---
product_id: 141591416
title: "SMP300 Class D Digital Subwoofer Amplifier Rated at 500W Max"
brand: "osd audio"
price: "€ 1066.80"
currency: EUR
in_stock: true
reviews_count: 13
category: "Osd Audio"
url: https://www.desertcart.sk/products/141591416-smp300-class-d-digital-subwoofer-amplifier-rated-at-500w-max
store_origin: SK
region: Slovakia
---

# Compact 3"H x 9¼"D x 16¼"W design 500W max power output Adjustable phase & low pass filter SMP300 Class D Digital Subwoofer Amplifier Rated at 500W Max

**Brand:** osd audio
**Price:** € 1066.80
**Availability:** ✅ In Stock

## Summary

> 🎶 Feel the bass, not the bulk — power your sound with precision!

## Quick Answers

- **What is this?** SMP300 Class D Digital Subwoofer Amplifier Rated at 500W Max by osd audio
- **How much does it cost?** € 1066.80 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/141591416-smp300-class-d-digital-subwoofer-amplifier-rated-at-500w-max)

## Best For

- osd audio enthusiasts

## Why This Product

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

## Key Features

- • **Space-Savvy Design:** Sleek, compact footprint fits effortlessly into any home audio setup or entertainment center.
- • **Massive Bass Impact:** Unleash deep, room-shaking bass with a powerful 500W max Class D amplifier.
- • **Precision Sound Tuning:** Fine-tune your audio with adjustable phase and low pass filters for perfect bass alignment.
- • **Universal Compatibility:** Seamlessly integrates with all receivers via LFE, line-level, and speaker-level inputs.
- • **Cool & Efficient Performance:** Class D technology delivers high power without overheating or bulky size.

## Overview

The OSD Audio SMP300 is a high-efficiency Class D digital subwoofer amplifier delivering up to 500W max power. Designed for versatile compatibility, it supports LFE, line-level, and speaker-level inputs, making it perfect for both legacy and modern receivers. Its adjustable phase and low pass filters allow precise bass tuning, while its compact 3-inch height and efficient design ensure it stays cool and fits easily into any setup. Ideal for millennials seeking powerful, customizable bass without sacrificing space or style.

## Description

desertcart.com: OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 500W Max : Electronics

Review: Excellent Quality at a Low Price - Received this OSD SMP-100 subwoofer amp on January 9th 2020, after looking at different models this one made the most sense. After hooking it up and doing my tests this amp was exactly what I needed to include in my whole house audio system. This sub amp works excellent wired into my receiver and my 4 zone 8 speaker selector switch for my ceiling speakers with a separate not passive but an 8 inch active subwoofer, if it is wired and set up correctly this little amp @ 80RMS 100watts of power into 4 ohms can deliver enough power to shake my whole house at quarter of the volume from watching a movie or playing music it’s very clean sound with no hum feedback, it has a phase control to adjust for sub placement, a crossover control so you can adjust and set the low pass to your desire level and an overall volume control to set the desire volume, it will automatically switch off after 15 minutes if no audio signal is detected so no need for you to switch on and off manually. My recommendation is not to use speakers that are more than 8 inch 4 to 8 ohms as stated in the manual. Following a correct set up this little amp will deliver a clean solid deep bass without being out of phase with your system. This sub amp can also be used for powering an in-wall passive subwoofer like the OSD IWS 8 series which I will be doing later.
Review: So far… - So good! Had to set the auto-off to 30 minutes. Frustrating when it turned off every 5 minutes…

## Features

- BRING ON THE BASS: A highly efficiency Class D subwoofer amplifier that serves up big bass with up to 500W max power
- WORKS WITH ALL RECEIVERS: Compatible with older and newer source equipment and includes LFE, line-level and speaker-level inputs for greater flexibility
- ADJUSTABLE CONTROLS: Includes adjustable phase and low pass filter to dial in just the right amount of low frequency sound effects
- EFFICIENT CLASS D TECHNOLOGY: A highly efficient Class D sub amp that is ideal for budget-minded users who want a feature-rich digital sub amp that does not run hot or take up a lot of space
- COMPACT DESIGN: Measures only 3” inches high, 9 ¼” deep and 16 ¼” wide to fit just about anywhere

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07R4464D3 |
| Best Sellers Rank | #83,384 in Electronics ( See Top 100 in Electronics ) #550 in Audio Component Amplifiers |
| Brand | OSD Audio |
| Customer Reviews | 3.9 3.9 out of 5 stars (200) |
| Date First Available | April 25, 2019 |
| Item Weight | 8 pounds |
| Item model number | SMP-300 |
| Manufacturer | OSD Audio |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Output Power | 500 Watts |
| Package Dimensions | 26.4 x 13.4 x 6.3 inches |
| Package Type Name | box |
| Specification Met | CE |
| UPC | 810281010946 |

## Product Details

- **Brand:** OSD Audio
- **Manufacturer:** OSD Audio
- **Mounting Type:** Surface Mount
- **Number of Channels:** 1
- **Output Power:** 500 Watts

## Images

![SMP300 Class D Digital Subwoofer Amplifier Rated at 500W Max - Image 1](https://m.media-amazon.com/images/I/71lL+-FKfgL.jpg)

## Available Options

This product comes in different **Size, Style** options.

## Questions & Answers

**Q: how much power rms at 8 ohms?**
A: The manual mine came with "the 1000 Watt version" -- details it at providing 497 watts RMS at 8 ohms.

**Q: Anyone have an issue with the speaker out port not working?**
A: First off , do you have a audio signal out from the receiver/ amp to the input of subwoofer? Please check wiring diagram of the manual it should work.

**Q: Does the SMP100 require a 12v trigger cable to work properly?**
A: The SMP100 includes auto sensing that turns on the amp when an audio signal is detected then turns off automatically after 15 minutes when a signal is not detected, but it also has the manual on/off switch.

**Q: Will this work with a polk s35 center channel speaker?**
A: Yes. But this amp would be overkill. Simply get an a/v receiver instead.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Quality at a Low Price
*by R***L on January 14, 2020*

Received this OSD SMP-100 subwoofer amp on January 9th 2020, after looking at different models this one made the most sense. After hooking it up and doing my tests this amp was exactly what I needed to include in my whole house audio system. This sub amp works excellent wired into my receiver and my 4 zone 8 speaker selector switch for my ceiling speakers with a separate not passive but an 8 inch active subwoofer, if it is wired and set up correctly this little amp @ 80RMS 100watts of power into 4 ohms can deliver enough power to shake my whole house at quarter of the volume from watching a movie or playing music it’s very clean sound with no hum feedback, it has a phase control to adjust for sub placement, a crossover control so you can adjust and set the low pass to your desire level and an overall volume control to set the desire volume, it will automatically switch off after 15 minutes if no audio signal is detected so no need for you to switch on and off manually. My recommendation is not to use speakers that are more than 8 inch 4 to 8 ohms as stated in the manual. Following a correct set up this little amp will deliver a clean solid deep bass without being out of phase with your system. This sub amp can also be used for powering an in-wall passive subwoofer like the OSD IWS 8 series which I will be doing later.

### ⭐⭐⭐⭐⭐ So far…
*by M***L on May 1, 2024*

So good! Had to set the auto-off to 30 minutes. Frustrating when it turned off every 5 minutes…

### ⭐⭐⭐ Good Enough Amp for 70v Commercial.
*by I***N on July 21, 2022*

Bought this to install in a Friends Bar / Lounge. This was my First time dealing with 70V System, I have to say its pretty Dang Good for Hanging Subwoofers Amp. Only wish it had more power for the price.

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-05*