---
product_id: 630068106
title: "Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms"
brand: "soundstream"
price: "$313.81"
currency: USD
in_stock: true
reviews_count: 5
category: "Soundstream"
url: https://www.desertcart.us/products/630068106-soundstream-rsm4-1200d-compact-class-d-subwoofer-amplifier-1-200
store_origin: US
region: United States of America
---

# 1200W max power punch Compact 3.75x1.75x7 inch footprint Built-in thermal & overload protection Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms

**Brand:** soundstream
**Price:** $313.81
**Availability:** ✅ In Stock

## Summary

> 🔊 Small Amp, Massive Impact — Power Your Ride Like a Pro!

## Quick Answers

- **What is this?** Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms by soundstream
- **How much does it cost?** $313.81 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/630068106-soundstream-rsm4-1200d-compact-class-d-subwoofer-amplifier-1-200)

## Best For

- soundstream enthusiasts

## Why This Product

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

## Key Features

- • **Versatile Connectivity:** Supports RCA and speaker-level inputs with 2-ohm stereo & 4-ohm bridged stability for any setup.
- • **Adaptive Signal Sensing:** Auto turn-on with Hi-Level input means zero wiring hassle and seamless factory radio integration.
- • **Precision Sound Control:** Variable high- and low-pass filters (35-250 Hz) let you tailor bass and mids for perfect clarity.
- • **Power-packed Class-D Tech:** Delivers 1200 watts of clean, efficient power in a micro chassis—big sound, small size.
- • **Robust Build with Smart Cooling:** Hybrid aluminum alloy heatsink ensures optimal heat dissipation for all-day distortion-free play.

## Overview

The Soundstream RSM4.1200D is a compact yet powerful 4-channel Class-D amplifier delivering up to 1200 watts max power. Designed for professional-grade sound in tight spaces, it features advanced automatic signal sensing for easy factory radio compatibility, customizable frequency filters, and robust thermal protection. Its ultra-small footprint and efficient cooling make it perfect for millennial professionals seeking high-performance audio without compromise.

## Description

Reserve Micro amp line is electrifying news for the new exclusive Soundstream Reserve dealer only series. Two available monoblocks and one important four-channel solution can help build these microamps to be a solution to almost any application. Don’t let these pint-sized monsters fool you. The most modern and greatest of Class-D full range technology allows us to pack 10 pounds of KICK-ASS in the 2-pound chassis. Once regarded as “dirty power,” Class-D’s stable performance, thanks to high power capability, maximum efficiencies, and low tolerance components, rivals traditional full-range competitors. Minimal power requirements, ultra-micro footprint, unbelievable sound worth, and easy install make Reserve Micro amplifiers great for any application. Soundstream RSM technology allows this compact amp to produce big power with less current draw from your vehicle charging or electrical system. High and low pass filters adapt the amp to the job at hand, whether it’s powering a nice set of component speakers or a couple of subwoofers. Are you using an original or factory radio? No problem, these amplifiers are equipped with an Automatic Hi-Level Signal Sensing Turn-On. There is no need to run a remote wire turn on; this amplifier will automatically detect the sound signal and turn on and off the amplifier. (Hi-Level Input only)

Review: Great little amp - Some of these other reviews are ridiculous. They’re expecting way too much for the size and cost of this amplifier. Done correctly. This amplifier will play nice and loud in most vehicles. it’s not going to win any awards for over-the-top sound quality but it doesn’t really really good job. The adjustments to block bass and set levels are easy to set and reasonably accurate. If you are looking for an amp to drive some middle to higher end speakers in a smaller vehicle, this amp is a great purchase. I am driving to 6 1/2 inch woofers and 1 inch tweeters on their own crossover network on channels, one and two. Channels three and four are bridged to run 2-8 inch JLAudio subwoofers. It hits hard and will play all day without distortion. Thanks Soundstream!
Review: Small but powerful - Great sound for a small amp, good for mids and highs or even 6x9s

## Features

- 🚗Product Higlights: Class-D Amplifier Technology 4-channel Premium Amplifier. Front and Rear Channels with variable high- and low-pass filters (35-250 Hz, 12 dB/octave)
- 🚗Basic Features: Equipped with RCA and Speaker-Level inputs. 30A Fuse rating integrated. Standard 2-ohm Stereo & 4-ohm Bridged Impedance Stability. Small footprint with dimensions of 3.75″W x 1.75″H x 7″L
- 🚗More Features: Equipped with Automatic Turn-On Hi-Level Signal Sensing for Direct Short, Thermal, & Overload Circuits Protection. Amplifier comes in Hybrid Aluminum Alloy Heatsink for Optimum Dissipation. 250mV – 8V High-Level Speaker Input or Low-Level RCA Input
- 🚗Latest Technology: The most modern and greatest of Class-D full range technology allows us to pack 10 pounds of KICK-ASS in the 2-pound chassis. Once regarded as “dirty power,” Class-D’s stable performance, thanks to high power capability, maximum efficiencies, and low tolerance components
- 🚗High Level Signal Sensing: Are you using an original or factory radio? No problem, these amplifiers are equipped with an Automatic Hi-Level Signal Sensing Turn-On. There is no need to run a remote wire turn on; this amplifier will automatically detect the sound signal and turn on and off the amplifier. (Hi-Level Input only)
- 🚗Inside the Box: A 4-Channel Amplifier, Owners Manual and (2) 8″ Line level input harnesses

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0B7CCP72T |
| Brand Name | Soundstream |
| Customer Reviews | 4.2 out of 5 stars 97 Reviews |
| Manufacturer | Soundstream |
| Manufacturer Part Number | RSM4-1200D |
| Model Number | RSM4-1200D |
| Unit Count | 1.0 count |

## Product Details

- **Item dimensions L x W x H:** 17.8 x 9.5 x 4.4 centimetres
- **Manufacturer:** Soundstream
- **Maximum supply voltage:** 8 Volts
- **Mounting type:** Surface Mount
- **Voltage:** 8 Volts

## Images

![Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms - Image 1](https://m.media-amazon.com/images/I/61jVg4EBZlL.jpg)
![Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms - Image 2](https://m.media-amazon.com/images/I/81auNNRUwLL.jpg)
![Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms - Image 3](https://m.media-amazon.com/images/I/812XZTmvOAL.jpg)
![Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms - Image 4](https://m.media-amazon.com/images/I/81ekDHQ7mtL.jpg)
![Soundstream RSM4.1200D, Compact Class-D Subwoofer Amplifier, 1,200 Watts Small Class D 4 Channel Amplifier, 220 Watts RMS 2 Channel 4 Ohms - Image 5](https://m.media-amazon.com/images/I/81tT16QjhvL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great little amp
*by R***N on 14 March 2024*

Some of these other reviews are ridiculous. They’re expecting way too much for the size and cost of this amplifier. Done correctly. This amplifier will play nice and loud in most vehicles. it’s not going to win any awards for over-the-top sound quality but it doesn’t really really good job. The adjustments to block bass and set levels are easy to set and reasonably accurate. If you are looking for an amp to drive some middle to higher end speakers in a smaller vehicle, this amp is a great purchase. I am driving to 6 1/2 inch woofers and 1 inch tweeters on their own crossover network on channels, one and two. Channels three and four are bridged to run 2-8 inch JLAudio subwoofers. It hits hard and will play all day without distortion. Thanks Soundstream!

### ⭐⭐⭐⭐ Small but powerful
*by A***W on 31 December 2025*

Great sound for a small amp, good for mids and highs or even 6x9s

### ⭐⭐⭐⭐⭐ Muito bom
*by E***O on 19 May 2026*

Ótima qualidade e potência

## Frequently Bought Together

- SOUNSTREAM RSM4.1200D Class D 4-Channel Car Amplifier – 1200W Car Audio Amp with Automatic Hi-Level Signal Sensing & RCA Inputs
- DteeDck RCA Splitter 1 Female to 2 Male, 2 Pack - RCA Audio Video Cable Splitter Adapter, Dark Blue
- RECOIL RCI412 100% Oxygen Free Copper 12ft 4-Channel RCA Audio Cable, Twisted Pair with Noise Reduction

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-07-16*