Ground Zero Mobile Entertainment HYDROGEN GZHA 2250XII Mode D'emploi page 12

Controls and functions
1 Speaker terminals For connection of the speakers
GND -> Ground connection
Power terminals
2 REM -> Remote antenna terminal
BATT -> +12 Volt
BLUE – OK
3 Satus indication
RED – Error
Terminal for connection of the RCA wires.
4 Cinch inputs
To avoid failure, please use high quality RCA wires.
5 Input level controller With this controller you can adjust the input sensitivity.
Bass boost controller
6 For adjusting of the bass boost level in the range from 0 to +12 dB.
(GZHA 2250XII)
Bass frequency controller
7 For adjusting of the bass boost frequency in a range from 30 to 80 Hz.
(GZHA 2250XII)
Set the filter switch to „HIGH" position.
High pass controller
Adjust the variable HPF crossover frequency to the desired frequency
8 (Subsonic for GZHA 2250XII
using the controller. All frequency between 5 and 3000 Hz will be
and CH 3+4 GZHA 4120XII)
reproduced.
Adjust the crossover for the chosen utilization.
LPF – Only bass frequencies (below 30Hz - 250Hz) will be reproduced.
FULL – All frequencies will be reproduced.
HPF – Only middle and high frequencies (over 40 Hz – 3 KHz) will be
reproduced.
9 Mode switch
GZHA 2250XII / GZHA 4120XII CH 3+4:
At LPF adjustment, also the Highpass (Subsonic) is activated.
This equals a Bandpass filter of 5 – 250 Hz.
GZHA 4120XII CH 1+2
The Lowpass filter is not adjustable. It is fixed at 80 Hz.
For subwoofer and Kickwoofer operation -
Only frequencies from 30 Hz to 250 Hz will be reproduced (depending
on the LPF filter controller position). Set the filter switch to „LOW"
position. Adjust the variable LPF frequency to the desired frequency
10 Low pass controller using the controller.
GZHA 2250XII / GZHA 4120XII CH 3+4:
At LPF adjustment, also the Highpass (Subsonic) is activated.
This equals a Bandpass filter of 5 – 250 Hz.
Phase shift controller This controller allows you to fit the subwoofer channel in-phase to the
11
(GZHA 2250XII / 4120XII) front system.
12 Remote control input For connection of the bass remote control.
Cinch outputs
13 For fullrange operation of an additional amplifier.
(GZHA 4120XII)
7
All manuals and user guides at all-guides.com
Turning on the amplifier
The amplifier automatically turns on a few seconds after you turn on your radio.
Note: Your amplifier temporarily shuts down if it gets too hot, then restarts automatically once it cools
(At about 80° / 176° F).
Adjusting the audio level
Connecting the speaker for trimode operation - notes
TRI MODE operation output allows a subwoofer to be operated in mono mode while the main speakers are
playing in stereo. Leave the crossover switch on "Full" position.
Use 100 volt, non-polar capacitors for a high pass crossover to filter out low frequencies and Air- core or
Ferrit- ore coils with a minimum diameter of 1 mm / 0.039" for the lowpass crossover to filter out high
frequencies.
The capacitor and inductor values as written in the below table. The front and rear channels of this amplifier get
this capability. Only the rear left and right channels are shown on the following pictures.
1. LEVEL (Min/Max): Turn fully counter- clockwise to MIN position
2. Turn the auto sound system's volume control to about two-third
3. Adjust LEVEL to a comfortable listening level.
Values for 6dB passive crossover
Frequency Inductor
80 Hz 7,5 mH
100 Hz 6,5 mH
120 Hz 5,5 mH
150 Hz 4 mH
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of its full range.
Capacitor
470 uF
330 uF
370 uF
220 uF