---
product_id: 385101495
title: "OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max"
brand: "osd audio"
price: "KD 403.95"
currency: KWD
in_stock: true
reviews_count: 5
category: "Osd Audio"
url: https://www.desertcart.com.kw/products/385101495-osd-audio-smp300-class-d-digital-subwoofer-amplifier-rated-at
store_origin: KW
region: Kuwait
---

# Class D high efficiency Compact <9x10 inches 200W max power OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max

**Brand:** osd audio
**Price:** KD 403.95
**Availability:** ✅ In Stock

## Summary

> 🎵 Feel the bass, not the bulk — power your space with SMP200!

## Quick Answers

- **What is this?** OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max by osd audio
- **How much does it cost?** KD 403.95 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/385101495-osd-audio-smp300-class-d-digital-subwoofer-amplifier-rated-at)

## 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 Auto On/Off:** Senses audio signals to power on/off automatically, saving energy and hassle—never forget to switch off again.
- • **Space-Savvy Design:** Compact footprint fits discreetly anywhere, ideal for sleek, modern home theater setups without clutter.
- • **Powerful Bass Impact:** Delivers up to 200W max and 120W RMS for deep, distortion-free low frequencies that command attention.
- • **Precision Bass Control:** Adjust phase, crossover (35Hz-160Hz), and volume to tailor your bass experience perfectly.
- • **Universal Compatibility:** Works seamlessly with all receivers via RCA and speaker-level inputs for ultimate system flexibility.

## Overview

The OSD Audio SMP200 is a compact, highly efficient Class D digital subwoofer amplifier delivering up to 200W max power. Designed for home theater enthusiasts, it offers versatile connectivity with RCA and speaker-level inputs, adjustable phase, crossover, and volume controls for precise bass tuning. Its smart auto on/off feature enhances convenience and energy savings, while its small footprint ensures it fits effortlessly into any audio setup, making it the perfect upgrade for millennials seeking powerful, customizable bass without sacrificing style or space.

## Description

"If you’re ready to beef up the bass in your surround sound system, OSD Audio’s SMP300 is a Class D digital mono subwoofer delivers up to 300W of peak power to passive subwoofers so you can enjoy three dimensional surround sound from movie and music soundtracks. Designed for use with passive subwoofers such as in-wall subs that require external power, the SMP300 provides continuous, stable power but measures only 3” high so it can fit inside any equipment rack or cabinet. Moderately priced with high-end features, this compact sub amp includes variable low pass filter control for balanced and seamless sound quality as well as variable phase control for additional fine tuning. Multiple connection options include LFE input, line-level and speaker-level inputs to cover newer and old school source equipment.Variable Low Pass Filter and PhaseOSD Audio’s sub amp includes a front-panel variable low pass filter that allows you to adjust the upper frequency limit of the subwoofer to control the overlap of the subwoofer’s upper frequencies and the main speakers’ lower frequencies. This results in bass that complements the sound from the main speakers rather than overpowers. A front-panel variable phase control knob operates over a range from 0 degrees to 180 degrees and allows you to match the arrival times of the sound waves from the subwoofer and the main speakers. This fine-tuning results in bass that is less muddy or thumpy but rather smooth and detailed.Includes Class D Amp TechnologyThe SMP300 uses Class D digital amplifier technology that combines the best qualities of both Class A and B amp protocols into a highly efficient compact chassis 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. "

Review: It's a simple connect and play could not be any more simple. I hooked it up to a 10'' JBL Subwoofer and i am happy.
Review: 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.

## Features

- BRING ON THE BASS: A highly efficiency Class D subwoofer amplifier that serves up big bass with up to 300W 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 |
| Brand Name | OSD Audio |
| Customer Reviews | 4.0 4.0 out of 5 stars (167) |
| Included Components | Subwoofer Amplifier |
| Item Weight | 3.63 kg |
| Manufacturer | OSD Audio |
| Maximum Output Power | 300 watts |
| Model | SMP-300 |
| Mounting Type | Surface Mount |
| Number of Channels | 1 |
| Output Power | 300 Watts |
| Package Type Name | box |
| Part Number | SMP-300 |
| Specification Met | CE |
| UPC | 810281010946 |
| Unit Count | 1 Count |

## Product Details

- **Brand:** OSD Audio
- **Manufacturer:** OSD Audio
- **Mounting type:** Surface Mount
- **Number of channels:** 1
- **Output power:** 300 Watts

## Images

![OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max - Image 1](https://m.media-amazon.com/images/I/71lL+-FKfgL.jpg)
![OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max - Image 2](https://m.media-amazon.com/images/I/71B5AaxnbBL.jpg)
![OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max - Image 3](https://m.media-amazon.com/images/I/711XsNn055L.jpg)
![OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max - Image 4](https://m.media-amazon.com/images/I/71+CFvInkCL.jpg)
![OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max - Image 5](https://m.media-amazon.com/images/I/71GonLmr+BL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by M***N on 22 March 2021*

It's a simple connect and play could not be any more simple. I hooked it up to a 10'' JBL Subwoofer and i am happy.

### ⭐⭐⭐⭐⭐ Review
*by R***L on 14 January 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.

### ⭐ Review
*by A***R on 17 December 2025*

Product came from the USA so it took a little time but after receiving and installing it initially seemed to work OK. However, the trigger function is a problem. Connecting to an Arcam AVR20 Integrated Amp to sync power on/off. The trigger functions fails to operate, indeed there is a "buzzing/fizzing" sound coming from the SMP500 and sounds like a short-circuit... I immediately pulled the power cord fearing damaged to either my AVR20 or the SMP500. I checked the polarity, voltage and current of the trigger cable and AVR20 output and it is within spec ( AVR20 DC +12v 70mA, 3.5mm jack, tip +). and correctly wired. In the "On" mode, it works as expected but the "Music" mode should turn off when a signal is not present and on when a signal is detected, but it's unreliable, sometimes it does, others it doesn't. I attempted to find a support link to the manufacturer (OSD) but they only offer dealer support. On the Amazon order page there is no option to "ask a question", so I contacted customer service and the only option was to return the product, no help there. I suspect that it has a fault, or the labeling is incorrect (e.g. the + and - symbols are incorrect or specifications are wrong), can you please confirm the the product labeling is correct (+ and - and trigger in/out and switch setting 12v/On/Music). Setting the switch to "12v" and "External Trigger On" in the software setting is what I understand is correct but that can't be confirmed it seems. I have decided to keep the product but am concerned that it will be a problem in the future, a risk. The reason for only two stars is that there is no UK support, to even ask a question of. So after the 30 days Amazon option of return any warranty is useless it seems. Update. Now there's a pulsing noise emitting from the driver, even when the phono isn't connected. This noise is sufficiently load that I can hear it 15 feet away in the primary listening position during the quiet gaps in films/music. For a £600+ device this is unacceptable. Now being returned and reduced to one star, zero if there was an option.

## Frequently Bought Together

- OSD Audio SMP200 Class D Digital Subwoofer Amplifier Rated 200W Max
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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-05-19*