Ground Zero GZNA 2850XII Owner'S Manual Download Page 5

Controls and functions  

 

Power terminals 

GND -> Ground connection  
REM -> Remote antenna terminal 
BATT -> +12 Volt 

Speaker terminals 

For connection of the speakers 

Satus indication 

BLUE – OK 

RED – Error 

Cinch ( RCA ) inputs 

Terminal for connection of the RCA wires.  

To avoid failure, please use high quality RCA wires.  

Input level controller 

With this controller you can adjust the input sensitivity. 

Bass boost controller 

For adjusting of the bass boost level in the range from 0 to +12 dB. 

Bass frequency controller  

For adjusting of the bass boost frequency in a range  
from 30Hz to 80Hz. 

High pass controller 
(Subsonic) 

Set the filter switch to „HIGH“ position. 
Adjust the variable Highpass crossover frequency to the desired frequency 
using the controller. All frequency between 5Hz and 4000Hz will be 
reproduced. 
 
HPF X1/X10 Switch: 

X1 – Adjustment range 5Hz – 400Hz 
X10 – Adjustment range 50Hz – 4000Hz 

Mode switch

 

Adjust the crossover for the chosen utilization. 
LOW (Bandpass) – Only bass frequencies (below 30Hz - 4000Hz) will be 
reproduced. In this adjustment the Highpass (Subsonic) is also activated. 
FULL – All frequencies will be reproduced. 
HIGH (Subsonic) – Only middle and high frequencies  
(over 5Hz – 4000Hz) will be reproduced. 

10 

Low pass controller 

For subwoofer and Kickwoofer operation -  
Only frequencies from 30Hz to 4000Hz will be reproduced (depending on 
the lowpass filter controller position). Set the filter switch to „LOW“ 
position. Adjust the variable Lowpass frequency to the desired frequency 
using the controller. 
 
LPF X1/X10 Switch: 
X1 – Adjustment range 30Hz – 400Hz 
X10 – Adjustment range 300Hz – 4000Hz 

11 

Phase shift controller  

This controller allows you to fit the subwoofer channel in-phase to the front 
system. 

12 

Remote control input 

For connection of the bass remote control. 

 
 

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  

 

1.

 

LEVEL (Min/Max): Turn fully counter- clockwise to MIN position 

2.

 

Turn the auto sound system's volume control to 

about two-third

 of its full range. 

3.

 

Adjust LEVEL to a comfortable listening level. 

 
 
 
 

 
 
 

 

 

 

Summary of Contents for GZNA 2850XII

Page 1: ...pply SMD Technology Power Protection indicator Variable 12dB Bass Boost High pass filter Subsonic filter with 1 10 switch variable to 4000Hz Low pass filter with 1 10 switch variable to 4000Hz Variable phase shift 0 180 Adjustable input sensitivity Soft delayed remote turn on Remote control Thermal Short Overload protection ...

Page 2: ...rest of safety Consumer Electronics recommends listening at lower volume levels while driving Planning your system Before beginning the installation consider the following a If you plan to expand your system by adding other components sometime in the future ensure adequate space is left and cooling requirements are met b If your radio source is equipped with pre amp outputs it is possible to utili...

Page 3: ...Power connection 3 ...

Page 4: ...Controls and functions 4 ...

Page 5: ...ill be reproduced In this adjustment the Highpass Subsonic is also activated FULL All frequencies will be reproduced HIGH Subsonic Only middle and high frequencies over 5Hz 4000Hz will be reproduced 10 Low pass controller For subwoofer and Kickwoofer operation Only frequencies from 30Hz to 4000Hz will be reproduced depending on the lowpass filter controller position Set the filter switch to LOW po...

Page 6: ...Connecting the speaker 6 ...

Page 7: ...ter 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 Values for 6dB passive crossover Frequency I...

Page 8: ... Power 2Ω bridged CEA Standard CEA 2006 A 1 x 2600W 1 THD N 1 x 3000W 10 THD N Damping factor 150 Signal to noise Ratio 90 dB Lowpass 30 400 Hz 300 4000 Hz Highpass 5 400 Hz 50 4000 Hz Bandpass 5 Hz 4000 Hz Subsonic filter 5 Hz 4000 Hz Bass boost 0 12 dB Bass boost frequency 30 Hz 80 Hz Phase shift 0 180 Frequency response 5 Hz 38 KHz 1 dB Input sensitivity 200 mV 9 V 5 Bass remote At Lowpass oper...

Page 9: ...orzunehmen ohne den Kunden darüber zu informieren Limited warranty defective products must be returned in original packaging please add a copy of the original purchasing invoice showing the purchasing date and a detailed description of the failure Failure caused by overload misuse or by using the product for competition purpose are not covered by the warranty We reserve the right to make needed ch...

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