---
product_id: 681640017
title: "350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers"
brand: "waudio"
price: "$620"
currency: NZD
in_stock: true
reviews_count: 13
category: "W Audio"
url: https://www.desertcart.nz/products/681640017-350w-class-d-subwoofer-plate-amplifier-high-performance-amp-board
store_origin: NZ
region: New Zealand
---

# 350W RMS Power Auto Power On/Off Variable Low-Pass Filter 25-180Hz 350W Class-D Subwoofer Plate Amplifier - High Performance Amp Board Module for Subwoofers

**Brand:** waudio
**Price:** $620
**Availability:** ✅ In Stock

## Summary

> 🎵 Feel the bass, not the bulk — power meets precision in one sleek amp!

## 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?** $620 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/681640017-350w-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

- • **Smart Energy Saving:** Auto power on/off and ultra-low standby consumption keep your setup eco-friendly and efficient.
- • **Precision Bass Control:** Customize your sound with a variable low-pass filter and phase switch for perfect room integration.
- • **Versatile Connectivity:** Balanced XLR and unbalanced RCA inputs ensure noise-free, professional-grade audio compatibility.
- • **Compact & Durable Design:** Fits discreetly into any subwoofer enclosure with robust protection circuitry for long-term reliability.
- • **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 professional-grade, distortion-free bass with 350W RMS power at 4Ω. Featuring advanced controls like a variable low-pass filter (25-180Hz), phase switch, and built-in bass boost, it offers precise sound customization. Its auto power on/off and standby mode optimize energy use, while balanced XLR and RCA inputs provide versatile connectivity. Compact and robust, this amp is ideal for home theaters, studios, and audiophile setups seeking powerful, clean low-frequency 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: Impressive - I wanted to put a car sub into a home theater setting for music listening in the garage. Figured I would hook it up to a plate amp. This amp was best bang for buck for its claimed power output. I didn't expect TOO much out of this set up so I built a sub box out of 1/2" osb scrap from work, especially since the sub is dvc wired in series from 2ohm to 4ohm. It's actually performing so well that I now plan to build a proper box out of 3/4" mdf to actually get the full performance out of the amp and sub. This sub is rated at 800w rms btw. I'm impressed with this amp. I've only had it for a month so if it fails I'll come back and update
Review: Excellent performance - I installed this in a Klipsch R-121SW and although I had to modify the opening slightly I am very pleased with the result. It sounds better than the oem amp. Hopefully it will last longer than the 3 oem amps I had to replace over the last 5 years. I highly recommend this product.

## 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 |
| Best Sellers Rank | #62,402 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #12 in Audio Amplifiers |
| Brand | WAudio |
| Date First Available | October 19, 2024 |
| Item Weight | 2.42 pounds |
| Item dimensions L x W x H | 9.25 x 8.07 x 2.56 inches |
| Item model number | SUA-350 |
| Manufacturer | CVI |
| Material | Metal |
| Maximum Supply Voltage | 240 Volts (AC) |
| Minimum Supply Voltage | 240 Volts (AC) |
| Mounting Type | Surface Mount |
| Number of Channels | 2 |
| Output Power | 350 Watts |
| Package Type Name | Box |
| Product Dimensions | 9.25 x 8.07 x 2.56 inches |
| Specification Met | CE |
| UPC | 889743444971 |
| Voltage | 230 Volts |

## Product Details

- **Item dimensions L x W x H:** 9.25 x 8.07 x 2.56 inches
- **Manufacturer:** CVI
- **Maximum Supply Voltage:** 240 Volts (AC)
- **Minimum Supply Voltage:** 240 Volts (AC)
- **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)

## Available Options

This product comes in different **Model** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Impressive
*by T***. on October 10, 2025*

I wanted to put a car sub into a home theater setting for music listening in the garage. Figured I would hook it up to a plate amp. This amp was best bang for buck for its claimed power output. I didn't expect TOO much out of this set up so I built a sub box out of 1/2" osb scrap from work, especially since the sub is dvc wired in series from 2ohm to 4ohm. It's actually performing so well that I now plan to build a proper box out of 3/4" mdf to actually get the full performance out of the amp and sub. This sub is rated at 800w rms btw. I'm impressed with this amp. I've only had it for a month so if it fails I'll come back and update

### ⭐⭐⭐⭐⭐ Excellent performance
*by D***. on January 4, 2026*

I installed this in a Klipsch R-121SW and although I had to modify the opening slightly I am very pleased with the result. It sounds better than the oem amp. Hopefully it will last longer than the 3 oem amps I had to replace over the last 5 years. I highly recommend this product.

### ⭐⭐⭐⭐⭐ Fantastic amp.
*by A***2 on October 2, 2025*

This is a great plate amp,rather for a diy of to replace a faulty one . I bought this to replace the amp in my M&k 12" not because it was bad but for the amazing amount of frequency control you can achieve with it over your standard frequency and gain knobs. I have two other subs in my av room and all my speakers are Klipsch including two spl 10" subs and this allows me to fine tune the frequencies to match those .

## 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 New Zealand*
*Store origin: NZ*
*Last updated: 2026-03-01*