--- product_id: 371003575 title: "OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100)" brand: "osd audio" price: "€ 29.85" currency: EUR in_stock: false reviews_count: 5 url: https://www.desertcart.sk/products/371003575-osd-audio-smp100-subwoofer-amplifier-100w-class-d-digital-subwoofer store_origin: SK region: Slovakia --- # Class D High Efficiency Compact 12x14x5 cm 100W Peak Power OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) **Brand:** osd audio **Price:** € 29.85 **Availability:** ❌ Out of Stock ## Summary > 🎶 Tiny Amp, Titanic Bass — Feel Every Beat! ## Quick Answers - **What is this?** OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) by osd audio - **How much does it cost?** € 29.85 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/371003575-osd-audio-smp100-subwoofer-amplifier-100w-class-d-digital-subwoofer) ## 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 - • **Multi-Use Amplifier:** Powers both subwoofers and in-ceiling speakers, making it a versatile addition to any home theater setup. - • **Cool & Compact Design:** Class D tech keeps it efficient and cool in a sleek form factor under 6 inches wide—fits anywhere. - • **Precision Bass Control:** Adjust phase, crossover (35Hz-160Hz), and volume to tailor your perfect bass profile. - • **Room-Shaking Bass Power:** Delivers up to 100W peak for deep, crisp low frequencies that transform your audio experience. - • **Universal Compatibility:** Works seamlessly with all receivers via RCA and speaker-level inputs for ultimate system flexibility. ## Overview The OSD SMP100 is a compact yet powerful 100W Class D digital subwoofer amplifier designed for home theater and whole-house audio systems. Featuring adjustable crossover, phase, and volume controls, it delivers precise, room-shaking bass while maintaining high efficiency and a small footprint. Compatible with all receivers through RCA and speaker-level inputs, it also doubles as a distributed amplifier for in-ceiling speakers, making it a versatile, budget-friendly powerhouse for audiophiles seeking premium low-frequency performance. ## Description OSD Audio's Class D Digital Subwoofer Amplifier is a compact 100W amp designed to power passive subwoofers used in a home theater or whole-house audio system. We call this our “tiny but mighty” powered sub because it measures less than six inches wide but supplies an in-wall or stand-alone subwoofer the power it needs so you can experience room-shaking low-frequency impact (bass) on movie and music soundtracks. The advanced crossover circuit can be set at different frequency ranges (35Hz to 160Hz) and is adjustable with a front-panel control knob. Other features include the front-panel adjustable phase and volume controls to dial in just the right amount of low-frequency effects (LFE). The SMP100 uses Class D amplifier technology that combines the best qualities of both Class A and B amp protocols into a highly efficient and compact digital design 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. With both RCA and speaker level connections, the SMP100 also acts as a distributed amplifier and will power a pair of in-ceiling speakers in addition to a sub. ## Features - BRING IN THE BASS: A highly efficiency subwoofer amplifier that serves up big bass with up to 100W peak/40W RMS for deep, crisp, clean low frequency sound effects - WORKS WITH ALL RECEIVERS: Compatible with older and newer source equipment and includes both RCA and speaker level input/outputs for greater flexibility with various home theater audio systems - ADJUSTABLE CONTROLS: Includes auto on/off sensing as well as phase, crossover and volume controls to dial in just the right amount of bass Key Product Features - 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 less than 6 inches wide and 5 inches deeps so it can fit just about anywhere ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07HJDQ8Q3 | | Brand Name | OSD Audio | | Customer Reviews | 4.2 4.2 out of 5 stars (131) 4.2 out of 5 stars | | Included Components | Subwoofer Amplifier | | Item Dimensions | 12.1 x 14.2 x 4.6 Centimeters | | Item Weight | 1.75 Pounds | | Manufacturer | OSD Audio | | Material Type | Plastic or Lightweight Metal | | Maximum Output Power | 100 watts | | Model Number | SMP-100 | | Mounting Type | Freestanding | | Number Of Channels | 1 | | Number Of Items | 1 | | Output Power | 40 Watts | | Package Type Name | Box" or "Retail Packaging | | Part Number | SMP-100 | | Specification Met | Etl, Ce | | Unit Count | 1.0 Count | | Upc | 819603019377 | ## Product Details - **Item dimensions L x W x H:** 12.1 x 14.2 x 4.6 Centimeters - **Manufacturer:** OSD Audio - **Mounting Type:** Freestanding - **Brand:** OSD Audio - **Number of Channels:** 1 ## Images ![OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) - Image 1](https://m.media-amazon.com/images/I/713AFgP-VOL.jpg) ![OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) - Image 2](https://m.media-amazon.com/images/I/615PL9nIzTL.jpg) ![OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) - Image 3](https://m.media-amazon.com/images/I/61VO4VkcozL.jpg) ![OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) - Image 4](https://m.media-amazon.com/images/I/71d95OIZmjL.jpg) ![OSD Audio SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max, Black (SMP-100) - Image 5](https://m.media-amazon.com/images/I/71iEjNbhfjL.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. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent Quality at a Low Price *by on Reviewed in the United States 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. ### ⭐ It's good, but... No, it's bad. *by on Reviewed in the United Kingdom 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. ### ⭐⭐⭐⭐⭐ Works well! *by on Reviewed in the United States 28 May 2026* Works well powers my passive subwoofer (same brand) like a movie theatre ! ## Frequently Bought Together - OSD SMP100 Subwoofer Amplifier 100W Class D Digital Subwoofer Amplifier Rated 100W Max - OSD Nero IWSDUAL8 in Wall 300W Subwoofer Dual 8" Graphite Cones Magnetic Grill --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/371003575-osd-audio-smp100-subwoofer-amplifier-100w-class-d-digital-subwoofer](https://www.desertcart.sk/products/371003575-osd-audio-smp100-subwoofer-amplifier-100w-class-d-digital-subwoofer) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-08-15*