DOUK AUDIO G3 - User Manual

1. Please make sure the power knob shutdown before you connect
G3/G5 to power supply, avoid generating electric sparks although
this is normal without any security issues.
2. Default OPTIONAL 19V power supply enough to drive most home
speakers. If you buy the version without power supply or want
higher output, please prepare high-quality power supply by
yourself. Powered by 24V power supply(4Ω load), the actual
output power can reach 100W.
3. Before turning on the amp, please make sure the volume knob
at the leftmost end, avoid high volume ( high output power )
damaging your speakers.
4. Noise may be caused by poor audio cables, sound sources,
speakers, speaker cables, interference sources, poor contacts
and the device itself. How to determine the reason: 1) remove
all input cables and make sure no interference sources around
such as routers; 2) connect the amp to speakers; 3) connect the
amp to power supply correctly and turn on the amp; 4) if noise
G3/G5 100W Bluetooth
Digital Stereo Power Amplifier
NOTICE
PARAMETERS
1
Model
Treble and Bass Control
Audio input
Audio output
Max output power
Power amp chip
Op amp
Speaker impedance
Matched loudspeakers
Frequency response
THD
SNR
Working Voltage
Default power supply(optional)
Dimensions(L*W*H)
Net Weight
3.5mm AUX & Bluetooth
Banana speaker jacks
100W(24V, 4Ω load)
TPA3116
4-8Ω
3-8 inch 10-150W
DC12-24V (5.5mm / 2.5mm)
19V
105 x 85 x 30mm / 4.13 x 3.35 x 1.18in
260g / 0.57lb
18Hz-25KHz
0.002%(1KHz)
101dB
3*TL072
G3
Yes
G5
No
2*TL072
20Hz-22KHz
0.001%(1KHz)
103dB
2
exists, then problem may be the amp, power supply, speakers
or speaker cables. Please use another speaker, speaker cables
or power supply to check one by one for further determination; 5)
if no noise, please use other audio cables or audio sources for
further determination.

Summary

Important Operational Notices

Power Connection Safety

Ensure power knob is off before connecting to power supply to avoid electrical sparks.

Power Supply and Output Power

Use 19V supply for most speakers; 24V supply yields 100W output with a 4Ω load.

Volume Control Before Operation

Set the volume knob to the leftmost end before turning on the amp to prevent speaker damage.

Troubleshooting Noise Issues

Steps to identify and resolve noise caused by cables, sources, or device interference.

How to Use the Amplifier

Connecting Power and Speakers

Connect the power adapter, then plug in the cord, and connect passive speakers to the output.

Wired Audio Input (3.5 mm AUX)

Turn on amp, connect audio device via 3.5mm cable after power indicator is steady.

Wireless Audio Input (Bluetooth)

Turn on amp, search for Bluetooth on phone, and connect to the amplifier successfully.

Adjusting Volume and Tone

Rotate knob for volume, adjust treble/bass (G3 version only) for HiFi music.

Contact Information

DOUK AUDIO G3 Specifications

General

Impedance	4-8Ω
Frequency Response	20Hz-20kHz
Bluetooth Version	5.0
OP AMP Chip	NE5532
Chipset	TPA3116D2
Power Input	DC 12-24V
Audio Input	Bluetooth
Audio Output	Speaker Output
Power Supply	DC adapter
Power Output	100W (50W x 2)