @ 2 Ω\u003c\/li\u003e\n\u003cli\u003eMain channels bridged (14.4 V): 200 W RMS x 2 @ 4 Ω\u003c\/li\u003e\n\u003cli\u003eSubwoofer channel (14.4 V): 500 W RMS x 1 @ 2 Ω, 225 W RMS x 1 @ 4 Ω\u003c\/li\u003e\n\u003cli\u003eCrossovers: 12 dB\/octave high-pass (main) and low-pass (sub), 50 Hz - 500 Hz\u003c\/li\u003e\n\u003cli\u003eInputs: differential-balanced, switchable 200 mV - 2 V or 800 mV - 8 V RMS\u003c\/li\u003e\n\u003cli\u003eFuse rating: 80 A; minimum power\/ground wire 4 AWG\u003c\/li\u003e\n\u003cli\u003eDimensions (H x W x D): 54 x 372 x 177 mm; weight 2.79 kg\u003c\/li\u003e\n\u003cli\u003eRemote level control: optional RBC-1 (sub channel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRD900\/5\u003c\/h2\u003e\n\u003ch2\u003e5 Ch. Class D System Amplifier, 900 W\u003c\/h2\u003e\n\u003ch2\u003e5-Channel Class D System Amplifier, 70 W x 4 @ 4 Ω + 500 W x 1 @ 2 Ω - 14.4V\u003c\/h2\u003e\n\u003cp\u003eCrafted as an all-in-one, total system solution, the RD900\/5 is engineered to power a complete audio system consisting of a subwoofer + four satellite system with 900 watts of high-performance sound. Equipped with our exclusive NexD™ switching technology, this complete power package efficiently generates a potent 70 watts of crystal-clear audio into 4 ohms, plus a robust 500 watts for a subwoofer system, all from a single compact chassis. Each pair of main channels is also fully bridgeable, stoutly producing 200 watts of full-range audio bliss (into 4 ohms), creating an ultra-powerful 3-channel amplifier.\u003c\/p\u003e\n\u003cp\u003eConveniently located on top of the RD900\/5, you’ll find a complement of studio-grade signal processing features, all hidden beneath a removable protective cover. Each pair of main channels is equipped with a 12 dB \/ octave high-pass filter, with a dedicated low-pass filter for its subwoofer channel. All three crossovers offer continuously variable frequency selection from 50-500 Hz, for precise filtering. Dual-range, differential-balanced inputs are also onboard, capable of accepting most input voltage levels, plus automatic turn-on capability (via signal sensing or DC-offset sensing) for maximum versatility.\u003c\/p\u003e\n\u003cp\u003eLED clipping indicators are also standard equipment for each channel section. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity settings, quickly and accurately, with no special equipment needed. The RD900\/5 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can conveniently control the subwoofer’s output remotely from the driver’s seat.\u003c\/p\u003e\n\u003ch2\u003eNexD™ Switching Technology\u003c\/h2\u003e\n\u003cp\u003eNexD™ amplifier technologies produce exceptional audio quality, unsurpassed total efficiency and high power from very compact amplifier designs.\u003c\/p\u003e\n\u003cp\u003eBeginning with the original 'Slash' subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. Our NexD™ switching technology stems from our Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.\u003c\/p\u003e\n\u003cp\u003eLet's get a little nerdy... A traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.\u003c\/p\u003e\n\u003cp\u003eTaking the above into account when designing the NexD™ subwoofer amplifiers, we have taken the simple fixed PWM approach and enhanced it with a very high switching frequency: 240 kHz, which is about 4x higher than most Class D subwoofer amplifiers. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuity more compact. Your subwoofers will reward you with tight, rock-solid bass performance.\u003c\/p\u003e\n\u003cp\u003eFor the full-range NexD™ amplifiers and channels we applied a variable, ultra-high speed version of the NexD™ technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with \"feed-forward\" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.\u003c\/p\u003e\n\u003cp\u003eThe bottom line is simply great audio: clean, powerful and reliable.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":45713225810186,"sku":"91025","price":479.0,"currency_code":"GBP","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd900-5-rd-series-class-d-5-channel-stereo-subwoofer-amplifier-900w-rms-47166484480266.jpg?v=1748429099"},{"product_id":"jl-audio-rd1500-1-rd-series-1-channel-monoblock-subwoofer-amplifier-1500w-rms","title":"JL Audio RD1500\/1 RD Series 1 Channel Monoblock Subwoofer Amplifier 1500w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD1500\/1 is a compact monoblock Class D subwoofer amplifier rated at 1500 W RMS at 1 or 2 ohms (14.4 V), using JL Audio's NexD switching technology. It is built for high-power subwoofer systems that need strong, low-distortion bass from a slim chassis.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 1 (monoblock), Class D\u003c\/li\u003e\n\u003cli\u003eRMS power at 14.4 V: 750 W at 4 Ω, 1000 W at 3 Ω, 1500 W at 2 Ω, 1500 W at 1 Ω\u003c\/li\u003e\n\u003cli\u003eRMS power at 12.5 V: 750 W at 4 Ω, 1000 W at 3 Ω, 1200 W at 2 Ω, 1500 W at 1 Ω\u003c\/li\u003e\n\u003cli\u003eFrequency response: 7 Hz to 500 Hz (+0, -1 dB)\u003c\/li\u003e\n\u003cli\u003eLow-pass filter: 50 Hz to 500 Hz, 12 dB\/octave, with variable bass boost EQ\u003c\/li\u003e\n\u003cli\u003eFuse rating: 150A (AFS or AGU); minimum 2 AWG power and ground wire\u003c\/li\u003e\n\u003cli\u003eDimensions (H x W x D): 54 x 458 x 177 mm\u003c\/li\u003e\n\u003cli\u003eRemote level control: optional RBC-1 (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe rated power figures require the \"Low Z\" switch to be set for the load: the \"2Ω\" position for 4, 3 and 2 Ω, and the \"1Ω\" position for 1 Ω.\u003c\/p\u003e\n\u003ch2\u003eRD1500\/1 Monoblock Class D Subwoofer Amplifier\u003c\/h2\u003e\n\u003ch3\u003e1500 W x 1 @ 1 - 2 Ω \/ 750 W x 1 @ 4 Ω - 14.4V\u003c\/h3\u003e\n\u003cp\u003eEngineered for high-power subwoofer applications, the RD1500\/1 monoblock amplifier is built to deliver staggering amounts of world-class bass output. Equipped with a special low impedance circuit, the RD1500\/1 is capable of generating 1500 watts of output power at either 1 or 2 ohms (14.4V, 1% THD). At the heart of this ultra-sleek and compact power plant is JL Audio's exclusive NexD™ Class D technology, permitting high power output with exceptional efficiency and low distortion.\u003c\/p\u003e\n\u003cp\u003eFor your convenience, all of the RD1500\/1's controls are located on top of the amplifier, beneath a protective cover, with all connections found along one side of its chassis. Signal processing features include a 12 dB \/ octave low-pass filter, with continuously variable frequency selection from 50-500 Hz, and a variable bass boost EQ.\u003c\/p\u003e\n\u003cp\u003eDual-range, differential-balance inputs are also onboard, capable of accepting most input voltage levels. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard, along with a set of preamp outputs so you can easily pass signals to another amplifier.\u003c\/p\u003e\n\u003cp\u003eThe RD1500\/1 is also equipped with an onboard LED clipping indicator. This innovative feature lets you easily set your amplifier's input sensitivity setting, quickly and accurately, with no special equipment needed. The RD1500\/1 features a durable, black powder-coated finish and a top-mounted, dual-colour LED light strip that reports the overall status and condition. Control of the subwoofer level from the driver's seat is easily accomplished with the addition of the optional RBC-1 remote level control (sold separately).\u003c\/p\u003e\n\u003ch2\u003eNexD™ Switching Technology\u003c\/h2\u003e\n\u003cp\u003eNexD™ amplifier technologies produce exceptional audio quality, high total efficiency and high power from very compact amplifier designs.\u003c\/p\u003e\n\u003cp\u003eBeginning with the original 'Slash' subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. NexD™ switching technology stems from JL Audio's Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.\u003c\/p\u003e\n\u003cp\u003eLet's get a little nerdy. A traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping.\u003c\/p\u003e\n\u003cp\u003eThe cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.\u003c\/p\u003e\n\u003cp\u003eTaking the above into account when designing the NexD™ subwoofer amplifiers, JL Audio took the simple fixed PWM approach and enhanced it with a very high switching frequency of 240 kHz. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuitry more compact. Your subwoofers will reward you with tight, rock-solid bass performance.\u003c\/p\u003e\n\u003cp\u003eFor the full-range NexD™ amplifiers and channels, a variable, ultra-high speed version of the NexD™ technology is applied (switching at well over 400 kHz). In these designs, a self-oscillating modulator with \"feed-forward\" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.\u003c\/p\u003e\n\u003cp\u003eThe bottom line is simply great audio: clean, powerful and reliable.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":45713226596618,"sku":"91022","price":569.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd1500-1-rd-series-1-channel-monoblock-subwoofer-amplifier-1500w-rms-47166486315274.jpg?v=1748429131"},{"product_id":"jl-audio-rd900-5-rd-series-5-channel-stereo-subwoofer-amplifier-900w-rms","title":"JL Audio RD900\/5+ RD Series 5 Channel Stereo Subwoofer Amplifier 900w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD900\/5+ is a 5-channel Class D system amplifier rated at 900 W, designed to run four speakers and a subwoofer from a single compact chassis. It is listed at 70 W RMS x 4 at 4 Ω plus 500 W RMS x 1 at 2 Ω (14.4 V) for a complete system upgrade with one amplifier.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis listing is for the RD900\/5+; the manufacturer text below refers to the RD900\/5. The original model is also listed as the \u003ca href=\"\/products\/jl-audio-rd900-5-rd-series-class-d-5-channel-stereo-subwoofer-amplifier-900w-rms\"\u003eJL Audio RD900\/5\u003c\/a\u003e. Remote subwoofer level control is available with the optional \u003ca href=\"\/products\/jl-audio-rbc-1-remote-bass-level-control-for-jd-jx-mx-rd-series-amps-amplifiers\"\u003eJL Audio RBC-1\u003c\/a\u003e.\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 5 (4 main + 1 subwoofer), Class D\u003c\/li\u003e\n\u003cli\u003eMain channels (14.4 V): 70 W RMS x 4 @ 4 Ω, 100 W RMS x 4 @ 2 Ω\u003c\/li\u003e\n\u003cli\u003eMain channels bridged (14.4 V): 200 W RMS x 2 @ 4 Ω\u003c\/li\u003e\n\u003cli\u003eSubwoofer channel (14.4 V): 500 W RMS x 1 @ 2 Ω, 225 W RMS x 1 @ 4 Ω\u003c\/li\u003e\n\u003cli\u003eCrossovers: 12 dB\/octave high-pass (main) and low-pass (sub), 50 Hz - 500 Hz\u003c\/li\u003e\n\u003cli\u003eInputs: differential-balanced, switchable 200 mV - 2 V or 800 mV - 8 V RMS\u003c\/li\u003e\n\u003cli\u003eFuse rating: 80 A; minimum power\/ground wire 4 AWG\u003c\/li\u003e\n\u003cli\u003eDimensions (H x W x D): 54 x 372 x 177 mm; weight 2.79 kg\u003c\/li\u003e\n\u003cli\u003eRemote level control: optional RBC-1 (sub channel)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eRD900\/5+\u003c\/h2\u003e\n\u003ch2\u003e5 Ch. Class D System Amplifier, 900 W\u003c\/h2\u003e\n\u003ch2\u003e5-Channel Class D System Amplifier, 70 W x 4 @ 4 Ω + 500 W x 1 @ 2 Ω - 14.4V\u003c\/h2\u003e\n\u003cp\u003eCrafted as an all-in-one, total system solution, the RD900\/5 is engineered to power a complete audio system consisting of a subwoofer + four satellite system with 900 watts of high-performance sound. Equipped with our exclusive NexD™ switching technology, this complete power package efficiently generates a potent 70 watts of crystal-clear audio into 4 ohms, plus a robust 500 watts for a subwoofer system, all from a single compact chassis. Each pair of main channels is also fully bridgeable, stoutly producing 200 watts of full-range audio bliss (into 4 ohms), creating an ultra-powerful 3-channel amplifier.\u003c\/p\u003e\n\u003cp\u003eConveniently located on top of the RD900\/5, you’ll find a complement of studio-grade signal processing features, all hidden beneath a removable protective cover. Each pair of main channels is equipped with a 12 dB \/ octave high-pass filter, with a dedicated low-pass filter for its subwoofer channel. All three crossovers offer continuously variable frequency selection from 50-500 Hz, for precise filtering. Dual-range, differential-balanced inputs are also onboard, capable of accepting most input voltage levels, plus automatic turn-on capability (via signal sensing or DC-offset sensing) for maximum versatility.\u003c\/p\u003e\n\u003cp\u003eLED clipping indicators are also standard equipment for each channel section. This all-new, innovative feature lets you easily set your amplifier’s input sensitivity settings, quickly and accurately, with no special equipment needed. The RD900\/5 features a durable, black powder-coated finish and a top-mounted, dual-color LED light strip that reports the overall status and condition. With the addition of an RBC-1 remote level control (sold separately), you can conveniently control the subwoofer’s output remotely from the driver’s seat.\u003c\/p\u003e\n\u003ch2\u003eNexD™ Switching Technology\u003c\/h2\u003e\n\u003cp\u003eNexD™ amplifier technologies produce exceptional audio quality, unsurpassed total efficiency and high power from very compact amplifier designs.\u003c\/p\u003e\n\u003cp\u003eBeginning with the original 'Slash' subwoofer amplifiers, JL Audio has been at the forefront of Class D amplifier design. Our NexD™ switching technology stems from our Class D expertise to deliver outstanding fidelity and efficiency, leading to compact amplifiers that deliver high power and exceptional value.\u003c\/p\u003e\n\u003cp\u003eLet's get a little nerdy... A traditional PWM switching amp design uses a fixed switching frequency and varies the pulse width based solely on the audio input signal to the pulse modulator. This basic approach assumes some ideal conditions, like a rock-steady power supply, that do not necessarily occur in a real, in-car installation. Power supply sag with signal causes distortion at all power levels with these designs, even well below clipping. The cure for this is feedback (a corrective signal sent back to the input side), but this becomes impractical as the audio frequency increases, making it a good solution for band-limited (subwoofer) amps, but not for full-range amplifiers.\u003c\/p\u003e\n\u003cp\u003eTaking the above into account when designing the NexD™ subwoofer amplifiers, we have taken the simple fixed PWM approach and enhanced it with a very high switching frequency: 240 kHz, which is about 4x higher than most Class D subwoofer amplifiers. This pushes the amplifier's bandwidth to at least 500 Hz with minimal distortion and improves efficiency, while keeping typically bulky circuity more compact. Your subwoofers will reward you with tight, rock-solid bass performance.\u003c\/p\u003e\n\u003cp\u003eFor the full-range NexD™ amplifiers and channels we applied a variable, ultra-high speed version of the NexD™ technology (switching at well over 400 kHz). In these designs, a self-oscillating modulator with \"feed-forward\" sends information about the instantaneous power supply voltage to the modulator, combining this with the input signal to cancel out any distortion due to supply voltage fluctuation. This reduces distortion prior to applying feedback, simplifying the overall feedback loop design.\u003c\/p\u003e\n\u003cp\u003eThe bottom line is simply great audio: clean, powerful and reliable.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":52359861305610,"sku":"92273","price":569.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/jl-audio-amplifier-jl-audio-rd900-5-rd-series-class-d-5-channel-stereo-subwoofer-amplifier-900w-rms-47166484480266.jpg?v=1748429099"},{"product_id":"jl-audio-rd800-6-rd-series-6-channel-stereo-subwoofer-amplifier-800w-rms","title":"JL Audio RD800\/6 RD Series 6 Channel Full Range Class D Amplifier 800w RMS","description":"\u003cp\u003e\u003cstrong\u003eThe JL Audio RD800\/6 is an ultra-compact 6-channel Class D full-range amplifier with 800W total output: 100W RMS x 4 plus 200W RMS x 2 at 2 ohms (14.4V). With bridgeable channel pairs, it can power a full speaker system with a subwoofer or an active 3-way front stage.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eKey specifications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eChannels: 6, Class D full-range\u003c\/li\u003e\n\u003cli\u003eChannels 1 - 4: 100W RMS x 4 @ 2 ohm, 75W RMS x 4 @ 4 ohm\u003c\/li\u003e\n\u003cli\u003eChannels 5 - 6: 200W RMS x 2 @ 2 ohm, 150W RMS x 2 @ 4 ohm\u003c\/li\u003e\n\u003cli\u003eBridged @ 4 ohm: 200W RMS x 2 (ch 1 - 4), 400W RMS x 1 (ch 5 - 6)\u003c\/li\u003e\n\u003cli\u003eFrequency response: 12 Hz - 22 kHz (+0, -1 dB)\u003c\/li\u003e\n\u003cli\u003eInput: differential-balanced, 200 mV - 8V RMS\u003c\/li\u003e\n\u003cli\u003eOperating voltage: 10 - 16V DC\u003c\/li\u003e\n\u003cli\u003eFilters (12 dB\/octave): ch 1 - 2 high-pass (50 Hz - 5 kHz); ch 3 - 4 and 5 - 6 high-pass or bandpass (50 - 500 Hz)\u003c\/li\u003e\n\u003cli\u003eRecommended fuse: 80A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eJL Audio® RD800\/6 6 Channel Car Full-range Amplifier (800 W)\u003c\/h2\u003e\n\u003ch3\u003eSleek, powerful, packed with value\u003c\/h3\u003e\n\u003cp\u003eThe look is amazing, and the performance backs it up. This ultracompact 6-channel RD series amplifier from JL Audio is engineered to generate loads of power with exceptional efficiency and low distortion. The result: premium audio quality with significantly reduced current draw and heat.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e12 dB\/octave filters with variable high-pass and bandpass modes\u003c\/li\u003e\n\u003cli\u003eSelectable input voltage: low (200 mV to 2V RMS) to high (800 mV to 8V RMS)\u003c\/li\u003e\n\u003cli\u003e3 turn-on options: +12V remote wire, signal sensing or DC offset\u003c\/li\u003e\n\u003cli\u003eOnboard LED clipping indicator simplifies level setting\u003c\/li\u003e\n\u003cli\u003eSignal routing flexibility with selectable input mode and type\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eEfficient Class D design\u003c\/h2\u003e\n\u003cp\u003eSmall size, minimal heat and lots of power: Class D amplifier design offers significant advantages. And our NexD™ switching technology adds even more, using enhanced pulse width modulation techniques to boost the amplifier’s bandwidth while minimising distortion and improving efficiency.\u003c\/p\u003e\n\u003ch2\u003eClean, powerful, reliable\u003c\/h2\u003e\n\u003cp\u003eThe 4-channel amp churns out 400 watts of total power, 100 watts from each channel into a 2-ohm load (14.4 volts, 1% THD). The 6-channel amp outputs 800 watts of total power with an additional pair of channels capable of 200 watts each into a 2-ohm load (14.4 volts, 1% THD). All RD channel pairs are bridgeable for maximum application flexibility.\u003c\/p\u003e\n\u003ch2\u003eSignal processing\u003c\/h2\u003e\n\u003cp\u003eThis RD series amplifier’s signal processing features 12-decibel\/octave filters on each channel pair: channels 1 and 2 have a high-pass filter variable from 50 Hz to 5 kHz, while channels 3 and 4 and channels 5 and 6 each offer high-pass or bandpass filtering, continuously variable from 50–500 Hz. The 6-channel model offers triple high-pass filters or full 3-way crossover capability.\u003c\/p\u003e\n\u003ch2\u003eLED clipping indicators\u003c\/h2\u003e\n\u003cp\u003eLED clipping indicators on the control panel let you quickly set each channel pair’s input sensitivity, without the need for additional test equipment.\u003c\/p\u003e\n\u003ch2\u003eEasy connectivity\u003c\/h2\u003e\n\u003cp\u003eWith “input type” switches on the stereo channel sections, RD series amps can eliminate the need for Y-adapters when bridging stereo output channels.\u003c\/p\u003e","brand":"JL Audio","offers":[{"title":"Default Title","offer_id":52359958855946,"sku":"92274","price":569.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/RD800_6.jpg?v=1767706380"}],"url":"https:\/\/www.cen.uk\/collections\/jl-audio-rd-amplifiers.oembed","provider":"CEN","version":"1.0","type":"link"}