GZUA 2225SQ - Car stereo Ground Zero - Free user manual and instructions

USER MANUAL GZUA 2225SQ Ground Zero

Please read before Installation Thank you for selecting a Ground Zero SQ (Sound Quality) Amplifier. We are providing a helpful hints list wich should keep you from Experiencing unnecessary shut down.

• Sound Quality Level with high quality parts

GROUND ZERO Mobile EntertainmentIntroduction Amplifiers provide high-performance sound reinforcement for your mobile audio equipment. It’s versatility enables compatability with optional Equalizer, Frequency Dividing Network Crossovers and other audio processors in a customized system. The Multi-Mode bridging capabilitis allow felxibility in hosting several differnet speaker configurations. To achieve optimum performance , it is highly recommend that you read this Owners manual before the installation.

Tools and materials you need

• 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!)

• Do not drill holes into the tank, the brake pipe, wires or other important parts of the vehicle

• Never pass wires over sharp angles. It is reccomended to buffer the power supply of the amplifier with an capacitor min. 1 Farad. WARNING High powered audio systems in a vehicle are capable of generating „Live Concert“ high 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 sound such as; horns, warning signals,or emergency vehicles, thus constituting to a potential traffic hazard. In the interest of safetay, 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 da equate space is left, and cooling requirements are met. b)If your radio/source is equipped with Pre-Amp outputs, it is recomended to utilize them to drive the amplifier c) Are your components matched? The peak power rating of your speakers must be greater than the Amplifiers.They also must be 2-8 Ohms impedance (This information os normally printed on the speaker magnet) Consider both the length of your leads, and routing when chosing the mounting location. Pre-Amp input jacks require a length of high quality shielded male to male RCA patch cord. Mounting your amplifier a) Select a suitable location that is convenient for mounting, accessible for wiring and has enough room for air circulation and cooling. b) Use the amplifier as a template to mark the mounting holes, remove the amplifier and drill 4 holes, use extreme caution, inspect underneath surface before drilling. Wiring connection Attention! mind. 20mm² wires are necessary for power connection 1.) Ground: Ground connection should be passed directly to the car body as short as possible (max. 1m) 2.) +12 Volt: Power connection should be passed directly to the battery. Please pay attention on a correct fuse protection of the installation with an Inline device with a max. wire length to the battery of 30 cm. 3.) Remote turn on: This connection is getting connected with the remote control line of the radio. It is used for turning on and off the amplifier. Warning Investigate the layout of you automobile thoroughly before drilling or cutting any holes. Take care when you work near the thanks, lines, or hydraulic lines, and electrical wiring. Don’t mount this system so that wire connections are unprotected or are subject to pinching or damage from nearby objects. The +12 Volt DC power wire must be fused at the battery positive terminal connection. Before making or breaking power connections at this system power terminals, disconnect the +12 Volt wire at the battery end. Confirm your radio / cassette player and / or other equip, mount is turned off while connecting the input jacks and speaker terminals. 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.Connections and adjustments Adjustments: All adjustments of the Ground Zero SQ-Serie are located under the upper aluminium cover in the middle. All screws have to be released.

Connections and adjustments GZUA 4125SQ, GZUA 2125SQ, GZUA 2225SQ Adjustments GAIN............................. here, the Input Level Sensitivity 250mV - 8V is adjusted HPF FREQ...................... X-over ( you hear everything from e.g. 20 Hz up) LPF FREQ........................ X-over (you hear everything till e.g. 200Hz down) BPF............................... Band-pass filter for a certain area of frequency from-to (you hear everything from 100 Hz to 2000 Hz) Q-Factor........................ adjusting the Q of the filter SUBSONIC..................... F ilter for the lowest, not hearable frequencies FLAT.............................. switch setting for recording every Frequenc X1 ................................. switch setting the filter HPF/LPF x1 20 Hz – 400 Hz range X10................................ switch setting the filter HPF/LPF x10 200 Hz – 4 Khz range Balanced / Unbalanced Functionality The Ground Zero SQ Series have the possibility to clear disturbing noises, that creep on the wire to the amplifier (dynamo-whistling, etc). A especial technology, is used for this. The optional circuit of the Cinch inputs is symmetric and asymmetric. Application BAL / UNBAL All switches are switched symmetricly on „BAL“ in the delivery status. If there are disturbances after the installation, you can turn the switches to „UNBAL“ to clear the disturbances. If there are still disturbances,please contact your dealer.

Connections and adjustments

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

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

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

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 damagedSpecifications