MOSFET POWER AMPLIFIERS Installation Instructions / Owner's Manual MDS GP2 MDS GP3 MDS GP4 MDS - Multi Dynamic Systems of Sweden AB Midsommarv. 8-10 126 35 Hägersten +46(08)556 00 740 www.mds.
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INTRODUCTION Congratulations on your purchase of a MDS state-of-the-art power amplifier. Your selection of a MDS product indicates a true appreciation of fine musical reproduction. Whether adding to an existing system or including your MDS 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.
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. It must be connected with the head unit in order to reset protection circuits.
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 FUSE L+ POWER SPEAKERS R+ +12V REM GND 20A BRIDGE IN-LINE POWER FUSE MOUNTED WITHIN 12" FROM BATTERY RECOMMENDED (NOT PROVIDED) RADIO'S REMOTE TURN-ON OUTPUT + - 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 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).
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.
INPUT HI-INPUT REMOTE FRONT REAR HI-INPUT OUTPUT GAIN +L- POWER PROTECT GAIN L +R- +L- X-OVER MAX MIN FILTER BASS BOOST +R- X-OVER BASS BOOST MAX MIN FILTER R 40Hz OdB 400Hz 12dB HPF FULL LPF HPF FULL LPF 40Hz 400Hz OdB 12dB 94.
SPEAKER CONNECTIONS Make the speaker connections using speaker wire that is at least 16 gauge or heavier. As with any audio component, proper phasing of the amplifier and speakers is essential for strong bass response. When connecting, make sure that positive (+) from the amplifier is connected to the positive (+) of the speaker, and the same for negative (-).
SPEAKER CONNECTIONS (BRIDGED) The MDS amplifiers are capable of being bridged in a mono configuration. This feature allows you the flexibility of using the amplifier to drive a ** subwoofer or a center channel. In this configuration the amplifier sums the right and left channel to deliver one channel (mono) output. Please note: in order for the amplifier to sum right and left signal information, both right and left RCA connections must be made.
SPEAKER CONNECTIONS (TRI-MODE) The amplifier is capable of running in a Mono / Stereo mode. This feature gives the amplifier the ability to run stereo satellites (midbass & tweeter) simultaneously with a mono subwoofer. These connections are more complicated because they require the use of passive crossover networks (Not provided) to divide the frequencies to the speakers. We have included a sample diagram for 4 Ohm connections.
REMOTE BASS CONTROL MODULE (OPTIONAL) 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 X-OVER AND BASS . (Please note: If you intend to use the amplifier in the Tri-mode configuration, it is necessary to set the crossover control to the “FULL” setting in order to receive full range output) The amplifiers are equipped with a built-in variable crossover network allowing you to select the crossover type (i.e. Low-Pass or Hi-Pass) and the desired crossover point.
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 Output Power @ 14.4 VDC : Max Output 4 ohm 2 ohm Bridged 4ohm Frequency Response S/N Ratio (A-weight) THD with 20k filter Channel Separation Low Input Level Hi Input Level Battery Voltage Range Crossover Type Crossover Frequency Crossover Slope Bass EQ at FULL/LP Fuse MDS GP2 MDS GP3 MDS GP4 100W x 2 max 50W x 2 75W x 2 150W x 1 10Hz-25KHz >75dB .30% 45dB 200mV-5V 1.5V-14V 10.
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Manual By MDS - Multi Dynamic Systems of Sweden AB Midsommarv. 8-10 126 35 Hägersten +46(08)556 00 740 www.mds.se www.extremeconcepts.com MDS AMP REV 1.31.
