The ST-X Series. Class AB and D Amplifiers

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. And speaking of sound...This is a Zapco amplifier and sound is what it’s all about. These are Class A/B Zapco amplifiers. 

The Studio-X have the same high quality caps, op-amps, and bi-polar outputs that made the C2K and Reference series amps the industry standard for sound quality. 

Reliability? Zapco defines reliability. It’s not at all unusual to see Zapco amps moved from car to car and from generation to generation. Zapco Amps produced in the ‘90 are still being traded and bought on the internet by sound quality fans world wide. The Studio-x will be no different. 

For 2015 we have done something truly unique with the ST-4X II, we have taken this top seller and tweaked it to create two more ST-4X versions with targeted performance goals tailored for two groups of consumers whose musical tastes run in specific directions. First, we have created the ST-4X SQ for the customer who appreciates the finer points of the music and wants to invest a little extra for a more “live” sound. We did this by upgrading the caps and op-amps and making few other changes. The SQ version will have a more open sound and a more precise sound stage. We also used Tiffany style panel mount RCA connectors on the ST-4X SQ for a solid signal transfer. Then we made the same with the 2-channel model (ST-2X SQ) and 6-channel model (ST-6X SQ).

ST-X DSP: The Studio line was designed to bring great Zapco sound quality to a line of compact chassis amplifiers and they have sold extremely well. With top end internal components and innovative design, they have market leading performance. Now, for 2019, Zapco offers two of the Studio series amplifiers with on-board digital processing (DSP). With each of these ST-X DSP amps you get an on-board DSP with high-pass and low-pass filters, phase control, signal delay, and 15 channels of parametric equalization on each channel. To make tuning a breeze we developed and highly functional but easy to use control program (GUI) for PC.

The ST-4X DSP and the ST-6X DSP give you the great class AB sound with the compact chassis of the ST-X series and the amazing control and tuning ability of Digital Processing. With these DSP/Amplifiers you are not trading power for control, you get both. The ST-4X DSP will give you 4 x 65W/Ch @4Ω and the ST-6X DSP gives you 6 x 100W/Ch @4Ω.

ST-4X DSP

ST-4X DSP  4-Ch. Class-AB Amplifier with DSP

  • Power @ 4Ω: 4 x 65 watts

  • Power @ 2Ω: 4 x 95 watts

  • Power @ 4Ω Bridged: 2 x 190 watts

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 60dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm): 160(W) x 52(H) x 282(L)

399.99 $

ST-6X DSP

ST-6X DSP  6-Ch. Class-AB Amplifier with DSP

  • Power @ 4Ω: 6 x 100 watts

  • Power @ 2Ω: 6 x 150 watts

  • Power @ 4Ω Bridged: 3 x 300 watts

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 60dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm): 160(W) x 52(H) x 452(L)

599.99 $

ST-2X SQ

ST-2X SQ  2-Ch. Class-AB Sound Quality Amplifier

  • Power @ 4Ω: 2 x 65 watts

  • Power @ 2Ω: 2 x 95 watts

  • Power @ 4Ω Bridged: 1 x 190 watts

  • THD @ Rated Power  < 0.05%

  • Signal to Noise Ratio > 95dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm):    241(W) x 62(H) x 573(L)   

159.99 $

ST-4X DSP

ST-4X SQ  4-Ch. Class-AB Sound Quality Amplifier

  • Power @ 4Ω: 4 x 65 watts

  • Power @ 2Ω: 4 x 95 watts

  • Power @ 4Ω Bridged: 2 x 190 watts

  • THD @ Rated Power  < 0.05%

  • Signal to Noise Ratio > 95dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm): 160(W) x 52(H) x 282(L)

269.99 $

ST-6X SQ

ST-6X SQ  6-Ch. Class-AB Sound Quality Amplifier

  • Power @ 4Ω: 6 x 100 watts

  • Power @ 2Ω: 6 x 150 watts

  • Power @ 4Ω Bridged: 3 x 300 watts

  • THD @ Rated Power  < 0.05%

  • Signal to Noise Ratio > 95dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm): 160(W) x 52(H) x 452(L)

499.99 $

ST-4X II

ST-4X II  4-Ch. Class-AB Amplifier

  • Power @ 4Ω: 4 x 50 watts

  • Power @ 2Ω: 4 x 80 watts

  • Power @ 4Ω Bridged: 2 x 160 watts

  • THD @ Rated Power  < 0.5%

  • Signal to Noise Ratio > 60dB

  • Frequency Response 10Hz to 30,000Hz ±1dB

  • Dimensions (mm): 160(W) x 52(H) x 260(L)

199.99 $

ST-500XM II

ST-500XM II  Mono Class-D Bass Amplifier

  • Power @ 4Ω: 200 watts

  • Power @ 2Ω: 300 watts

  • Power @ 1Ω: 500 watt

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 85dB

  • Frequency Response 10Hz to 200Hz

  • Dimensions (mm):   160(W) x 52(H) x 179(L)  

249.99 $

ST-1000XM II

ST-1000XM II  Mono Class-D Bass Amplifier

  • Power @ 4Ω: 500 watts

  • Power @ 2Ω: 750 watts

  • Power @ 1Ω: 1000 watt

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 85dB

  • Frequency Response 10Hz to 200Hz

  • Dimensions (mm):   160(W) x 52(H) x 179(L)  

349.99 $

ST-1650XM II

ST-1650XM II  Mono Class-D Bass Amplifier

  • Power @ 4Ω: 750 watts

  • Power @ 2Ω: 1100 watts

  • Power @ 1Ω: 1650 watt

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 85dB

  • Frequency Response 10Hz to 200Hz

  • Dimensions (mm):   160(W) x 52(H) x 353(L)  

469.99 $

ST-2000XM II

ST-2000XM II  Mono Class-D Bass Amplifier

  • Power @ 4Ω: 1000 watts

  • Power @ 2Ω: 1500 watts

  • Power @ 1Ω: 2000 watt

  • THD @ Rated Power  < 0.2%

  • Signal to Noise Ratio > 85dB

  • Frequency Response 10Hz to 200Hz

  • Dimensions (mm):   160(W) x 52(H) x 420(L)  

569.99 $

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