---
product_id: 73417384
title: "Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier"
brand: "zapco"
price: "¥8663"
currency: JPY
in_stock: false
reviews_count: 2
url: https://www.desertcart.jp/products/73417384-zapco-st-4x-sq-300-watts-4-channel-sound-quality
store_origin: JP
region: Japan
---

# Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier

**Brand:** zapco
**Price:** ¥8663
**Availability:** ❌ Out of Stock

## Quick Answers

- **What is this?** Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier by zapco
- **How much does it cost?** ¥8663 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/73417384-zapco-st-4x-sq-300-watts-4-channel-sound-quality)

## Best For

- zapco enthusiasts

## Why This Product

- Trusted zapco brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Description

ST-4X SQ Class A/B 4-Channel Sound Quality AmplifierThe ST-X Series. Class A/B 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 ‘90s are still being traded and bought on the internet by sound quality fans world wide. The Studio-X will be no different.These amps are built to last. See the Studio-X amps at a dealer today.Studio-X Class A/B Full-Range AmplifiersThere are six full-range amplifiers in the Studio-X series and all are Class A/B and all use bi-polar output devices for the smoothest possible sound. And all are packed with all those features you want. Common features of the ST-X amplifiers include variable HP/LP/Full Range electronic crossovers variable bass boost variable gain by channel pair speaker level input heavy duty positive lock terminal blocks and preamp outputs to daisy chain out to the next amp in your system without having to add more RCA cables. And the most important feature shared by all the ST-X amps is the legendary Zapco sound quality developed with over 40 years of experience.Zapco has 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. They did this by upgrading the ca

## Images

![Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier - Image 1](https://images-na.ssl-images-amazon.com/images/I/61YvMEuC-aL.jpg)
![Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier - Image 2](https://images-na.ssl-images-amazon.com/images/I/61RNY7pF0IL.jpg)
![Zapco ST-4X SQ 300 Watts 4-Channel Sound Quality Class A/B ST-X Series Amplifier - Image 3](https://images-na.ssl-images-amazon.com/images/I/612-C5021oL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Great amp
  

*by A***R on Reviewed in the United States on September 8, 2018*

One of the best sounding amps I have ever owned. No noise, just crystal clear sound.

### ⭐⭐⭐⭐ 







  
  
    Good amp, not worth the price or the hype after a weeks of owning.
  

*by P***L on Reviewed in the United States on March 8, 2019*

I bought this amp wanting the best possible sound quality and thinking that the low wattage rating would be justified by Zapco's sound quality.  Now, that is partially true but an amp putting out a clean 100 watts RMS will sound louder and clearer than this amplifier which is ultimatley why I sold it.  I ended up getting a ct sounds at 60.4 amp, which at 14.4 volts ..my vehicle when driving and listening to regular level music sits at about 14.1-14.2, and its sending about 90-100 watts RMS to each speaker instead of the 65 of this amp.  You can tell the difference and I am happier with the ct sounds amp and don't care what people say about going from a Zapco to a CT sounds.  The Zapco has a special kind of sound it gives off which is distinctly Zapco to me but the low wattage of this amplfier doesn't justify its price for me.  It should be 150 bucks all day.  The price point is absurd for it, and just because it has Zapco written on it and high quality components, for me personally, doesn't make it worth 280 bucks.  I got mine used for 180 and kept it for about 3 weeks before finally giving in and agreeing with myself that I just needed more watts.

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-04*