MOSFET POWER AMPLIFIERS Installation Instructions / Owner's Manual QS1500D QS2150 QS2250 QS4150 QS4250 Tel : 956-428-4263 Fax : 956-421-4513 www.quantumaudio.
INTRODUCTION Congratulations on your purchase of a QUANTUM AUDIO state-of-the-art power amplifier. Your selection of a QUANTUM AUDIO product indicates a true appreciation of fine musical reproduction. Whether adding to an existing system or including your Quantum amplifier in a new system, you are certain to notice immediate performance benefits. KEEP YOUR SALES RECEIPT Take this time to attach your sales receipt to the manual and put in a safe place.
SAFETY PRECAUTIONS Fuse amplifiers power wire at the battery. Be sure to fuse the power wire within 12” of the car's battery. This will protect the car's battery in case of a short circuit between the power amplifier and battery. THIS IS A MUST, the amplifier's built-in fuse will only protect the power amplifier not the car's battery! Use high grade wire connectors.
FEATURES AND BENEFITS DC Offset Protection This circuit protects the output of the amplifier against DC voltage. If for some reason DC voltage is detected at the output stage, the amplifier will shut down protecting the speakers from direct current. Short Circuit Protection The circuit protects the amplifier from damage due to a short found in the speakers or wiring. If one of the speakers or its wiring comes in contact with ground, the amplifier will shut down.
Line Out One set of full range line outputs have been provided for convenient connection to additional amplifiers in the system. Power Fusing This protects the amplifier against short circuits and excessive current. Remote Turn-on Automatically turns amplifier on when connected to the head unit's remote output. The amplifier will turn on and off with the head unit to save current consumption. This control also operates the reset circuit for the amplifier's protection.
MOUNTING LOCATION Before you start the installation, it will be necessary to find a mounting location for the amplifier. Find a location in which the amplifier will receive adequate ventilation in order to dissipate the heat it develops during operation. Two popular mounting locations are in the trunk or under the seat. Select the location in which you wish to mount the amplifier.
POWER CONNECTIONS POWER INPUT FUSE SPEAKER OUTPUT R POWER PROTECT GND REM +12V RADIO'S REMOTE TURN-ON OUTPUT L BRIDGED IN-LINE POWER FUSE MOUNTED WITHIN 12" FROM BATTERY RECOMMENDED (NOT PROVIDED) - + CAR BATTERY +12V 94.7 IMPORTANT! Before making any connections, disconnect the car’s battery until the installation is completed to avoid possible damage to the electrical system. Connect the amplifier to the car's battery.
SIGNAL & SPEAKER CONNECTIONS Connect the RCA output of the head unit (AM/FM cassette player, CD, or DAT) to the RCA input terminals of the amplifier. To make these connections, we recommend high quality RCA cables, which are available at your local car audio retailer. Run signal wires away from electrical wires to avoid possibility of induced noise from the car's electrical system (i.e. popping noises or engine noise).
QS2150 & QS2250 CONNECTIONS (MONO MODE) In this example we have selected LPF (Low Pass Filter) for our XOVER. Adjust the LPF (Low Pass Frequency) to desired crossover point for your speakers Set the “MODE” switch to the MONO position. + - GND - + line lpf L HI INPUT L 5v .2v LEVEL R R 0dB 12dB BASS EQ 60Hz 1.2KHz HPF full hpf MONO STEREO X-over Mode 30Hz 250Hz LPF output input L R Optional full range line out connection to additional amplifiers in the system.
QS4150 & QS4250 CONNECTIONS (4 CHANNEL MODE) In this example we have selected HPF (High Pass Filter) for our XOVER. Adjust the HPF (High Pass Frequency) to desired crossover point for your speakers + - GND - + R LEVEL BASS EQ HPF 0dB 12dB 60Hz 1.2KHz Set the “MODE” switch to the 4 channel position. LPF X-OVER full hpf ch3 ch4 HI INPUT 5v .2v lpf 30Hz 250Hz R 234 full hpf ch1 ch2 L L ch3-4 ch1-2 LINE INPUT + - GND - + 5v .2v 0dB 12dB 60Hz 1.
QS4150 & QS4250 CONNECTIONS (3 CHANNEL MODE) Adjust the LPF (Low Pass Frequency) to desired crossover point for your subwoofer In this example we have selected HPF (High Pass Filter) for our front channels. In this example we have selected LPF (Low Pass Filter) for our bridged channel. Adjust the HPF (High Pass Frequency) to desired crossover point for your speakers + - GND - + R LEVEL Set the “MODE” switch to the 3 channel position. BASS EQ HPF 0dB 12dB 60Hz 1.
QS4150 & QS4250 CONNECTIONS (2 CHANNEL MODE) In this example we have selected LPF (Low Pass Filter) for our XOVER. Adjust the LPF (Low Pass Frequency) to desired crossover point for your speakers + - GND - + R LEVEL BASS EQ HPF 0dB 12dB 60Hz 1.2KHz Set the “MODE” switch to the 2 channel position. LPF X-OVER full hpf ch3 ch4 HI INPUT 5v .2v 30Hz 250Hz lpf R 234 full hpf ch1 ch2 L L ch3-4 ch1-2 LINE INPUT + - GND - + 5v .2v 0dB 12dB 60Hz 1.
QS1500D CONNECTIONS POWER BASS BOOST SUB SONIC LOW PASS 0dB 12dB 15Hz 55Hz LEVEL OUTPUT INPUT L L PROTECT REMOTE CONTROL 40Hz 150Hz 5v 0.2v R R Optional full range line out connection to additional amplifiers in the system.
HIGH LEVEL CONNECTIONS (OPTIONAL) High Level inputs have been included to connect the amplifier to a radio without low-level outputs (i.e. factory radio). This connection will allow you to connect directly to the speaker output of the radio with out the need of an external adapter. Determine the type of radio you have and make one of the following connections. CAUTION! Before making any connections determine the type of radio to avoid possible damage to amplifier and/or radio.
+ - GND - + R BASS EQ HPF 0dB 12dB 60Hz 1.2KHz LEVEL LPF X-OVER full hpf ch3 ch4 HI INPUT 5v .2v ch3-4 ch1-2 LINE INPUT lpf 30Hz 250Hz 234 full hpf ch1 ch2 L 5v .2v + - GND - + 0dB 12dB 60Hz 1.2KHz lpf 30Hz 250Hz MODE OUTPUT 94.
REMOTE BASS CONTROL MODULE (QS1500D) Before connecting the remote, it will be necessary to find a mounting location that will be easy to access for adjustment. Once you select your mounting location, you will need to run the control wire from the remote to the amplifier. To avoid possibility of induced noise from the car's electrical system (i.e. popping noises or engine noise), run the cable from the remote to the amplifier away from the car's electrical wiring.
ADJUSTING THE CROSSOVER AND BASS . The SOLAR series amplifiers are equipped with a built-in variable crossover network allowing you to select the crossover type (i.e. Low-Pass or High-Pass) and the desired crossover point. For example if you wish to drive a pair of subwoofers, you can select the “Low Pass” setting on the amplifier to filter out high frequencies. This will send only low frequencies to your subwoofers (see example settings below).
TROUBLE SHOOTING THE SYSTEM We have put together this trouble-shooting guide if you experience problems after installing the amplifier. Please keep in mind that the majority of problems incurred are caused by improper installation and not the equipment itself. In addition, there are many components in the system that could cause various signal problems such as inducted electrical noise and engine noise.
SPECIFICATIONS QS2150 Dynamic Power Output Power @ 14.4 VDC : 4 ohm 2 ohm Bridged 4 ohm Frequency Response S/N Ratio (A-weight) THD with 80k filter Low Input Level Battery Voltage Range Crossover Type Low Pass Crossover Frequency High Pass Crossover Frequency Crossover Slope Bass EQ Subsonic Filter Amplifier Fuse & Holder Size (L x W x H) Dynamic Power Output Power @ 14.
LIMITED WARRANTY Quantum Audio warrants any products purchased in the U.S.A. from an authorized Quantum Audio dealer. All products are warranted to be free from defects in material and workmanship under normal use and service for a period of one (1) year. This warranty applies to the original purchase only. Quantum Audio will either repair or replace (as its option) any unit that has been found to be defective and under warranty provided the defect occurs within the one (1) year warranty period.
