---
product_id: 366155618
title: "SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm"
brand: "osd audio"
price: "354000 kr"
currency: ISK
in_stock: true
url: https://www.desertcart.is/products/366155618-smp500-mono-channel-class-d-subwoofer-amplifier-with-onboard-dsp
store_origin: IS
region: Iceland
---

# 400W RMS power output Auto-sensing power on/off Variable high-cut filter 30-150Hz SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm

**Brand:** osd audio
**Price:** 354000 kr
**Availability:** ✅ In Stock

## Summary

> 🎵 Unleash the bass beast—power, precision, and control in one sleek amp!

## Quick Answers

- **What is this?** SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm by osd audio
- **How much does it cost?** 354000 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/366155618-smp500-mono-channel-class-d-subwoofer-amplifier-with-onboard-dsp)

## 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

- • **Smart Efficiency:** Class D technology keeps the amp cool and efficient under heavy loads, so your system runs reliably and quietly.
- • **User-Friendly Design:** Rack-mountable with remote control, auto-sensing power, and protective volume limiter—engineered for convenience and longevity.
- • **Flexible Connectivity:** Supports both low-level and high-level pass-through inputs/outputs for seamless integration with legacy and modern audio setups.
- • **Powerhouse Performance:** Delivers a commanding 400W RMS and 1000W peak for deep, room-filling bass that transforms your home theater experience.
- • **Precision Bass Control:** Front panel variable high-cut filter lets you tailor bass frequencies, ensuring crystal-clear mids and highs from your main speakers.

## Overview

The OSD Audio SMP500DSP is a mono-channel Class D subwoofer amplifier delivering 400W RMS and 1000W peak power at 4 ohms. Featuring a variable high-cut filter, auto-sensing power on/off, and both low/high-level pass-through inputs, it enhances bass clarity and overall surround sound quality. Its efficient design runs cool under demanding loads, making it ideal for high-wattage passive subwoofers in home theaters and media rooms. Rack-mountable and remote-controlled, it combines professional-grade performance with user-friendly features.

## Description

SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm

## Features

- The SMP500 is designed for use with higher wattage passive subwoofers that require external power with up to 800 watts power peak / 400 watts RMS with 4 ohms. It has highly efficient Class D technology to run cool under demanding loads.
- SOUND QUALITY: Get a deep, crisp, clean low-frequency sound effect in dedicated home theater systems and media rooms to improve the overall sound quality of surround sound systems with dual 100/220 voltage.
- BASS: This amplifier improves bass response of passive subs with a variable high-cut filter and a front panel control knob that routes higher frequencies to main speakers for low frequency sound effects.
- CONTROL FEATURES: The SMP500 includes front-mounted power and back panel adjustable gain. A volume control limiter protects the woofers while low and high level pass-through inputs/outputs for greater flexibility.
- DESIGN: Rack mountable, the SMP500 supplies in-wall or stand-alone subwoofers with the power they need. CE & ETL rated with an auto sensing feature that automatically turns the amp on or off when a signal is detected. A remote control is included.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Item dimensions L x W x H | 38.1 x 12.7 x 15.2 Centimeters |
| Voltage | 220 Volts |
| Manufacturer | OSD Audio |
| Maximum Supply Voltage | 2.2E+2 Volts |
| Mounting Type | Surface Mount |
| Brand | OSD Audio |
| Number of Channels | 1 |
| Output Power | 400 Watts |
| Package Type Name | cardboard box |
| Specification Met | ce,etl |
| UPC | 819603013177 |
| Brand Name | OSD Audio |
| Speaker Type | Subwoofer, woofer |
| Colour Name | Black |
| Impedance | 4 Ohms |
| Peak Power Handling - Speakers | 1000 Watts |
| RMS Power Range - Amplifiers | 400 Watts |
| Product Dimensions | 38.1 x 12.7 x 15.24 cm; 3.63 kg |
| Item model number | SMP500DSP |
| Item Weight | 3 kg 630 g |

## Product Details

- **Item dimensions L x W x H:** 38.1 x 12.7 x 15.2 Centimeters
- **Voltage:** 220 Volts
- **Manufacturer:** OSD Audio
- **Maximum Supply Voltage:** 2.2E+2 Volts
- **Mounting Type:** Surface Mount

## Images

![SMP500 Mono-Channel Class D Subwoofer Amplifier with Onboard DSP 400W 4 -8 Ohm - Image 1](https://m.media-amazon.com/images/I/51VHJ8bGwbL.jpg)

## Available Options

This product comes in different **Size** 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.

## Frequently Bought Together

- OSD Audio 800W Mono-Channel Class D Subwoofer Amplifier – Onboard DSP, 4-8 Ohm – SMP500
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*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-27*