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Home / Product Category / SPEAKERS / In Wall Speakers / In Wall Subwoofers / OSD Audio SMP500 DSP Mono-Channel Class D Subwoofer Amplifier 800W, Auto Sensing, 4 -8 Ohm ETL and CE Certified

OSD Audio SMP500 DSP Mono-Channel Class D Subwoofer Amplifier 800W, Auto Sensing, 4 -8 Ohm ETL and CE Certified

Product code: SMP-500DSP

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OSD Price: $349.95
Compare at: $599.95 You Save: $250.00 (42%)
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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          


8 Questions & 8 Answers
from Omaha, NE asked:
April 21, 2019
What is the 8 ohm peak output? I saw you said it was rated 240W RMS continuous for 8 ohm, but what is the 8 ohm peak output?
1 Answer
Hi Chet: I would say the 8-ohm peak is a minimum of 500 watts. TL/5512
Submitted by: Tim Leahy on April 22, 2019

from Avon, IN asked:
April 6, 2019
The signal for this SMP500 originates at the receiver inside my house. The receiver has an RCA output for Sub 1 & Sub 2. The GLS8 only gets a signal when I use a RCA cable in both sub 1 & 2 connecting those to R & L on the SMP500. Sounds awesome what a great combination!! How can I send a signal to the GLS8 without having to use both outputs? I need one output for my interior sub. If I try to use a RCA splitter (Y) output from Sub 1 or 2 doesn't matter to both inputs on the SMP500 I do not get signal. I am also using a XMP300 for my exterior speakers. Any thoughts / help would be great thank you.
1 Answer
Hi James: I am assuming you are connecting the XMP300 to the Zone 2 output of the Audio Video Receiver. What you might consider is connecting the XMP500 directly to the signal level inputs of the SMP500 and the XMP300 from the XMP500 signal level outputs. The Sub output on the AVR is dedicated to the Surround Sound processed System. Connect that to your internal subwoofer. The external sub wants to see information destined for the External Zone 2. You could also try connecting Zone 2 to your Main Line input of the XMP300 and the SMP500 from the Mainline output of the XMP300. Try both options and see if either one shows a loss in signal strength. I am thinking the best connection is going to the SMP500 first. TL/5496
Submitted by: Tim Leahy on April 14, 2019

from Omaha, NE asked:
February 5, 2019
What is the power output specifications for this amplifier at 8 Ohm?
1 Answer
Hi Chet: 8-ohm rating: 240 watts Continous RMS 4-ohm rating: 400 watts Continous RMS 1000 watts peak You can connect two 8-ohm subs to get the 4-ohm power. TL/5399
Submitted by: Tim Leahy on February 6, 2019

from Front Royal, Va asked:
January 7, 2019
If you were to run 2x SL800D, could this amplifier handle that load or would you you need 2 SMP500 amplifiers?
1 Answer
Hi Alan: The SMP500 has plenty of power for a four-ohm load which is what the Amplifier would see when wiring two 8-ohm SL-800D subs in parallel. A perfect match. TL/5359
Submitted by: Tim Leahy on January 10, 2019

Kent Johnson
from Oklahoma asked:
January 1, 2019
Does this amp have a built in crossover?
1 Answer
Hi Kent: Yes, the SMP500 has a built-in Low Pass Crossover network with additional adjustments for Gain level, Phase and High Cut filter. It also has a remote control and DSP circuit that allows you to save up to three different EQ settings. Good choice TL/5351
Submitted by: Tim Leahy on January 6, 2019

Thomas Turk
from Vienna Audstria asked:
November 20, 2018
Is there any/much difference for sub-woofers, crossed over below 150Hz using a stereo amp or using this mono amp.. with same signal from both channels?, How many Watts for each channel would that give me into 8 Ohms
1 Answer
Hi Thomas: It depends on what Sub or Subwoofers you are connecting to, and if they have a crossover built in so, you can feed a direct full range signal. But this dedicated subwoofer amplifier provides a whole lot more control on the crossovers frequency range and slope that are selec=table. There are also 3 DSP presets available controlled at the front panel or by remote control. You can easily connect two 8 ohm subs for a 4-ohm load rated at 400 watts. Note low pass is typically mono from an AVR. The speaker level output is a single two-conductor which should be 12 gauge or higher. There is no comparison, no need to look any further. The amp is both multi-voltage and CE rated for European distribution. We do have an online dealer located in Norway; That has been adding our amplifiers to their mix. Good luck TL/5292
Submitted by: Tim Leahy on November 24, 2018

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
Submitted by: 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
Submitted by: Tim Leahy on June 17, 2018

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