--- product_id: 753821579 title: "OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max" brand: "osd audio" price: "AR$2951802" currency: ARS in_stock: true category: "Osd Audio" url: https://www.desertcart.com.ar/products/753821579-osd-audio-smp300-class-d-digital-subwoofer-amplifier-rated-at store_origin: AR region: Argentina --- # 800W peak power punch Variable high-cut filter control Front/back panel adjustable gain OSD Audio SMP300 Class D Digital Subwoofer Amplifier Rated at 300W Max **Brand:** osd audio **Price:** AR$2951802 **Availability:** ✅ In Stock ## Summary > 🎬 Feel every beat, command every room with SMP500 power! ## 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?** AR$2951802 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/753821579-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 - • **Power that Moves You:** Delivers a commanding 400W RMS @ 4Ω for deep, room-shaking bass that transforms your home theater experience. - • **Effortless Integration:** Low and high-level pass-through inputs/outputs provide seamless compatibility with both legacy and modern audio systems. - • **Precision Bass Control:** Variable high-cut filter and phase switch let you tailor low-frequency output, ensuring crystal-clear mids and highs. - • **Smart & Efficient Design:** Class D technology keeps the amp cool and efficient, with auto-sensing power on/off to save energy and extend component life. - • **Ready for the Rack & Remote:** Rack-mountable form factor with included remote control for professional setup and convenient operation. ## Overview The OSD Audio SMP500DSP is a robust mono Class D subwoofer amplifier delivering 800W peak and 400W RMS at 4 ohms. Designed for high-wattage passive subwoofers, it features a variable high-cut filter, phase control, and adjustable gain for precise bass tuning. Its efficient, cool-running design includes auto-sensing power, low/high-level pass-through, and a rack-mountable chassis with remote control—perfect for elevating home theater and media room sound quality with deep, distortion-free bass. ## 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. " ## 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. ## 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 - OSD Premium 12" Outdoor Subwoofer 600W, In Ground Omni Directional, IP66 Weather Resistant Black XSUB12 - OSD Forza 6.5" Landscape In Ground/Mountable 80W Speaker, Commercial 70V Tap, Outdoor Weather Resistant, Bronze (Single) --- ## 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.com.ar/products/753821579-osd-audio-smp300-class-d-digital-subwoofer-amplifier-rated-at](https://www.desertcart.com.ar/products/753821579-osd-audio-smp300-class-d-digital-subwoofer-amplifier-rated-at) --- *Product available on Desertcart Argentina* *Store origin: AR* *Last updated: 2026-05-21*