Mobile Navigation
My Account


Call for Support
Home / Product Category / SPEAKERS / In Wall Speakers / In Wall Subwoofers / SMP500 Mono-Channel Class D Subwoofer Amplifier, Digital, Onboard DSP 400W 4 -8Ω ETL and CE Certified

SMP500 Mono-Channel Class D Subwoofer Amplifier, Digital, Onboard DSP 400W 4 -8Ω ETL and CE Certified

Product code: SMP-500DSP

In Stock
Free Shipping
OSD Price: $299.95
Compare at: $599.95 You Save: $300.00 (50%)
30-Day Money Back Guarantee

Features & Specifications

. Mono Class D Dedicated Subwoofer Amp
. 1000W Peak /400W RMS @ 4 ohm
. Variable High Cut Filter 30Hz-150Hz, front panel knob . Additional Front Panel Control: Phase Switch and Volume Control
. Choice of Signal Level Input or LEF (Low-Frequency Effects)
. Turn On Choice: Music Sensing, Manual On or 12V Trigger
. Adjustable Gain/Volume Control Limiter
. Signal (low level) and Speaker Level (high level) inputs
. 110/220V switchable ETL, CE
OSD Audio SMP500DSP Class D Subwoofer Amp is designed for use with higher wattage passive subwoofers such as in-wall subs that require external power. It is rack mountable and 1U chassis. This sturdy sub amplifier is not for the faint of heart. It serves up 1000 watts of power peak and 400W RMS @ 4 ohms, so to say that it is powerful is an understatement.

You'll experience deep, rich and crisp bass while watching your favorite movies, especially action and adventure flicks. A big bang for the buck, features include a front-mounted power meter, back panel adjustable gain and volume control limiter to protect the woofers as well as low-level and high-level pass-through input/outputs to cover newer and old school sound systems. Combining the best qualities of both class A and B amp technologies, distortion is low while efficiency is high, and the SMP500DSP Mono Amp also includes a variable high cut filter that routes higher frequencies to main speakers. This allows subs to concentrate on the low-frequency sound effects for which they are designed and keeps low bass away from your surround speakers for much cleaner highs and midrange.

This sub amp does more than just supply power. You'll notice an improvement in the overall sound quality of your entire home theater surround sound system.




  View Owner's Manual          


2 Questions & 2 Answers
from Largo Florida asked:
October 25, 2018
Can this unit be used in full range mode? Considering 2 of these and your preamp one.
1 Answer
Hi Patrick: The SMP500 is a dedicated Subwoofer Amplifier that can power two 8 ohm Subwoofers in Parallel like our GLS-8; 8.0" in-ground sub. The new XMP300 would make a nice combo along with the Pre-One. The XMP300 can also power a couple of Pair of 8-ohm speakers. I would connect the Pre-1 to the SMP500 and then to the XMP300. That would give you 400 watts for your Subs at 4 ohms and 225 watts for the XMP300 at 4 ohms as well. Let me know if can help with your system? TL/5260
Tim Leahy
on October 25, 2018

from Poland, OH asked:
June 11, 2018
What does the remote do for the amp? I am assuming on/off, volume. Anything else? Thank you
1 Answer
HI John: You can see an image of the IR Remote Control in the Owner's manual; It works in conjunction with the Digital display on the front. It features the usual suspects: Power On/Power Off, Volume Up/ Volume Down, Menu-Enter, Scroll Right/Scroll Left, Mute, Exit, There a number of settings in the menu that you can configure High pass filter, Low pass Filter, Change the slope from 0 to 48dB plus adjust the Phase Mode. You can save up to three different settings in the store 1, store 2, or store 3 buttons. Then you have a recall button for each corresponding store button. So you would store the settings/memory on store 1 button and you would need to push recall 1 button to listen to the amp with those settings. The last three buttons are Flat (no equalization) and then Night Mode On/Night Mode off. Night Mode: Limits the dynamic range of the amplifier so the louder context of the source signal is reduced. This feature allows the user to select night mode. Choose either enable or disable. I will post infographics with more info on the remote including the hex codes in case you want to control it with a universal remote. TL/5047
Tim Leahy
on June 17, 2018

Product Reviews