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ESX Audio
ESX QS-FOUR 4-Channel Class D Nano Amplifier
4-Channel
£169.99
Available to order
4-Channel
SKU QS-FOUR
Manual included
Fitment
System planning support
Tech specs
Shown below
Manuals/downloads
Download linked
Warranty
Manufacturer backed
Plan the system before checkout
Check channel layout, power, impedance and DSP requirements before choosing wiring or speakers.
Why choose this product?
The QS-FOUR is for compact speaker upgrades where there is little room for a conventional amplifier. It gives front and rear speakers a 4-channel Class D power lift from a tiny chassis and still leaves low-level outputs available for an active subwoofer.
Key features
- 4-channel Class D Plug+Play nano digital amplifier
- 4 x 35/45/60W RMS at 4/3/2 ohm
- 2 x 120W RMS at 4 ohm bridged
- Switchable HPF/LPF at 80 Hz
- Low-level outputs for adding an active subwoofer
- 90 x 35 x 80 mm ultra-compact chassis
- Efficiency up to 90%
- 4 x 35/45/60W RMS at 4/3/2 ohm
- 2 x 120W RMS at 4 ohm bridged
- Switchable HPF/LPF at 80 Hz
- Low-level outputs for adding an active subwoofer
- 90 x 35 x 80 mm ultra-compact chassis
- Efficiency up to 90%
Technical details
Specifications
- 4-Channel Class D Plug+Play Nano Digital Amplifier
- 4 x 35/45/60 Watts RMS @ 4/3/2 ohm
- 2 x 120 Watts RMS @ 4 ohm bridged
- 2 x HPF/LPF @ 80 Hz
- Dimensions 90 x 35 x 80 mm
- Efficiency up to 90%
Downloads
- Product manual available
- Datasheet available
Compatibility and support
For vehicle-specific advice, send your vehicle make, model, year, current factory audio setup and what you want to improve.
We reply by email or WhatsApp so you have the recommendation in writing.
Downloads
Download owner manual
Manufacturer documentation supplied where available.
Need fitment help?
Ask before ordering if the vehicle, wiring or DSP setup is unclear.
Send the make, model, year, factory audio setup and what you want to improve. We’ll reply in writing so you have the advice to refer back to.