Zapco ST-2X SQ Class A/B 2-Channel Sound Quality Amplifier

Model: ST-2XSQ UPC: 636644606478 Item: 170584


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Zapco ST-2XSQ Overview

As the “SQ” in the model number of the Zapco ST-2XSQ 2-channel car audio amplifier designates, this amplifier was built to offer you rich sound quality. Its full-range, Class A/B scheme ensures powerful output and superb sound reproduction from your speakers.

Product Information

Product highlights

  • 2-channel amplifier
  • 65 watts x 2 at 4 ohms
  • 95 watts x 2 at 2 ohms
  • 190 watts x 1 bridged at 4 ohms
  • Class A/B for superb sound quality
  • Variable high-pass and low-pass filters
  • Aftermarket radio integration via pre-amp inputs
  • High-level inputs for factory-installed audio system integration
  • Auto turn-on through high-level input
  • 2-channel pre-amp outputs for an additional amplifier
  • 4-gauge power/ground inputs (power kit sold separately)
  • Product dimensions (WxHxD): 7-1/16”W x 2-1/16”H x 6-3/8”D
  • Warranty: 1 year - World Wide Stereo is an authorized dealer for every brand we sell
  • Included: World Wide Stereo 60-day guarantee and expert product support

Class A/B Throughout

Zapco opted to use Class A/B architecture throughout their 2-channel ST-2XSQ car audio amplifier. They did this because of the strong output and excellent sound quality that Class A/B offers in comparison to the other classes that exist. Teamed up with Zapco’s experienced sound engineers, you’re looking a finely-crafted amplifier.

Full-range Outputs on All Channels

Are you setting up a killer audio system and you’re in the market for an amplifier that delivers strong, reliable full-range power through 2 channels? Zapco’s ST-2XSQ amplifier is the perfect solution for you. If you end up changing the configuration of your audio system, you can simply flick some switches to engage the on-board high-pass and low-pass filters.

Compact Chassis

Adding an amplifier to new speakers makes them sound as good as they possibly can, but is it worth it if the amplifier takes up most of your trunk? Maybe, but probably not. Measuring in at only 7-1/16”W x 2-1/16”H x 6-3/8”D, the ST-2XSQ is small enough to mount under a seat or on the rear of one of your back seats. Don’t be fooled by its size, though, as it can power just about any set of speakers that you hook up to it.

Looking for a different amplifier configuration? The Zapco ST-X SQ-series is also available in a 4-channel or 6-channel design.



  • Power @ 4 ohms: 2 x 65 watts
  • THD @ Rated Power: <0.5%
  • Power @ 2 ohms: 2 x 95 watts
  • Power Bridged @ 4 ohms: 190W RMS
  • Signal-to-Noise Ratio: >90dB
  • THD + Noise: <0.5%
  • Channel Separation: >60dB
  • Frequency Response: 15Hz to 30kHz +/- 1dB
  • Input Sensitivity: .25V to 5V
  • Dimensions (mm): 160W x 52H x 180L

What's in the Box

What's in the Box:

  • One ST-2X SQ amplifier
  • Speaker level input plug
  • Owner's manual



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Why did you choose this?
World Wide Stereo Store
power component speakers
Steven T on Jul 2, 2019
power component speakers
Steven T on Jul 2, 2019