Power that never strains
100 watts to each speaker at 4 ohm, 175 at 2 ohm, or bridge to 350 watts a side for front components and a small sub. Under 0.02% distortion and a 99 dB signal to noise ratio.
4 x 100W Class D
Musway NX175.4
Four Channels. 100 Watts Each.
A compact Class D four channel that puts 100 clean watts on every speaker at 4 ohm, 175 at 2 ohm, or bridges to 350 watts a side. Adjustable crossovers on both pairs, EPS high-level inputs, and a footprint the size of a paperback.
$559.95Free shipping
Free nationwide shipping
3 year warranty included
30 day hassle-free returns
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2021 to 2026
Hi-Fi Product of the Year
100% German
Engineered and measured
3 Year
Warranty on every unit
Plug and Play
Factory-fit integration
Why drivers upgrade
More headroom for the speakers you already have.
Factory head units clip long before your speakers do. The NX175.4 gives all four corners real power while keeping your radio, screen, and controls exactly where they are.
Crossovers built in
Independent low or high pass filters on channels 1 and 2 and channels 3 and 4, adjustable from 50 to 5,000 Hz, so tweeters, mids, and a sub each get the right band.
Fits where nothing else does
5.8 by 3.5 by 1.6 inches. Under a seat, behind a kick panel, or in a trunk corner, with auto turn-on from your factory speaker wires.
Built for the details
Full system control in a chassis that hides anywhere.
4 x 100W Class D
100W at 4 ohm, 175W at 2 ohm, 2 x 350W bridged at 4 ohm
Adjustable Crossovers
Low or high pass on each channel pair, 50 to 5,000 Hz, for active or passive setups.
99 dB Signal to Noise
Under 0.02% distortion at 5W. Silent between tracks, clean at volume.
10 to 40,000 Hz Response
Full range from sub bass to beyond hearing for hi-res sources.
EPS High-Level Inputs
Type D inputs with error protection connect to factory speaker wires with auto turn-on.
Start-Stop Ready
Runs from 8.5 to 16.5 volts and stays stable through engine start-stop cycles.
Technical specifications
| Amplifier type | 4-channel digital Class D |
|---|---|
| Power at 4 ohm | 4 x 100W |
| Power at 2 ohm | 4 x 175W |
| Bridged at 4 ohm | 2 x 350W |
| Frequency response | 10 to 40,000 Hz (-1 dB) |
| Signal to noise | greater than 99 dB |
| THD+N | under 0.02% at 5W |
| Input sensitivity | 425 mV to 8.0 V |
| Crossovers | low or high pass, 50 to 5,000 Hz, per channel pair |
| Operating voltage | 8.5 to 16.5 V |
| External fuse | 60 A |
| Dimensions | 5.8 x 3.5 x 1.6 inches |
| Warranty | 3 years |
| Box | 1x NX175.4 amplifier, 1x high-level input harness, 1x owner's manual, 1x mounting hardware |
| Note | A 60 A external fuse and 4 gauge power wire are recommended. Pair with the NX600.1 or NX800.1 monoblock if you want a dedicated subwoofer channel. |
What is in the box
- 1xMusway NX175.4 amplifier
- 1xPower harness
- 1xInput and output harness
- 1xUSB tuning cable
- 1xExtra 30 amp ATC fuse
- 1xMounting hardware
- 1xOwner's manual
Add the PK-RCA6 RCA input harness at checkout if you are feeding the NX175.4 from an aftermarket head unit with RCA outputs.
Installation
Three steps from factory flat to full range.
1
Connect
Run power and ground with a 60 A fuse, then plug the high-level harness into your factory speaker wires. Auto turn-on handles the rest.
2
Mount
At 5.91 by 8.66 inches the brushed aluminum chassis fits under a seat or behind a trim panel. Class D runs cool At 5.8 by 3.5 inches it fits under a seat or behind a panel. Class D runs cool with no fan.with no fan.
3
Tune
Set the front pair high pass around 80 Hz, match gains to your source, and run the rear pair full range or bridged to a sub.
Compare
Why not just buy any four channel?
| Feature | Factory system | Generic amp | Musway NX175.4 |
|---|---|---|---|
| 100W per channel at 4 ohm | − | Varies | |
| Adjustable crossovers on both pairs | − | Varies | |
| 99 dB signal to noise | − | − | |
| Plug and play with factory wiring | − | ||
| Optical input and app tuning | − | − | |
| 3 year warranty | − | Varies | |
| Compact 3.5 inch wide chassis | − | − |
Verified reviews
Drivers who stopped settling for factory sound.
★★★★★
4.6 out of 5 from 86 verified reviews
Today's offer
NX175.4 with free nationwide shipping. 23 in stock.
Order the NX175.4 on its own, or pair it with Musway speakers or a monoblock so the whole system arrives in one box.
- Free nationwide shipping on every order
- 3 year warranty registered automatically
- 30 day returns if it is not the upgrade you expected
- DSP software, manual, and wiring diagrams included with your order
Choose your kit
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Total
Secure encrypted checkout. Ships within 24 hours from our US warehouse.
QuestionsChoose your kit
Everything you want to know before you order.
Still unsure if the NX175.4 fits your vehicle? Every order includes free fitment and tuning support from the Musway USA team.
Yes. The Type D high-level inputs with EPS accept factory speaker wire signals with auto turn-on, so the dash stays untouched.
Yes. Bridge channels 3 and 4 for 350 watts at 4 ohm and set the low pass around 80 Hz. For more bass add the NX600.1 or NX800.1 monoblock.
Yes. Each channel pair has its own low or high pass filter from 50 to 5,000 Hz for active setups.
A 60 A external fuse and 4 gauge power and ground wire are recommended.
Yes. It runs from 8.5 to 16.5 volts and stays stable through engine start-stop cycles.
Return it within 30 days in its original packaging for a full refund.
NX175.4 with free nationwide shipping. 23 in stock.
Order the NX175.4 on its own, or pair it with Musway speakers or a monoblock so the whole system arrives in one box.
30 day money back guarantee
NX175.4
$559.95
$559.95
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All reviews
Every review, straight from the driver's seat.
★★★★★
4.6 out of 5 from 86 verified reviews
