GZTA 5120X - Car stereo Ground Zero - Free user manual and instructions

USER MANUAL GZTA 5120X Ground Zero

Thank you for selecting a Ground Zero amplifier. We are providing a helpful hints list which should keep you from experiencing unnecessary shut down. Have fun with this high quality Titanium product. Features

• As a precaution it is advisable to disconnect the vehicle’s battery before making connection to the +12 Volts supply wiring (see owner’s manual of your car for further information).

• Please use great caution drilling your trunk. Your gas tank and brake lines can be damaged by puncturing with your drill bit – this could cause damage or failure of your cars operating systems.

• Never pass wires over sharp angles. It is recommended to buffer the power supply of the amplifier with an capacitor min. 1 Farad to guarantee a stable operation voltage. WARNING ! High powered audio systems in a vehicle are capable of generating "Live Concert" levels of sound pressure. Continued exposure to excessively high volume sound levels may cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio equipment at high volume levels may impair your ability to hear external sounds such as; horns, warning signals, or emergency vehicles, thus constituting to a potential traffic hazard. In the interest 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 utilize them to drive the amplifier and connecting (amplifier) to the 2 rear speakers. Mounting your amplifier

a. Select a suitable location that is convenient for mounting, is accessible for wiring and has ample room for air circulation and cooling. b. Use the amplifier as a template to mark the mounting holes, remove the amplifier Warning Chose a mounting position where all eclectic wires are protected from being damaged by sharp edges, heat or other conditions. +12Volt DC electrical connections must be fused on the battery side. Make sure your radio and all other devices will be turned off while connection your system. If you need to replace the power fuse, replace it only with a fuse identical to that supplied with the system. Using a fuse of different type or rating may result in damage to this system which isn’t covered by the warranty.

Controls and functions 1 Speaker terminals For connection of the speakers

With this controller you can adjust the input sensitivity. 6 Mode switch

djust the crossover for the chosen utilization. LPF – Only bass frequencies (below 40Hz - 4000Hz) (G ZTA 5120X Channel 5: 40Hz – 250Hz) will be reproduced. FULL – All frequencies will be reproduced. HPF – Only middle and high frequencies ( GZTA 5125X : over 5 Hz – 4000 Hz / GZTA 5120X : over 40 Hz – 4000 Hz ) will be reproduced. GZTA 5125X: At LPF adjustment, also the Highpass (Subsonic) is activated. This equals a Bandpass filter of 5 – 4000 Hz. 7 Low pass controller Only frequencies from 40 Hz to 4000 Hz ( GZTA 5120X Channel 5: 40 Hz – 250 Hz) will be reproduced (depending on the LPF filter controller position). Set the filter switch to „LOW“ (“LP”) position. Adjust the variable LPF frequency to the desired frequency using the controller.

High Pass controller (Subsonic) Set the filter switch to „HIGH“ position. Adjust the variable HPF crossover frequency to the desired frequency using the controller. All frequency between 5 and 4000 Hz ( GZTA 5120X : 40 Hz – 4000 Hz) will be reproduced. 9 Filter controller Depeding on the mode switch position, High- or Lowpassfilter can be adjusted in a range from 40 Hz – 4000 Hz with this controller.

Subsonic controller (GZTA 5120X Channel 5) For adjusting the subsonic filter in a range from 10 Hz to 50 Hz. 11 Input mode switch This switch allows you to choose the number of used cinch inputs.

6 channels of GZTA 5125X can be operated with a 2- channel Cinch cable. You can chose if the 5

channel of GZTA 5120X should be operated with Cinch input 5/6 or the summation of input 1/2/3/4. 12 Phase Shift controller This controller allows you to fit the subwoofer channel of GZTA 5120X in-phase to the front system. 14 Remote control input For connection of the bass remote control.

Input Mode GZTA 5125X 2: This adjustment allows you to operate all 6 channels using the Cinch- Input Ch 1 and Ch 2. This is recommended for active operation of a 3 way front system. For using this possibility, connect for example the front cinch output of your headunit to the Ch 1/2 of the amplifier. 4: The channels 5 and 6 will be operated using the summarized signal from channel 1/2 and 3/4. This mode is suggestive if channel 5 and 6 are only used as subwoofer channels. For using this possibility, connect for example the front and rear cinch output of your headunit to the Ch 1/2 and Ch 3/4 of the amplifier. 6: This adjustment allows you to operate every channel with an own signal. Using this possibility, every channel can be adjusted by your head unit or processor separately.7

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.

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.

Model GZTA 5120X GZTA 5125X Type 5 Channel Class A/B 6 Channel Class A/B RMS Power @ 4 Ω CEA Standard CEA-2006-A 4 x 50 W & 1 x 180 W (1% THD+N) 4 x 60 W & 2 x 120 W (1% THD+N) RMS Power @ 2 Ω CEA Standard CEA-2006-A 4 x 70 W & 1 x 260 W (1% THD+N) 4 x 80 W & 2 x 180 W (1% THD+N) RMS Power @ 4Ω Bridged CEA Standard CEA-2006-A (1% THD+N) 2 x 130 W (Channel 1 – 4) 2 x 160 W (Channel 1 – 4) & 1 x 360 W (Channel 5 – 6) RMS Power @ 4Ω Bridged CEA Standard CEA-2006-A (10% THD+N) 2 x 170 W (Channel 1 – 4) 2 x 190 W (Channel 1 – 4) & 1 x 420 W (Channel 5 – 6) Damping factor > 100 Signal to noise Ratio > 75 dB Lowpass 40 Hz – 4000 Hz (Channel 1 – 4) & 40 – 250 Hz (Channel 5) 40 Hz – 4000 Hz Highpass 40 Hz – 4000 Hz (Channel 1 – 4) 5 Hz – 4000 Hz Subsonic filter 10 Hz – 50 Hz (Channel 5) 5 Hz – 4000 Hz Bandpass filter 10 Hz – 250 Hz (Channel 5) 5 Hz – 4000 Hz Phaseshift - 0° – 180° (Channel 5 – 6) Frequency response 5 Hz – 38 KHz (± 1 dB) Input sensitivity 200 mV – 9 V (± 5%) THD < 0,1 % < 0,1 % Bass remote control

Trouble shooting guide Symptoms Check Points Cure No sound Is the POWER LED illuminated? Check fuses in amplifier. Be sure remote lead is connected. Check signal leads. Check again control. Check tuner/deck volume level. Is the diagnostic LED illuminated? Check for speaker short or amplifier overheating Amp not switching on No power to the amplifier Check power wire or connections No power to remote wire with receiver on Check connections to radio No sound in one channel Check speaker leads Inspect for short circuit or an open connection Check audio leads Reverse left and right RCA inputs to determine if it is occurring before the amp Amp turning off at medium / high volume Check speaker load impedance Be sure proper speaker load impedance recommendations are observed (If you use an ohm meter to check speaker resistance, please remember that DC resistance and AC impedance may not be the same.) Protection LED is on Temperature shut down Turn radio volume down Speaker wires short Separate speaker wires and insulate

Control High Pass (Subsonic)