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Summary of Contents for Quantum Audio QA3X
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Page 1: Installation Instructions
QA3X 3-WAY ELECTRONIC CROSSOVER INSTALLATION INSTRUCTIONS OWNER’S MANUAL tel: (956) 428-4263 fax: (956) 421-4513 www.quantumaudio.net... - Page 2 The Quantum QA3X has the ability to accept one, two or three sets of RCA cables as an input. Both the front and rear outputs of the QA3X make use of a built-in 18dB per octave electronic crossover that is continuously variable from 32Hz to 8kHz.
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Page 3: Front Panel Controls
FRONT PANEL CONTROLS The top panel of the QA3X contains controls for the crossover and output levels as shown below. The QA3X includes the following features: 1. Front RCA Input 12. Ground Input Connector 2. Front Crossover Frequency Control 13. Battery +12V Input Connector 3. -
Page 4: Feature Description
•Remote Sub Level Control - When the remote sub level control is plugged into the QA3X, the sub output level control on the QA3X will be defeated. Instead the remote sub level control will set the sub output level. -
Page 5: Mounting Location
MOUNTING LOCATION The QA3X crossover can be mounted in any convenient location in your vehicle that allows access to the controls and is away from moisture. The flanges on the chassis have mounting holes which can be used as a template for screw holes. -
Page 6: Wiring Precautions
Read all wiring precautions. If you are not sure of the connections, contact your authorized Quantum Audio dealer. If you are using a source unit, without a remote turn-on lead, the QA3X can be turned on with a switched accessory lead. You can find this accessory power source in the factory harness at the back of the radio. -
Page 7: Power Connections
POWER CONNECTIONS 94.7 CAR BATTERY +12V RADIO'S REM OTE TURN-ON OUTPUT REAR RCA OUTPUT FRONT RCA INPUT REAR RCA INPUT www.quantumaudio.net... - Page 8 APPLICATIONS 2-Way System with Front and Rear Output In this illustration, the QA3X is configured for two channel input with dedicated amps for front speakers, rear speakers and subwoofer(s). 94.7 CAR BATTERY +12V RADIO'S REM OTE TURN-ON OUTPUT FRONT RCA IN...
- Page 9 APPLICATIONS 2-Way System with Front and Rear Output (Switch Configurations) FRONT RCA IN For 2 channel input, configure switches as shown FRONT RCA IN REAR RCA IN For 4 channel input with front and rear fade, configure switches as shown FRONT RCA IN REAR RCA IN For front and rear fade with...
- Page 10 APPLICATIONS 2-Way System with Front and Rear Output (Adjusting your System) After all the wiring connections are made and before the system is turned on for the first time, you need to make some basic adjustments. It is important that the High-Pass and Low-Pass Frequency Controls are set correctly before turning on the system for the first time.
- Page 11 5. Fine tune the bass response using the Sub Boost Controls. 6. Plug the Remote Sub Level Control cable back into the QA3X crossover. Setting the Sub Boost Level 1.
- Page 12 APPLICATIONS 3-Way System In this illustration, the QA3X is configured for single channel input with dedicated amplifiers for tweeters, midranges, and subwoofer(s). 94.7 CAR BATTERY +12V RADIO'S REM OTE TURN-ON OUTPUT FRONT RCA IN HIGH RCA OUT MID RCA OUT...
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Page 13: Way System
1. Be sure the front and rear High-Pass crossovers are set properly NOTE: When the QA3X is used in a 3-way system, the front outputs must be connected to the tweeter, amplifier, and the rear outputs must be connected to the midrange amplifier. - Page 14 5. Fine tune the bass response using the Sub Boost Controls. 6. Plug the Remote Sub Level Control cable back into the QA3X crossover . Setting the Sub Boost Level 1.
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Page 15: Troubleshooting
Swap the left and right speaker connections at the output of the High-Pass amplifier. If the problem trades sides in the vehicle, then the amplifier is defective. If the problem stays on the same side, then the speaker or speaker wiring is defective. QA3X SPECIFICATIONS Power Source: 14.4 Volts DC Input Current: 0.5 Amp Max... - Page 16 Tel : 956-428-4263 Fax : 956-421-4513 www.quantumaudio.net...
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