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Ground zero GZUA 4125SQ Manual

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Connections and adjustments
FRONT INPUT................. Cinch connection for Front Input
REAR INPUT..................Cinch connection for Rear Input
MONO OUTPUT............... Cinch connection for Mono Output (e.g. for more subwoofer amplifiers)
UNBAL........................... Switch for asymmetrical Input
BAL............................... Switch for symmetrical Input
FRONT / R-ch................. Speaker Front Output / Right channel
REAR / L-ch....................Speaker Rear Output / Left channel
REMOTE........................ bass remote control connection(GZUA 2225SQ)
GZUA 4125SQ
GZUA 2125SQ / GZUA 2250SQ
POWER......................... Operation Blue – Device is turned ON
PROT............................ Protection Red – Device is in protection circuit
FUSE............................. Fuse holder amp fuse
+12V.............................. + 12 Volt Connection Connection for the power wire from the battery
REM.............................. + Remote Connection Connection for the remote wire from car radio
GND.............................. Ground Connection Connection for Ground wire
GZUA 4125SQ
GZUA 2125SQ GZUA 2250SQ
Adujstment and Tuning
The amplifier automatically turns on a few seconds after you turn your vehicle’s ignitions switch to ACC or ON or
turn on your auto sound system, depending on how you wired the system.
Your amplifier temporarily shuts down if it gets too hot, then restarts automatically once it cools down.
For the best performance of the amplifier, the Input level sensitivity has to be adjusted correctly (8V-250V)
Adjustment of the GAIN Input Level sensitivity (8V-250mV)
For the best performance, you must set LEVEL(MIN/MAX) on the Top of the amplifier to adjust the level of the
audio signals.
1. Use a screwdriver o turn LEVEL(MIN/MAX) fully to MIN
2. Turn the auto sound system’s volume control to about two-third of its full range.
3. Adjust LEVEL(MIN/MAX) to a comfortable listening level
4. Turn up the auto sound system’s volume control until the sound beginns to distort. Then
immediately turn the volume down to a point just before where the distortion began.
Caution: Never up turn the auto sound system’s volume control more than needed to adjust the
audio level, more than thirds of its maximum volume.
5. 5.Adjust LEVEL(MIN/MAX) until the sound is at the maximum level you want the amplifier two
produce.
6. Adjust the auto sound system’s volume control to a comfortable listening level.
Attention!
Please note that the gage on a CD, that reproduces music with a higher dynamic is essential higher as on Radio
reception.
With the bass remote control, you can readjust the Bass gain from the driver’s seat. (GZUA 2225SQ).
If something doesn’t work
Problem Control Help
No Sound
Is the PWR LED on?
Check fuse
Check remote wire
Check +12Volt
Check ground
Is the PROT LED on?
Short circuit on speaker
Device overheated
Device defective
No Sound
Check fuse
Check +12Volt
Check ground
No Sound No voltage on Remote Check Remote on radio
Amplifier is turning
off at higher volume
Check speaker Impendance
Check if the on LS terminal in min of 2Ω
resistance(GZUA 4125SQ, 2125SQ)
Check if the resistor on LS terminal 1Ω
(GZUA 2225SQ) .
No sound at one
channel
Check cinch / speaker wire Wire/ connector damaged
… 9 …


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