DOUK AUDIO G4 User manual

1. Please make sure the power knob shutdown before you connect
G4 to power supply, avoid generating electric sparks although
this is normal. And make sure you have chosen correct mode
(Full-frequency or Subwoofer) before playing music.
2. Default 19V power supply enough to drive most home speakers,
if you want higher output please prepare another larger power
supply by yourself.
3. The best matched full-frequency or crossover speaker is 3-10
inch / 10-200W and best matched subwoofer speaker is 4-12
inch / 40-200W.
G4 Mini Mono Subwoofer /
Full-frequency Power Amplifier
NOTICE
1. Connect the amp to power adapter firstly and then plug the power
cord to the socket.
2. Connect passive full-frequency speaker or subwoofer speaker to
the banana speaker jacks, and connect audio source to 3.5mm
AUX or RCA input according to different device such as phone,
computer, TV, CD player, decoders and so on.
3. Switch the B/M selector correctly, B means G4 as subwoofer amp
and M means G4 as full-frequency amp.
4. Rotate the knob to turn it on, play music on your audio source
device and adjust proper volume to enjoy its HiFi sound.
HOW TO USE
Address: Room 1329, Wang Cheng Building, Long Guan street,
Long Hua new District, Shenzhen, Guang Dong, China
Contact: LIU CHENXI
Tel: [phone]
Email: [email protected]
CONTACT INFORMATION
PARAMETERS
1
Brand
Audio input
Audio output
Rated power
Peak power
THD
SNR
Speaker impedance
Matched full-frequency speaker
Matched subwoofer speaker
Frequency range
Working voltage
Douk Audio
3.5mm AUX / RCA
banana speaker jacks
100W
300W
0.001%
103dB
4-8Ω
3-10 inch / 10-200W
4-12 inch / 40-200W
DC 12-24V 5.5mm (-) / 2.5mm (+)
20-200Hz(Subwoofer ) /
20-20Khz(Full-frequency)
2

3
TROUBLE-SHOOTING MANUAL
Problems
Cannot start up
Exceed rated
output power
Power switch isn't
pressed or toggled
Audio source isn't
connected or mute
Use another power
adapter to check out
Connect power
adapter or restart
Power adapter isn't
connected
Power adapter
is broken
Connect audio source
or turn up volume
Check output or change
matched speaker
Change high-quality
power adapter
Change shielded audio/
speaker cables
Use your player of
mobile phone to test
Change high-quality
matched speakers
Search correct
Blueototh Name
Disconnect all device a
nd turn off Bluetooth
Turn down the volume
of amp/preamp/source
Disconnect all device
and turn off Bluetooth
Volume of amp is
adjusted to minimum
Output shorted or
speaker isn't matched
Search and click wrong
Bluetooth Name
Bluetooth has been
paired by other device
Bluetooth input is prior
and has been paired
Output power
exceeds rated output
Press or toggle
power switch
Bluetooth
can't connect
Stop working
after a while
LINE input
can't connect
Distortion
Noise
No sound output
SolutionsReasons
Turn up volume Choose
correct input mode
Poor power adapter
Poor cables
Poor audio source
Poor speakers
Select incorrect
input mode
Turn down the
volume of amp
How to build stereo audio system
2/3*G4
1*G4
1*G4
4