Hertz Dieci DP 4.300 4 Channel Stereo Amp Hi Res Class A B Amplifier 340w RMS
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The Hertz Dieci DP 4.300 is a 4-channel Class AB car amplifier from the Hertz Dieci Power range, delivering 340W RMS total with Hi-Res Audio certification. It outputs 60W x 4 at 4 ohms or 85W x 4 at 2 ohms (1% THD), is fully bridgeable, and includes speaker-level inputs with automatic remote turn-on — making it well suited to factory head unit upgrades.
Key specifications
- Channels: 4 - 3 - 2 (fully bridgeable), Class AB, 2 ohm stable
- RMS power at 14.4V, 1% THD: 60W x 4 at 4 ohms, 85W x 4 at 2 ohms, 170W x 2 bridged at 4 ohms
- RMS power at 14.4V, 10% THD: 75W x 4 at 4 ohms, 105W x 4 at 2 ohms, 210W x 2 bridged at 4 ohms
- Bandwidth: 10Hz - 45kHz (-3dB), Hi-Res Audio certified
- Inputs: Pre-In (0.32 - 8V RMS) and Speaker-In (1.6 - 40V RMS); full-range pre-outs
- Crossovers: front and rear high-pass and low-pass, 50-4000Hz, 12dB/oct
- Bass boost: 50Hz, 0 - 9dB
- Operating voltage: 6.5 - 16.5V DC; fuse 2 x 20A
DP 4.300: 4 - 3 - 2 channels, 340W
Hi-Res Audio certification means the DP 4.300 covers 10Hz to 45kHz, reproducing fine musical detail accurately. Fully bridgeable 4-channel Class AB amplification with 2 ohm stability delivers strong output in a compact footprint.
The operating supply voltage spans 6.5 to 16.5V DC, and Speaker-In sensitivity handles 1.6 to 40V RMS. An integrated Universal Speaker Simulator ensures compatibility with a wide range of source units, including OEM systems.
Balanced input circuitry on both Pre-In and Speaker-In inputs provides high noise rejection for a clean signal. Controls include adjustable input levels, front and rear high-pass and low-pass crossover filters (50-4000Hz, 12dB/oct) and a bass boost of 0 - 9dB at 50Hz.
Automatic Remote Turn-On/Off is triggered by OEM radio speaker outputs, removing the need for a separate remote wire. Both Speaker-In and Pre-In inputs provide access to full-range pre-outs for flexible system expansion.
Build quality includes a solid machined terminal block, status LED and a removable top panel protecting controls and connections. The DP 4.300 pairs well with the Hertz Dieci DSK 165.3 component speakers for a matched Dieci system.
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Specification
| Channels | 4 - 3 - 2 |
|---|---|
| Amp class | AB |
| Nominal power supply voltage (fuse) | 11 - 15 VDC (2 x 20 A) |
| Operating power supply voltage | 6.5 - 16.5 VDC |
| Idling current | 0.8 A |
| Standby current draw | 5 uA |
| Remote IN | 4 - 15 VDC (1.5 mA) |
| Efficiency | 59% |
| Damping factor @ 1 kHz, 1W | 105 |
| Bandwidth @ -3 dB | 10Hz - 45kHz |
| S/N ratio (A-weighted @ 1 V Input) | 100 dBA |
| @ 4 Ch | 2 Ω |
| @ 3 Ch | 2 Ω + 2 Ω + 4 Ω |
| @ 2 Ch | 4 Ω |
More specs
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What's Included
- Hertz Dieci DP 4.300
Hertz
About the Hertz DP 4.300
From our tech experts at CEN
A 4-channel amplifier from the Hertz Dieci line, rated at 420w RMS. Enough channels for a front and rear stage, or a front stage with the remaining channels bridged onto a sub.
Who it suits
Drivers who have upgraded their speakers and found the head unit cannot drive them properly. This is the step that makes good speakers sound like good speakers.
Our tech experts advise
Power figures mean little until the amplifier is matched to the speakers and the gains are set with a meter rather than by ear. It needs a fused feed from the battery on the correct cable gauge. Installation is priced per vehicle, so get in touch with your make, model and year and we will confirm what it needs. See car audio installation.
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Frequently Asked Questions
Q: How do I choose the right amplifier for my speakers or subwoofer?
A: Match the amplifier's RMS output per channel to the RMS handling of your speakers or subwoofer at the same impedance. The Specification tab lists the power figures. If in doubt, contact CEN with your setup and we will recommend a match.
Q: What wiring do I need to install this amplifier?
A: You will need an amplifier wiring kit sized to the amplifier's power draw, typically including power and earth cable, a fuse, RCA leads and a remote wire. CEN stocks complete wiring kits, and the amplifier's fuse rating is the guide to the cable gauge required.
Q: What class of amplifier is this and does it matter?
A: Class D amplifiers are compact and efficient, ideal for subwoofers and modern installs. Class AB designs are traditionally favoured for outright sound quality on mid and high frequencies. The class is listed in the Specification tab where provided.
Q: Will an amplifier work with my factory head unit?
A: Yes, in most cases. If your head unit has no RCA outputs you will need a line output converter to feed the amplifier a clean signal. CEN stocks line output converters and can advise the right one for your vehicle.
Q: Can CEN install this amplifier?
A: Yes. CEN offers professional amplifier installation from our Nottingham premises, including secure mounting, wiring and setup. Contact us to book.
Q: Can the Hertz DP 4.300 connect to a factory radio?
A: Yes. It has a balanced Speaker-In input accepting 1.6 to 40V RMS, an integrated Universal Speaker Simulator and Automatic Remote Turn-On/Off triggered by the OEM radio speaker outputs.
Q: How much power does the Hertz DP 4.300 deliver?
A: At 14.4V and 1% THD it delivers 60W x 4 at 4 ohms, 85W x 4 at 2 ohms or 170W x 2 bridged at 4 ohms. At 10% THD the figures are 75W x 4, 105W x 4 and 210W x 2.
Q: Can the DP 4.300 run in 3-channel mode?
A: Yes. It can run as 4, 3 or 2 channels. In 3-channel mode at 1% THD it delivers 60W x 2 at 4 ohms plus 170W x 1, or 85W x 2 at 2 ohms plus 170W x 1.
