---
product_id: 714194426
title: "350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers"
brand: "waudio"
price: "R8271"
currency: ZAR
in_stock: true
reviews_count: 11
category: "W Audio"
url: https://www.desertcart.co.za/products/714194426-350w-class-d-subwoofer-plate-amplifier-high-performance-amp-board
store_origin: ZA
region: South Africa
---

# 350W RMS Power 0°/180° Phase Switch Adjustable 25-180Hz Low-Pass Filter 350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers

**Brand:** waudio
**Price:** R8271
**Availability:** ✅ In Stock

## Summary

> 🎵 Elevate your bass game — because your sound deserves to be legendary.

## Quick Answers

- **What is this?** 350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers by waudio
- **How much does it cost?** R8271 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/714194426-350w-class-d-subwoofer-plate-amplifier-high-performance-amp-board)

## Best For

- waudio enthusiasts

## Why This Product

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

## Key Features

- • **Compact Yet Robust:** Fits discreetly into subwoofer enclosures with built-in protection for long-lasting reliability.
- • **Precision Bass Control:** Customize your sound with a variable low-pass filter and phase switch for perfect room integration.
- • **Versatile Connectivity:** Supports both balanced XLR and unbalanced RCA inputs for seamless integration with any setup.
- • **Smart Auto Power On/Off:** Save energy effortlessly as the amp powers up only when audio signals are detected.
- • **Powerful 350W RMS Output:** Unleash deep, distortion-free bass with high-efficiency Class-D amplification.

## Overview

The WAudio 350W Class-D Subwoofer Plate Amplifier delivers powerful, clean bass with 350W RMS at 4Ω and less than 1% distortion. Featuring adjustable low-pass filtering (25-180Hz), a phase switch for perfect acoustic alignment, and smart auto power on/off, it offers professional-grade control in a compact design. With balanced XLR and RCA inputs plus robust protection circuitry, it’s engineered for audiophiles, home theaters, and pro setups seeking immersive, punchy low-end performance.

## Description

Product Description: Enhance your audio experience with the WAudio 350W Class-D Subwoofer Plate Amplifier, designed to deliver ultimate low-frequency performance for your subwoofer. Built to powerfully drive deep, distortion-free bass, this amp is ideal for home theater enthusiasts, audiophiles, and professional sound setups. Its compact design, advanced control features, and robust build make it an essential component in achieving the perfect bass response for any sound system. Whether you’re setting up a booming home theater or a high-fidelity audio system, the WAudio 350W plate amplifier ensures seamless integration and easy installation. Featuring RCA and XLR inputs for versatile connectivity, auto power on/off, and adjustable crossover frequencies, you’ll have complete control over your subwoofer’s performance. Specification: Output Power: 350W RMS @ 4Ω, THD 90dB Frequency Response: 25Hz-180Hz Low-Pass Crossover Range: 25Hz-180Hz (12dB/OCT) Line/XLR Input Sensitivity: 180mV Variable Phase Control: 0°-180° Built-in Bass Boost: +6dB @ 45Hz Protection Features: Short circuit, overload, and over-temperature protection Operating Voltage: 110-240V AC (selectable) Dimensions: 205mm x 235mm x 65mm Standby Power Consumption: <0.5W Applications: Home Theaters: Experience cinema-grade bass that rumbles and resonates with clarity and power, perfect for watching movies or gaming. Music Studios: Perfect for professional or home studios, allowing you to fine-tune your bass for accurate monitoring and playback. Live Performance Setups: Suitable for live sound reinforcement, providing reliable and powerful bass for concerts and events. Audiophile Systems: Elevate your listening experience by pairing this amp with high-end speakers, delivering deep, immersive low-end frequencies. Why Choose the WAudio Subwoofer Plate Amplifier? The WAudio 350W Class-D Plate Amplifier is the ultimate solution for anyone looking to maximize their subwoofer’s performance. With its advanced features, durable construction, and user-friendly controls, this amp provides unmatched sound quality and reliability. Whether you’re an audiophile, a professional audio engineer, or simply want to upgrade your home theater, this plate amplifier offers everything you need to unleash the full potential of your subwoofer.

Review: Top notch build quality and great specification - I was very excited to receive this, to add it to my ever increasing selection of projects, that I have great passion for, but very little time! Upon arrival, I was pleased by the heft of it. This is a chunky item, and so it should be if its power claims are to be believed. As a self-certified professional amateur electrical engineer, I am over confident in claiming that this looks particularly well put together. The PCB is clean, solder joints look excellent, and cables have been managed thoughtfully and zip-tied in place. I can't add my real-world testing experience as of yet, I will certainly update this review when I can, but if the specs are to be believed, and the manufacturer has included images showing measured values, then this will be a great performer. Perfect for a small/mid sized home cinema with a 12"-15" sub in a properly ported and proportioned cabinet. Personally I plan to use it as part of my Hi-Fi, so I am thinking about driving a couple of smaller punchy subs, 10", in a sealed enclosure. Selection of inputs is nice, you have standard RCA but also balanced XLR. All the controls are reassuringly tactile and solid, nice positive clicky toggle switches and smooth pots. The sub can be set to "wake" upon input. Functionality seems great! In terms of value for money, there is a lot of competition, but this is a level of quality above the typical generic amp. I trust the spec here, and so for a quality 350w plate amp, the current asking price is very reasonable.
Review: Good quality subwoofer plate - - Easy to install and fits well into DIY subwoofer projects - Clean, punchy bass with no noticeable distortion even at higher volumes - Good range of inputs and speaker-level options for flexibility - Built-in crossover and gain controls for easy adjustment - Slight hum in quiet rooms and slight delay in signal kick-in, but overall pleased with performance and price point

## Features

- 【High Efficiency Class-D Amplification】- This amplifier provides 350W RMS power at 4Ω with minimal heat dissipation, ensuring efficient and powerful performance even at high volumes, with less than 1% total harmonic distortion (THD).
- 【Auto Power On/Off】- Energy-saving feature automatically turns the amplifier on when it detects an audio signal and off when not in use, reducing power consumption.
- 【Phase Switch (0°/180°)】- Optimize your subwoofer's performance by adjusting phase settings to match your room’s acoustics and speaker placement, ensuring that the bass integrates perfectly with the rest of your sound system.
- 【Variable Low-Pass Filter】- Customize the crossover frequency between 25Hz and 180Hz, allowing you to precisely control how the subwoofer interacts with your main speakers, ensuring smooth, well-blended bass output.
- 【Balanced & Unbalanced Inputs】- Features high-quality RCA (unbalanced) and XLR (balanced) inputs for flexible connectivity with a wide range of audio equipment, ensuring noise-free audio transmission.
- 【Robust Protection Circuitry】- Built-in protection against short circuits, over-temperature, and overload ensures long-term reliability and safety for your amplifier and connected subwoofer.
- 【Compact Design】- Measuring just 205mm x 235mm x 65mm, this compact yet powerful plate amplifier fits discreetly into subwoofer enclosures without sacrificing power or functionality.
- 【Bass Boost Feature】- For extra punch, the amp includes a built-in bass boost at 45Hz (+6dB), giving you more depth in your low-end frequencies, perfect for cinema-quality sound or intense music playback.
- 【Universal Voltage Compatibility】- Designed for global use, the amp supports both 110V and 240V input voltage, making it ideal for international setups.
- 【Standby Mode】- Energy-efficient standby mode consumes less than 0.5W of power, making it environmentally friendly without sacrificing convenience.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DKB3JLPK |
| Batteries Required? | No |
| Batteries included? | No |
| Best Sellers Rank | 61,792 in Electronics & Photo ( See Top 100 in Electronics & Photo ) 365 in Hi-Fi Amplifiers |
| Customer Reviews | 4.4 4.4 out of 5 stars (89) |
| Date First Available | 28 Nov. 2024 |
| Item Package Quantity | 1 |
| Item Weight | 1.1 kg |
| Item model number | SUA-350 |
| Manufacturer | CVI |
| Part number | SUA-350 |
| Plug profile | Surface Mount |
| Product Dimensions | 23.5 x 20.5 x 6.5 cm; 1.1 kg |
| Specification met | CE |
| Voltage | 230 Volts |
| Wattage | 350 |

## Product Details

- **Item dimensions L x W x H:** 23.5 x 20.5 x 6.5 centimetres
- **Manufacturer:** CVI
- **Maximum supply voltage:** 240 Volts
- **Minimum supply voltage:** 110 Volts
- **Voltage:** 230 Volts

## Images

![350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers - Image 1](https://m.media-amazon.com/images/I/718ik-0gCOL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Top notch build quality and great specification
*by T***G on 27 September 2025*

I was very excited to receive this, to add it to my ever increasing selection of projects, that I have great passion for, but very little time! Upon arrival, I was pleased by the heft of it. This is a chunky item, and so it should be if its power claims are to be believed. As a self-certified professional amateur electrical engineer, I am over confident in claiming that this looks particularly well put together. The PCB is clean, solder joints look excellent, and cables have been managed thoughtfully and zip-tied in place. I can't add my real-world testing experience as of yet, I will certainly update this review when I can, but if the specs are to be believed, and the manufacturer has included images showing measured values, then this will be a great performer. Perfect for a small/mid sized home cinema with a 12"-15" sub in a properly ported and proportioned cabinet. Personally I plan to use it as part of my Hi-Fi, so I am thinking about driving a couple of smaller punchy subs, 10", in a sealed enclosure. Selection of inputs is nice, you have standard RCA but also balanced XLR. All the controls are reassuringly tactile and solid, nice positive clicky toggle switches and smooth pots. The sub can be set to "wake" upon input. Functionality seems great! In terms of value for money, there is a lot of competition, but this is a level of quality above the typical generic amp. I trust the spec here, and so for a quality 350w plate amp, the current asking price is very reasonable.

### ⭐⭐⭐⭐⭐ Good quality subwoofer plate
*by C***W on 18 September 2025*

- Easy to install and fits well into DIY subwoofer projects - Clean, punchy bass with no noticeable distortion even at higher volumes - Good range of inputs and speaker-level options for flexibility - Built-in crossover and gain controls for easy adjustment - Slight hum in quiet rooms and slight delay in signal kick-in, but overall pleased with performance and price point

### ⭐⭐⭐⭐ Great replacement subwoofer amplifier!
*by A***S on 8 February 2026*

I have been using this for a week or so and so far it is performing excellently! I used it to replace the failed amp in my KEF subwoofer which is connected to a Yamaha AV amp. It seems almost better than the original! I did have to make up an adapter plate as this amp is smaller than the original. The only slight negative for me is the brightness of the red standby led, which makes a red circle of light on the wall it sits next to!

## Frequently Bought Together

- WAudio 350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers
- FosPower Banana Plugs 6 Pairs / 12 pcs, Closed Screw 24K Gold Plated Banana Speaker Plug Connectors for Speaker Wire, Wall Plate, Home Theater, Audio/Video Receiver, Amplifiers and Sound Systems
- EMK RCA Subwoofer Cable 90 Degree RCA to RCA Audio Cable 24K Gold-Plated Nylon Braided Double Shielded Digital Analogue Supports Amplifiers,Home Theater,Hi-Fi Systems,Subwoofer(15ft/5m)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-26*