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Zapco Support Central
Installation guides, Support

Zapco Legacy Products

Zapco products no more in production.

Recommendations and Quick Guides


Here you can find some quick guides and suggestions to solve possible problems during the installation or use of your ZAPCO product:

Note Z001: Amplifier: Class, Power, and Heat



User's Manual Download: Quick Start Guide  -  User's Manual (DCP v.2.0.10)

PC Software Download: DCP Software v.2.0.10 (Windows PC)

Mobile APP Download: A-APP v.IV1.03 (Android)  -  i-APP v.IV1.03 (iOS)


User's Manual Download: User's Manual


ST-X (1st/2nd Series)

The Studio-X line of Amplifiers from Zapco was designed specifically for today’s car audio market. The Studio-X compact chassis makes it an easy fit in any car and even in motorcycle fairings. The square, low profile chassis also means it will be easy to trim out for a great looking installation so your system will look as awesome as it sounds.

ST-X DSP User's Manual Download: Quick Start Guide  -  User's Manual

PC Software Download (Beta version): 4X DCP Software v.1.01 (Windows PC)  -  6X DCP Software v.1.01 (Windows PC)

ST-6X DSP Firmware: 6X Firmware Update (Jan,4 2020)

ST-X User's Manual Download: ST-X SQ Series Manual - ST-X Series Manual



Zapco Studio-D BT amps put big power in a small chassis. But these little beasts aren’t just small, and they aren’t just powerful. They sound  great! The ST-DBT amps come in two sizes, two Mico chassis 4-channel units and three larger but still compact chassis; all with Bluetooth Streaming.


Download: ST-D.BT Series Manual



(2015-2017) The first of the radically new Zapco digital products with a completely new look, new features, an easier to use PC GUI, and improved sound quality with improved S/N.

User's Manual Download: Quick Start Guide  -  User's Manual (DCP v.1.0.10)

PC Software Download: DCP Software v.1.0.10 (Windows PC)



Our 3rd generation of digital processing and the Zapco Digital Processing amplifiers. Great sound, clean Zapco power, and stealth fighter looks. The DPN is easier to load and use and the hassles of loading drivers are gone. Just drop the new system onto your desktop and go.

(2011 to 2015) DSP-Z8, Z8 III, Z6 III, DC Series

Download: DSP-Z8/DSP-Z8 III/DSP-Z6 III Manual  -  DPN Software v.  -  Software Updating Guide to v.

Download: DC Series Manual  -  DC Series Introduction

Early (2011) DSP-Z8 and 2nd Gen DC Amplifiers with RCA inputs

The first of the DSP-Z8s, with serial numbers 0001~0500 and the DC amps with RCA inputs use the DPN 200ms program that you can find here: DPN 200ms

2005 to 2010) DSP-Z6, DRC-SL, 1st Gen DC Amplifiers with SymbiLink inputs

The first ever full function digital processor for the car, with a full line of amplifiers with full function on-board processing.

Download: DPN Software v 1.41 (including 64bit Drivers, and Instructions)



Upgraded power supply, top end audiophile grade internal components, shortened signal path, custom built pots and more. Then we took out anything that wasn’t needed for sound quality (crossovers, tone controls, etc.) and redesigned the board and gave each LX amp its own numbered badge. They are built for the true audiophile.

Download: Z-LX Series Manual



The Zapco ZX Series Competition amps were designed to meet the needs of “Street Challenge” cars that use multiple midrange and high frequency drivers to achieve high SPL in a sound quality car. The high current power supply and output devices of the ZX full range amps crank out 2,000 watts of power with full range, class AB sound quality. All this power is available in either a 2 Channel or a 4 Channel amplifier.

Download: ZX Class-AB Series Manual  -  ZX Class-D Series Manual


Z (1st Series)

The Z-Series of Zapco amplifiers is the result of our experience over the last 40 years with the technology of sound reproduction, combined with what we have learned in consultations with the home and car audiophile communities over the last few years about human perception of sound.

Download: Z Series Class A/B Manual  -  Z Series Class D Manual


ST-D (1st Series)

Today’s technology has allowed us to develop a line of great sounding full range Class D amps at an affordable price range and in a size that’s an easy fit in today’s smaller cars. Small car doesn’t have to mean small sound, and you won’t have to give up the back seat for an amplifier.


Download: ST-D Series Manual



The C2K Competition Series were produced from 2000 to 2007. They ruled  both the SQ and the SPL lanes for years. There was even talk of making the C2K6.0 illegal for SPL because it was unfair competition.


Download: C2K Series Manual



Beginning with AG in '97 through the last Reference in 2007 the line was basically same. Small changes were made from year to year and some models in this manual weren't in the line in until 2002. Form, function, power, and model numbers were constant in all the AG/Reference amps.


Download: REF Series Manual

SL Processors

Signal Processors

Zapco SL series of SymbiLink Balanced Line analog processors ran from 1997 to 2007.


Download: SL Processors Manual



The SymbiLink balanced line adaptors and processors ran from 1997 to 2007. The items are no longer available but you will find the "Pinout" and other information here to make your own cables if you need them for your legacy products.


Download: SymbiLink Balanced Manual

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