OSD Audio SMP200 Mono Subwoofer Amplifier - 200W
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Delivery £4.50 or Free Over £50
Delivery £4.50 or Free Over £50
All orders to mainland UK over £50 are eligible for free standard delivery.
For orders under £50 we have delivery rates starting from just £2.99
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60 Day Returns + 2 Years Warranty
60 Day Returns + 2 Years Warranty
We’re so confident that you’ll be happy with your purchase that we’ve extended our returns policy to 60 days.
We call it the “Happy Sound Guarantee”.
If you’re not happy with your purchase for any reason simply send it back to us for a full refund. Learn More
Warranty
K&B Audio are authorised dealers for OSD Audio. All sales come with a 2 Years manufacturers warranty and full technical support.
Description
Description
Delivering deep, controlled bass for home cinema and audio systems, the OSD Audio SMP200 is a compact yet powerful mono-channel subwoofer amplifier.
Designed to drive passive subwoofers with precision, this high-efficiency Class D amplifier outputs up to 200W of low-frequency energy, ideal for enriching your music, movies, or gaming experience.
Whether you're upgrading your home theatre setup or powering an in-wall or in-ceiling subwoofer, the SMP200 ensures tight, distortion-free bass.
Built for flexibility and performance, it features both line-level and speaker-level inputs, an adjustable low-pass filter, and a variable phase control to fine-tune bass response.
Its compact design allows for discreet installation, making it perfect for media rooms, lounges, or dedicated cinema spaces.
FEATURES
- 200W Peak Class D Power: Efficiently powers passive subwoofers with up to 200W for deep, room-filling bass.
- Compact Design: Easily fits into AV cabinets or tight spaces, perfect for home installations without clutter.
- Variable Crossover Control: Tailor the subwoofer’s output with an adjustable low-pass filter (30Hz–150Hz) to seamlessly blend with your main speakers.
- Speaker & Line-Level Inputs: Flexible connection options for compatibility with most home audio systems.
- Auto Signal Sensing: Automatically turns on when it detects an audio signal and powers down when inactive, improving energy efficiency.
- Phase Adjustment Dial: Adjust phase (0°–180°) to align your subwoofer with other speakers, ensuring optimal sound integration.
- High Current Output: Capable of driving 4-ohm subwoofers for more power and performance in demanding setups.
- Front Panel Volume Control: Easily adjust the subwoofer level without reaching behind AV furniture.
- Protection Circuitry: Built-in safeguards against overheating and short circuits maintain system longevity.
- Gold-Plated Terminals: Ensures secure, corrosion-resistant connections for reliable long-term use.
Key Features
Key Features
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InputsRCA
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OutputsSpeaker Terminals
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Warranty
Specifications
Specifications
What You Get
What You Get
Downloads
Downloads
Payment & Security
Secure Payments
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Authorised Dealer
K&B Audio are authorised dealers for OSD Audio. All sales come with a 2 Years manufacturers warranty and full technical support.

Why K&B Audio
Over a Decade of Experience
Established in 2013, we’ve been helping customers enjoy hassle-free home audio for more than 10 years.
Shop with Confidence
Our 'Happy Sound Guarantee' guarantees you expert advice, 60 day returns and free delivery on orders over £50.
35,000+ Satisfied Customers
We’ll always help you find the right solution for your needs, not just what boosts our bottom line. Don’t just take our word for it – read our glowing customer reviews.
Extensive Product Range
With the top brands, carefully curated bundles and thousands of home audio products in stock, we’ve got something for every setup.