Can anybody tell me definitively--no guessing please--that the aux input is stereo? Is it only inputting one channel (left or right), or summing them?

The system is just giving you a mono signal the subwoofer output on your receiver is just a mono signal unless you have a right and left output. I have never heard of right and left output before for a subwoofer, but I guess there is always a possibility.

Is this a good choice for a center channel speaker?

It may work for you, depending on your speaker, the amp on other speakers, the other speakers, your set up (assuming you have something to feed a distinct center channel) and your room. I wouldn't. How many volume controls do you want to get up and mess with? If you're trying for a home theater setup, you'll be happier with Amazon's entry level Onkyo 5.2 system at $329. Use the speakers you have and upgrade as you can afford. On the other hand if this is a dorm room, go for it.

I have a powered subwoofer but need to combine left and right channels with a cross. will this conflict with my powered sub?

probably not a good fit with a powered sub unless you are replacing the amp in that sub.

can it handle a 12 inch sub 200watts?

It can drive the speaker, but how well will depend on the efficiency of the speaker and not just the size and watts it can handle.

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Douk Audio G4

Product ID: 353867969

Details

Manufacturer
Douk Audio
Maximum supply voltage
24 Volts (DC)
Minimum supply voltage
12 Volts
Mounting type
Freestanding
Voltage
12 Volts (DC)

🔊100W peak power output

🔌3.5mm AUX & RCA inputs for versatile connectivity

🎚️Dual B/M switch for full-frequency or subwoofer mode

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£63.67

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Description

🎧 Elevate your sound game with compact power and pure bass vibes!

COMPACT STYLISH - Sleek aluminum chassis fits perfectly on your desk or home HiFi system without sacrificing power.
POWERFUL 100 W OUTPUT - Drive your 3-12 inch speakers or subwoofers with crystal-clear, distortion-free sound.
DUAL MODE FLEXIBILITY - Switch effortlessly between full-frequency and subwoofer amplification to match your audio setup.
STEREO EXPANSION READY - Use 2 units independently for true left and right channel separation—no interference, just pure sound.
ULTRA LOW NOISE HIGH FIDELITY - NE5532 op-amps and TI TPA3116 chip ensure pristine audio with 0.001% THD and 103dB SNR.

The Douk Audio G4 is a compact, mono digital power amplifier delivering 100W of clean, distortion-free output. Featuring a versatile B/M switch, it supports both full-frequency and subwoofer modes, compatible with 3.5mm AUX and RCA inputs. Its advanced NE5532 and TI TPA3116 chip design ensures ultra-low noise and high fidelity, making it ideal for upgrading 2.0 audio systems to immersive 2.1 setups. The stylish aluminum build and stereo expansion capability make it a must-have for audiophiles seeking powerful, flexible sound in a sleek package.

Specifications

ASIN	B081Q3VZ9V
Brand	Douk Audio
Brand Name	Douk Audio
Customer Reviews	4.3 out of 5 stars 163 Reviews
Included Components	1G4 Mono Amplifier; 119V Power Supply; 1*Manual
Item Weight	240 Grams
Manufacturer	Douk Audio
Material Type	aluminum
Maximum Supply Voltage	24 Volts (DC)
Maximum supply voltage	24 Volts (DC)
Minimum Supply Voltage	12 Volts
Minimum supply voltage	12 Volts
Model	DZ078_US
Mounting Type	Freestanding
Mounting type	Freestanding
Number of Channels	1
Output Power	100 Watts
Package Type Name	box
Specification Met	Technical Specifications Met
Supply Current	4.74 Amps
Voltage	12 Volts (DC)

Reviews

A**M

Excellent little sub amplifier!!!

20.08.2024

O**P

Excelente para convertir un subwoofer pasivo en activo.

Tenía un equipo de sonido Onkyo con subwoofer pasivo, hace poco lo reemplacé por uno nuevo que sólo tiene salida para subwoofer activo, mi subwoofer anterior aún servía, así que decidí comprar este adaptador y funcionó a la perfección.

27.10.2024

T**N

Wow! Really good unit!

2.12.2020

A**R

An economy upgrade

24.10.2022

F**O

This little amp worked out great and sounds amazing.

29.01.2025

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