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OSD Audio SMP500 Class D Subwoofer Amplifier, 800W Max Power, Digital Mono Amp with DSP for Passive Subwoofers, LED Display/Remote, LFE Line-in

  • Based on 198 reviews
Condition: Used - Very Good
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Availability: Only 1 left in stock, order soon!
Fulfilled by Amazon

Arrives Jul 5 – Jul 22
Order within 11 hours and 53 minutes
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Size: 500W DSP


Style: Digital


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.

Features

  • The SMP500 is designed for use with higher wattage passive subwoofers that require external power with up to 1000 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.

Item Dimensions LxWxH: 15 x 5 x 6 inches


Voltage: 220 Volts, 12 Volts


Manufacturer: OSD Audio


Brand: OSD Audio


Number of Channels: 1


Product Dimensions: 15 x 5 x 6 inches


Item Weight: 8 pounds


Manufacturer: OSD Audio


Item model number: SMP500DSP


Is Discontinued By Manufacturer: No


Date First Available: July 5, 2018


Item dimensions L x W x H: 15 x 5 x 6 inches


Voltage: 12 Volts, 220 Volts


Manufacturer: OSD Audio


Maximum Supply Voltage: 220 Volts


Mounting Type: Surface Mount


Voltage: 12 Volts, 220 Volts


Maximum Supply Voltage: 220 Volts


Mounting Type: Surface Mount


Number of Channels: 1


Output Power: 400 Watts


Package Type Name: cardboard box


Item Dimensions: 15 x 5 x 6 inches


Specification Met: Etl Rated


Manufacturer: OSD Audio


Model: SMP500DSP


Brand Name: OSD Audio


Warranty Description: 2-Year Warranty


UPC: 819603013177


Part Number: SMP500DSP


Item Type Name: Subwoofer Amplifier


Item Weight: 8 Pounds


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Jul 5 – Jul 22

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Great sounding amp
Size: 500W DSP Style: Digital
Coupled with the OSD 12” sub and it’s a fantastic sounding amp.
Reviewed in the United States on June 12, 2026 by SHorton

  • Super delgado
Size: 500W DSP Style: Digital
Es compacto
Reviewed in the United States on June 28, 2025 by LUIS IXCOY

  • Awesome amp
Size: 500W DSP Style: Digital
I am using this to drive 2 Forza10 subs, the sound is amazing using this amp and the control settings are great, highly recommend. Can never have too much power.
Reviewed in the United States on April 7, 2021 by TM68

  • Nice class-D amp
Size: 500W DSP Style: Digital
I just wished it was WiFi controls instead of a ir-remote
Reviewed in the United States on July 3, 2021 by Mike Bohnet

  • Dead on arrival
Size: 500W DSP Style: Digital
This amp arrived dead. It would power up, lights came on, but no output to my speaker. I worked with OSD's customer service and Amazon's, and both confirmed it was dead. I returned it and went with a lower power amp from Parts Express that cost less, yet it's much larger, heavier and looks more expensive. It's performed great with zero issues. I have a feeling these OSD amps are high margin cheap junk that don't do rated power. ... show more
Reviewed in the United States on November 17, 2021 by Chris A. Johnson

  • Very nice.
Size: 500W DSP Style: Digital
Paired with the 12” in ground sub. Awesome sound!
Reviewed in the United States on July 1, 2023 by Amazon Customer

  • You get what you pay for
Size: 500W DSP Style: Digital
See the picture? You will not be getting two separate units. Besides this, it is a powerful unit. In combination with the sub-woofer being offered the sound will be awful. Don't know which one is the problem. The Sub-woofer or this pre-amp. You would think that these units which are being sold by the same distributor would be a perfect match. Not at all. Bottom line: poor sound at mid-level will have you playing with the controls hoping to get better sound. You won't. ... show more
Reviewed in the United States on April 26, 2019 by Manuel Dotel

  • Great power for a huge back yard with 2-12s Great power for a huge back yard with 2-12s
Size: 500W DSP Style: Digital
Love this amp, powers my 2 OSD 12s easily
Reviewed in the United States on May 28, 2022 Reviewed in the United States on May 28, 2022 by Amazon Customer

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