Owner's manual ST-series D Great Sound - Big Power - Compact Chassis Before operating the unit, please read this manual throughly and retain it for future reference.
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Mission Statement Committed to Excellence Zapco is dedicated to the pursuit of audio fidelity. Our prime objectives are to design and manufacture audio products of unsurpassed quality, to provide unparalleled support and service for these products, and to conduct business in a manner that will enhance the quality of life for all involved. Experience: Knowledge from Doing There is absolutely no substitute for experience; that is a simple fact of life.
Power and Wire Gauge The wire you use for the power and ground connections of your amplifier is absolutely critical. The plain simple fact is that it takes power to deliver power. If you do not provide the proper amount of 12V power to your amplifier, you will never reach the full power potential of the amp. Take a look at the chart below. If you want to have any respectable amount of power for your amp, you need a 4-gauge wire to the trunk as a bare minimum.
Gain Setting Matching Your Components for Best Sound Proper gain setting is one of the most important factors in setting up a stereo system. Unfortunately, gain setting is quite often done wrong. Turning up the gain of an amp is the very last thing you should ever do to a system. An amplifier is a step up transformer. Period. Any signal you put in is boosted by a fixed factor, whether it's music, hiss, or any other noise. A large number of noise problems are simply a matter of improper gain settings.
FEATURES ST-2D High efficiency Class D amplifier (efficiency : 80% @ 4 ohm, at 1kHz) 2/1 channel bridgeable car amplifier Ultra low power consumption Ultra compact heatsink Stable into 4 ohms bridged or 2 ohms stereo load PWM MOSFET power supply Input sensitivity (gain) control variable 18dB octave crossover slope Variable,selectable FULL / LP/ HP crossover 12 dB bass boost equalization control variable Signal input and output RCA connectors High level input connectors Multi-way protection circuitry (therma
FEATURES ST-5D High efficiency Class D amplifier (efficiency : 80% @ 4 ohm, at 1kHz) 5/3 channel bridgeable car amplifier Ultra low power consumption Ultra compact heatsink MOS-FET PWM power supply 4 ohm bridged or/and 2 ohm stereo load 18dB octave crossover slope Variable low pass filter Variable high pass filter Variable subsonic filter Signal input RCA connectors High level input connectors Multi-way protection circuitry (thermal / over current / speaker short / speaker DC protection) Tested voltage & TH
RCA CONNECTION ST-2D OUTPUT CH1 HI-INPUT GAIN FREQ BASS ST-2D INPUT CH1 + - - + CH1 CH2 MIN MAX 50Hz LPF CH2 FULL 250Hz 0dB 12dB HPF CH2 to INPUT of ADDITIONAL AMPLIFIERS HEAD UNIT ST-4D INPUT CH1 CH3 HI-INPUT GAIN FREQ BASS ST-4D CHANNEL 1/2 + - - + CH1 CH2 MIN MAX MIN MAX LPF FULL HPF 50Hz 250Hz 0dB 12dB 50Hz 250Hz 0dB 12dB CH3- CH4 + - + CH2 CH4 HI-INPUT GAIN FREQ CHANNEL 3/4 BASS HEAD UNIT Connect your source unit to the amplifier using the "INPUT" RCA
RCA CONNECTION ST-5D CHANNEL 5 CHANNEL 1/2 HI-INPUT GAIN HPF SUBSONIC LPF INPUT CH5A ST-5D INPUT CH1 CH3 + - - + CH1 CH2 MIN MAX FULL HPF 50Hz 1KHz 10Hz 60Hz CH3- CH4 + - + MIN CH2 30Hz 250Hz CH5A + - CH5B - + MAX 100Hz 2KHz CHANNEL 3/4 CH4 MIN MAX GAIN HI-INPUT CH5B HEAD UNIT ST-500DM / ST-1KDM HI-IN PUT CH1/L REMOTE GAIN + - - + CH1 CH2 Min Max CH2/R Wired Remote Control (optional) HEAD UNIT Connect your source unit to the amplifier using the "INPUT" RCA conne
HIGH LEVEL INPUT CONNECTION ST-2D OUTPUT CH1 HI-INPUT GAIN FREQ BASS ST-2D INPUT CH1 + - - + CH1 CH2 MIN MAX 50Hz LPF CH2 FULL 250Hz 0dB 12dB HPF CH2 CH2+ HEAD UNIT CH2 CH1 CH1+ from HEAD UNIT SPEAKER TERMINALS ST-4D INPUT CH1 CH3 HI-INPUT GAIN FREQ BASS ST-4D CHANNEL 1/2 + - - + CH1 CH2 MIN MAX MIN MAX LPF FULL HPF 50Hz 250Hz 0dB 12dB 50Hz 250Hz 0dB 12dB CH3- CH4 + - + CH2 CH4 HI-INPUT GAIN FREQ CHANNEL 3/4 BASS HEAD UNIT CH4+ CH2+ CH4 - CH2 - CH3 -
HIGH LEVEL INPUT CONNECTION ST-5D CHANNEL 5 CHANNEL 1/2 HI-INPUT GAIN HPF SUBSONIC LPF INPUT CH5A ST-5D INPUT CH1 CH3 + - - + CH1 CH2 MIN MAX FULL HPF 50Hz 1KHz 10Hz 60Hz CH3- CH4 + - + MIN CH2 30Hz 250Hz CH5A + - CH5B - + MAX 100Hz 2KHz CHANNEL 3/4 CH4 HEAD UNIT MIN MAX GAIN HI-INPUT CH5B CH5A+ CH5ACH5BCH5B+ CH4+ CH2+ CH4 - CH2 - CH3 - CH1 CH1+ CH3+ from HEAD UNIT SPEAKER TERMINALS ST-500DM / ST-1KDM HI-IN PUT CH1/L REMOTE GAIN + - - + CH1 CH2 Min Max C
POWER CONNECTION ST-2D / ST-4D / ST-5D / ST-500DM/ ST-1KDM GND REM B+ POWER INPUT GROUND Caution This amplifier is not supplied with internal fuse in itself. Make sure you install in-line fuse holder from the +terminal of battery. Recommend 70 Ampere fuse.(ST-2D) Recommend 100 Ampere fuse.(ST-4D) Recommend 150 Ampere fuse.(ST-5D) Recommend 100 Ampere fuse.(ST-500DM) Recommend 200 Ampere fuse.
SPEAKER CONNECTION ST-2D 1 Channel Bridged CH1/2 BRIDGED GND REM B+ PWR CH1 CH2 CH1-MONO SUBWOOFER PRT SPEAKER OUTPUTS POWER INPUT Speaker Impedance 4~8 ohms 2 Channel Stereo CH1/2 BRIDGED GND REM B+ PWR CH1 CH2 CH2 PRT POWER INPUT Speaker Impedance 2~8 ohms SPEAKER OUTPUTS CH1 3 Channel Tri Mode CH1/2 BRIDGED GND REM B+ PWR CH1 CH2 CH2 PRT POWER INPUT SPEAKER OUTPUTS Speaker Impedance 4~8 ohms X-O CH1 X-O X-O Note: All Tri-Mode woofer setups require crossovers between Woo
SPEAKER CONNECTION ST-4D 2 Channel Bridged CH1 GND REM B+ PWR CH1 CH3 CH2 CH4 Speaker Impedance 4~8 ohms CH1/2 BRIDGED PRT CH1 CH2 CH3 CH4 CH3/4 BRIDGED SPEAKER POWER INPUT CH2 4 Channel Stereo CH2 CH1 GND REM B+ PWR CH1 CH3 CH2 CH4 CH1/2 BRIDGED PRT CH1 CH2 CH3 CH4 Speaker Impedance 2~8 ohms CH3/4 BRIDGED SPEAKER POWER INPUT CH3 CH4 6 Channel Tri Mode Hook-up with required crossovers X-O CH5-MONO SUBWOOFER X-O CH2 X-O CH1 GND REM B+ PWR PRT CH1 CH3 CH2 CH4 Spe
SPEAKER CONNECTION ST-5D 5 Channel Mode GND REM B+ PWR CH5 CH5 CH3/4 BRIDGED CH1/2 BRIDGED CH4 CH4 CH2 CH2 CH3 CH3 CH1 CH1 CH1 CH2 PRT SPEAKER POWER INPUT Speaker Impedance 2~8 ohms CH3 CH4 CH5 SUB WOOFER Bridge Mode GND REM B+ PWR CH5 CH5 CH3/4 BRIDGED CH1/2 BRIDGED CH4 CH4 CH2 CH2 CH3 CH3 CH1/2Full Range CH1 CH1 PRT POWER INPUT Speaker Impedance 4~8 ohms SPEAKER CH3/4 Full Range CH5 SUB WOOFER -12-
SPEAKER CONNECTION ST-5D 5 Channel Mode Hook-up with required crossovers X-O GND REM B+ PWR CH5 CH5 CH3/4 BRIDGED CH1/2 BRIDGED CH4 CH4 CH2 CH2 CH3 CH3 CH1 CH1 CH1/2 BRIDGED PRT POWER INPUT SPEAKER X-O X-O CH1 CH2 Speaker Impedance 4~8 ohms X-O X-O CH3 CH4 CH3/4 BRIDGED X-O Note: All Tri-Mode woofer setups require crossovers between Woofers and Mids-Highs to preserve minimum impedance for amplifier stability.
SPEAKER CONNECTION ST-500DM / ST-1KDM 1. Single Voice 4 Ohm Load GND REM B+ SPK A PWR 2 Ohm Load GND SPK B REM B+ SPK B PRT SPEAKER OUTPUTS POWER INPUT SPEAKER OUTPUTS POWER INPUT - + (4 SPK A PWR PRT SUBWOOFER Single Voice Coil) GND - + REM (4 1 Ohm Load B+ PWR SPK A - + SUBWOOFER x 2 Single Voice Coil) SPK B PRT POWER INPUT - + - + SPEAKER OUTPUTS (4 - + - + SUBWOOFER x 4 Single Voice Coil) 2.
SPECIFICATIONS ST-2D Rated power output -RMS power, 4 ohms stereo ------- 100W x 2CH -RMS power, 2 ohms stereo ------- 200W x 2CH -RMS power, 4 ohms bridged ------ 400W x 1CH Signal to Noise Ratio ------------------ >90dB Low Pass Crossover ------------------- 30Hz ~ 250Hz High Pass Crossover ------------------- 50Hz ~ 500Hz Bass boost @ 45Hz -------------------- Variable 0~12dB Frequency Response ------------------- 10Hz ~ 30KHz (+/-1dB) T.H.D @ 4 ohms ---------------------- < 0.
TROUBLE SHOOTING GUIDE This power amplifier has protection features to prevent most forms of damage. If the unit senses excessive heat, short circuited speakers or overload, the protection indicators will be lit and the system will be turned off. Prior to checking the wiring for any fault, you should turn all level controls down and turn off power. If the amplifier shuts down due to excessive heat, the protection indicators will not be lit: simply allow the amplifier to cool down.
Technical Assistance Should you experience a problem with your DSP6-SL or DRC-SL, please contact the dealer that sold you this product. If your dealer is unable to solve your problem, you may contact the factory service department directly. Phone: (209) 577-4268 Monday - Friday, 8AM - 5PM Pacific Standard Time FAX: (209) 577-8548 Also, check our web page, www.zapco.com, for tips. You can also e-mail for technical help directly from our web page.
ARPA of America Corporation 3037 E Palm Ave Suite 102 Manteca, CA 95337 Phone: (800) 47-Force The Zapco DC-Series is a joint venture of ARPA of America and ARPA Italy and manufactured in Korea
