{"title":"4 Channel Amplifiers","description":"\u003cp\u003ePower your car audio system with premium 4-channel amplifiers from top brands like Helix, JL Audio, and Audison. Perfect for driving multiple speakers, these amplifiers deliver crystal-clear sound and powerful performance. Whether you're looking for reliable, high-performance options or sleek designs, we have a wide range to suit your needs. Shop today for fast UK delivery and expert service.\u003c\/p\u003e","products":[{"product_id":"audison-sr-4-300-v2-amp-4-channel-high-power-compact-speaker-amplifier-300w-rms","title":"Audison SR 4.300 V2 Amp 4 Channel High Power Compact Speaker Amplifier 300w RMS","description":"\u003cp\u003e\u003cstrong\u003eSR 4.300 V2 \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cstrong\u003eAmplifier | 520 W | 4×85 W | D-class\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSR AMPLIFIERS\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA sophisticated design distinguishes the SR amplifiers, a complete line that ranges from 5 channels to monophonic, all featuring the use of the most advanced D Class technology, for exceptional audio performance within compact dimensions.\u003c\/p\u003e\n\u003cp\u003eAudison SR 4.300 4-channel amplifier with crossover and great power packed into ultra-compact dimensions (85 W x 4 4Ω)SR line, perfected by taking full advantage of the capabilities of the latest amplification devices. After numerous listening tests with professionals and enthusiasts, Audison's R\u0026amp;D team decided to adopt a new class D technology called ADT (Audison D-Class Technology) for this line of amplifiers, which has made it possible to considerably reduce their size, totally preserving the audio performance that characterises every Audison design.As far as the electronic design is concerned, every aesthetic and functional detail of the Audison SR 4.300 has been taken care of, resulting in a compact amplifier made of extruded aluminium with rounded corners, which facilitates the installation of the product in narrow spaces.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUSS - Universal Speakers Simulator\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThanks to the integration of Audison USS technology (Universal Speakers Simulator) in the high-level inputs, the SR amplifiers can also be appropriately connected to OEM sources featuring the “speaker load detection” function that monitor the presence of a low-impedance load to enable audio outputs.\u003c\/p\u003e\n\u003cp\u003eThanks to the generous heat sinks on the two short sides of the amplifiers, there is no need for internal cooling fans, which often cause noise and dust accumulation.In keeping with tradition, the SR amplifiers confirm their vocation for versatility by including on all models a complete filter section, suitable for any kind of audio system configuration. The controls, protected by a satin-finished aluminium panel, are located on the top panel of the amplifier, so that they can be easily reached from above, even after the product has been installed.\u003c\/p\u003e\n\u003cp\u003eWhen the system includes an Audison bit processor, the filter section can be totally excluded.Audison USSThanks to the integration of Audison USS (Universal Speakers Simulator) technology in the high level inputs, the SR amplifiers can also be conveniently connected to OEM sources equipped with the 'speaker load detection' function, which monitors the presence of a low impedance load enabling the audio outputs.Audison SR 4.300 allows multiple connectivityAll models have balanced high-level inputs for connecting to the OEM headunit speaker output and a low-level RCA for after-market speakers. When using the high-level input, the ART (Automatic Remote On\/Off) function can be enabled to control the amplifiers' power-up with the headunit's power button. In addition, there is a remote IN \/ OUT socket to allow control of multiple amplifiers in cascade that turn on when needed.Through the PRE-OUT signal using the Speaker-IN socket it is possible to interface the amplifier with OEM sources that only have amplified outputs, allowing for system expansion.\u003c\/p\u003e","brand":"Audison","offers":[{"title":"Default Title","offer_id":45713020649738,"sku":"90235","price":349.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/audison-amplifier-audison-sr-4-300-v2-amp-4-channel-high-power-compact-speaker-amplifier-300w-rms-47166156407050.jpg?v=1748431595"},{"product_id":"audison-sr-4-500-v2-amp-4-channel-high-power-compact-speaker-amplifier-500w-rms","title":"Audison SR 4.500 V2 Amp 4 Channel High Power Compact Speaker Amplifier 500w RMS","description":"\u003cp\u003e\u003cstrong\u003eSR 4.500 V2 \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cstrong\u003eAmplifier | 880 W | 4×125 W | D-class \u003c\/strong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cstrong\u003e\u003cstrong\u003eSR AMPLIFIERS\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cstrong\u003e \u003c\/strong\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA sophisticated design distinguishes the SR amplifiers, a complete line that ranges from 5 channels to monophonic, all featuring the use of the most advanced D Class technology, for exceptional audio performance within compact dimensions.\u003c\/p\u003e\n\u003cp\u003eThe Audison SR 4.500 4-channel amplifier with crossover features great power packed into ultra-compact dimensions (130 W x 4 @ 4Ω).As far as the electronic design is concerned, every aesthetic and functional detail of the Audison SR 4.500 has been taken care of, resulting in a compact amplifier made of extruded aluminum with rounded corners, which facilitates the installation of the product in narrow spaces.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eElegant and functional design with rounded corners to minimize space, facilitating installation.\u003c\/li\u003e\n\u003cli\u003eBuilt-in USS (Universal Speakers Simulator).\u003c\/li\u003e\n\u003cli\u003eFull built-in crossover section.\u003c\/li\u003e\n\u003cli\u003eOptional VCR-S1 remote control offers the possibility to adjust the subwoofer level (-20 \/ + 6 dB) to your musical preference.\u003c\/li\u003e\n\u003cli\u003eBalanced high-level inputs for connecting to the OEM head unit speaker output\u003c\/li\u003e\n\u003cli\u003eLow-level RCA for after-market speakers.\u003c\/li\u003e\n\u003cli\u003eART (Automatic Remote On\/Off) function.\u003c\/li\u003e\n\u003cli\u003eRemote IN \/ OUT socket to allow control of multiple amplifiers.\u003c\/li\u003e\n\u003cli\u003ePRE-OUT allows for system expansion.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThanks to the generous heat sinks on the two short sides of the amplifiers, there is no need for internal cooling fans, which often cause noise and dust accumulation. In keeping with tradition, the SR amplifiers confirm their vocation for versatility by including on all models a complete filter section, suitable for any kind of audio system configuration. The controls, protected by a satin-finished aluminium panel, are located on the top panel of the amplifier, so that they can be easily reached from above, even after the product has been installed. When the system includes an Audison bit processor, the filter section can be totally excluded.\u003c\/p\u003e","brand":"Audison","offers":[{"title":"Default Title","offer_id":45713021075722,"sku":"90236","price":449.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0745\/5431\/0922\/files\/audison-amplifier-audison-sr-4-500-v2-amp-4-channel-high-power-compact-speaker-amplifier-500w-rms-47166158307594.jpg?v=1748431595"},{"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\u003eRD400\/4\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e4 Ch. 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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 a whopping 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 all-new 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 all-new, innovative feature lets you easily set your amplifier’s input sensitivity settings, quickly and accurately, with no special equipment needed. You’ll also find a set of preamp outputs on-hand, 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-color LED light strip that reports the overall status and condition.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNexD™ Switching Technology\u003c\/strong\u003e\u003c\/p\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. 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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 line-level or speaker-level signals. Automatic turn-on capability (via signal sensing or DC-offset sensing) is standard equipment.\u003c\/p\u003e\n\u003cp\u003eOnboard LED-clipping indicators are also included surrounding each input sensitivity control. This convenient feature lets you set your amplifier’s input sensitivity, quickly and accurately, without special equipment. 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