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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.

Another simple fact is that ZAPCO has, for over forty years, been the leader in

defining quality standards for the car audio industry.

These years of experience have led to a thorough understanding of the 

challenges that are unique to the world of car audio. ZAPCO's relentless quest

for sonic purity consistently yields imaginative designs that utilize the most 

innovative technologies. The resulting products set the criteria by which all

others in the industry are judged.

Summary of Contents for ST-2B

Page 1: ...1 ST B SERIES Owner s Manual Before operating the unit please read this manual throughly and retain it for future reference...

Page 2: ...rom doing There is absolutely no substitute for experience that is a simple fact of life Another simple fact is that ZAPCO has for over forty years been the leader in defining quality standards for th...

Page 3: ...s reputation With all the new amps coming into the market not one has been any threat to Zapco s standing as the premium amp and processor line Just check the audio competition scene and the audio for...

Page 4: ...ed by routing all wires away from moving hinges and seats This also includes brake gas and clutch pedals hood and trunk hinges etc Continuous exposure to excessive sound pressure levels may cause perm...

Page 5: ...must be connected the vehicle battery s positive terminal and a main system fuse should be placed close to the battery The main ground or negative connection must be securely attached to bare metal at...

Page 6: ...and by the weakest physical connection in the circuit Wire Size It s often surprising how many people will obsess about signal wire but routinely provide the amplifier with only a fraction of the curr...

Page 7: ...few guidelines The amplifier can be mounted in any direction on wood metal or carpet The metal chassis of the amp can be grounded or left isolated The amplifier requires adequate ventilation Creating...

Page 8: ...evel input plug for OEM hookup 2 RCA inputs from an after market head unit 3 Pass through RCA output allows daisy chaining amplifiers 4 Variable gain control set to minimum before initial turn on 5 Ba...

Page 9: ...ol 4 Front Channels Variable gain control set to minimum before initial turn on 5 Front channels RCA inputs 6 Pass through RCA output rear channels can feed another amp 7 Rear channels RCA inputs 8 Re...

Page 10: ...Plus the ST 1B has a remote control port 1 RCA inputs 2 RCA outputs 3 Variable gain control set to minimum before initial turn on 4 Crossover function selector for full range of low pass 5 Low Pass fr...

Page 11: ...of any ST B amplifier you use the left channel Ch1 positive and the right channel Ch2 negative as indicated on the chassis by the speaker terminals ST 2B Speaker Wiring 2Ch Stereo Mode A simple 2 spea...

Page 12: ...ou can have two 2 loads but you must use a passive crossover on each speaker in the three channel mode With the crossovers in the line the amplifier will always see a minimum load of 2 on each channel...

Page 13: ...amp to a mono woofer you can use the 4 Ch amp in a dual mono mode to create in this case a stereo amp with 190 watts RMS ch As with any bridged setup the speakers must be a minimum of 4 impedance If...

Page 14: ...channels Below is an active system with a bridged subwoofer on the rear channels 5Ch System The 5 speakers system requires a passive crossover between the front highs and the mono woofer with capacit...

Page 15: ...e 20Hz 20KHz 1dB Input Sensitivity 25v to 5v Dim in mm 182 W x 52 H x 200 L Overall 182 W x 52 H x 230 L ST 4B Power 4 4 x 65 watts Power 2 4 x 90 watts Power 4 Bridged 2 x 180 watts THD Rated Power 0...

Page 16: ...1 Modesto California USA Since 1974 zapco com...

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