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Home / Product Category / AMPLIFIER / Subwoofer Amplifiers / OSD Audio SMP250 Mono High Current Class A/B Subwoofer Amplifier with 250 Watts of Power

OSD Audio SMP250 Mono High Current Class A/B Subwoofer Amplifier with 250 Watts of Power

Product code: OSD-SMP250

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Features & Specifications

If you're looking for a subwoofer amplifier, Outdoor Speaker Depot has you covered. The SMP250 Mono Subwoofer Amp features variable low-pass crossover, easily accessible volume control and a low-frequency effect input. It's designed for use with higher wattage passive subwoofers so you can tighten the level of the bass signal. You can even use the high-pass ins and outs to send the signal back into your sound system.

OSD Audio’s SMP250 Mono Subwoofer Amp gives passive subwoofers up to 250 watts of power so you can experience all the crashes, crunches and car chases with spine-tingling exhilaration. Designed for use with higher wattage passive subwoofers such as in-wall subs that require external power, the SMP250 Mono Subwoofer provides stable power and enhances the low frequency sound effects. Moderately priced with high-end features, this sub amp includes a variable high cut filter that routes higher frequencies to main speakers so subs can concentrate on the low frequency sound effects they are designed to handle. The result is bass that does not sound muddy or overly thumpy but rather crisp and detailed. You’ll immediately feel and hear the difference. Other features include a 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.

Why Do You Need Subwoofer Amp?


If you have a powered subwoofer, you don’t. A powered subwoofer has its own internal amplifier which is why they are extremely heavy to lift. A passive subwoofer is simply a woofer or woofers in an enclosure that is designed to handle low frequencies but does not have an internal amplifier, which is why they are not heavy to lift. In-wall subs are most commonly passive. After all, it’s not so easy to install a 100-pound sub inside a wall. That’s where an amp like the SMP250 Mono Subwoofer Amp comes into play. This amp not only adds necessary power but the high-cut filter keeps low bass away from your surround speakers, which in turn gives you much cleaner highs and midrange. This subwoofer amp does much more than supply power. It also improves the overall sound quality of your entire surround sound system.

What Is A Class A/B Amplifier?


In home theater, Class A/B are the most common because they combine the efficiency of Class B with the sound quality of Class A amps. A Class A amplifier uses the input signal 100% of the time, which means that the output signal to your sub matches the input signal from your receiver. The result is virtually no clipping or distortion. Sounds perfect, right? The downside is that Class A amplifiers run very hot because the transistors are working all the time. Class B amplifiers only amplify half of the input signal which creates some distortion but these amps are far more efficient than Class A amplifiers and run a lot cooler. A Class A/B amp combines the best of A and B, so distortion is lower yet efficiency is high so sound quality is truly maximized.

Specifications

OWNER'S MANUAL

  View Owner's Manual          

QUESTIONS & ANSWERS

27 Questions & 27 Answers
Jon
from Lowry, SD asked:
November 10, 2016
We have had this amp installed for less than 2 months and it won't turn on. Any suggestions or has anyone experienced this? Could it be the power switch?
1 Answers
HI Jon: I am sorry to hear you are having issues. Has the unit ever worked or produced sound? Does it light up (Blue is active and Red is in standby on the front panel). If the panel light is red there may be a short and the amplifier might be in protection mode (check your cables) What is the turn on option set to? Trigger/Auto On/Normal; This should be set to Normal which is controlled by Front power switch. Your input for single source should be Line 2 Input (RCA Input low or signal level)? What source are you using? Did you adjust your Master Level Right and Left knobs (with screwdriver) Make sure front volume control is wide open turned all the way clockwise. Did you check the internal fuse located in AC plug outlet on right side of back panel? Still dead, contact our RMA department. Good Luck: TL/4122
Customer Service - Q&A
on November 10, 2016

cesar
from Florida asked:
December 21, 2015
I need your help to know what product is the correct for me. I have 2 passive subwoofers SONY (from Sony muteki 5.2 model HT-M5 or well SRT-KM5 home theater) in this case the model of my 2 subwoofers are SS-WP7M, they are for 4 Ohms. Recently I purchase a new Sony Receiver 7.2 STR-DN850 model but as this receiver only offer outputs for subwoofers by 2 RCA. I find some info for my subwoofers: Sony reports that they are to support 280 RMS in 4 ohms, 100 Hz with THD 30%, and 175 Rms in 100 Hz with best THD of 10%. -- REALLY I DON'T KNOW if the OSD250 is my right solution to support BOTH subwoofers and offer at least 150 RMS for each one or I need 2 OSD250 amplifiers ?, I appreciate your help and suggestions about to define the right amplifier to convert them from passive to Active Subwoofers. I you have questions please let me know to can give more information...Best Regards.
1 Answers
Hi Cesar: I would recommend purchasing one SMP-250 and connecting the two sub woofers in series since they are both 4 ohm. You would connect the (+) positive output from the SMP-250 to (+) positive input of the first sub woofer. Then connect the (-) negative input of the first sub-woofer to the (+) positive input of the second sub-woofer. Then connect the (-) negative output of the second sub-woofer back to the (-) negative output of the SMP-250. That would be the most affordable solution and the amplifier should see a 8 ohm load. Play that for awhile and see if the output is satisfactory. To get more bass/output you would need to have two SMP-250 amps, one for each speaker. You will get the most output since each 4 ohm speaker will increase the output closer to 250 watts. TL/3628
Customer Service - Q&A
on January 20, 2016

Joe
from Canada asked:
November 21, 2012
Can this amp run both subwoofers rated at 150W each?
1 Answers
Hi Joe, The bigger concern when trying to match a pair of woofers to a sub amplifier is the Impedance Rating of the subs not the power handling. I am assuming you are using two 8-ohm drivers for home (car audio uses mostly 4 ohm drivers). When you connect both 8-ohm subs in parallel, you will increase the output of the SMP250 so you will have plenty of current to drive both subs. The SMP250 is a High Current Amplifier that will work in a 4-ohm load, which is what the impedance drops to when connecting two eight ohm drivers in parallel. Connect both the Positives to the Positive Output and both of the Negatives to the Negative Output. In Series, connect the Positive from the amplifier to the first Subwoofer's Positive connection then connect the Negative from the First sub to the Positive of the second sub. The Negative from Second Sub is then wired back to the Negative Output from the SMP250 amplifier. This creates a 16-ohm load and drops the output of the amplifier in half. Let us know if this helps. TL/MA - 1398
Customer Service - Q&A
on November 23, 2012

Jessy
from Miami, FL asked:
August 2, 2017
I have installed the IWS10 woofer in my wall, powered by the SMP250. Every time I play a movie with a lot of bass or lows, I get a crackling sound , like a feed back from the woofer. At low volumes its fine, its just when I turn it up loud that I get this to happen. Any help will be appreciated.
1 Answers
Hi Jessy: If you are connected to the LFE (Low Frequency Effects) output from your Receiver then your gain control on the front panel needs to be set to middle (12:00 o'clock). If your volume level is controlled by the Receiver for the sub as well then you need to turn the gain down as well. It sounds like its clipping. If the driver was blown it would be scratching at any volume. We will try and duplicate the problem. TL/4502
Customer Service - Q&A
on August 4, 2017

Dave
from Georgia asked:
July 11, 2017
Would this amp be stable to run two 4 ohm speakers in parallel? Wouldn't that be a 2 ohm load? Thanks.
1 Answers
Hi Dave: The SMP250 will connect two 8 ohm subs so it sees a 4 ohm load. Two 4 ohm subs will be too much (2 ohm load as you noted). Wiring them series will work but you will not get the output you are looking for from the two subs. Now ohm woofers and connected them in Series Parallel you would have a 4 ohm load and lots of sub. TL/4466
Customer Service - Q&A
on July 20, 2017

Goran
from Flagstaff, az asked:
July 4, 2017
Are there rack mount ears available. There are obviously threads for such, but they are not included.
1 Answers
Hi Goran: We do not currently stock rack mount ears. But they are available from our factory and will order a small quantity to have on hand. Check back with us in about 30 days. TL/4449
Customer Service - Q&A
on July 13, 2017

tim
from mn asked:
April 9, 2017
does this sense inactivity and turn off on its own ?
1 Answers
HI Tim: Yes this amplifier can be set to Music or auto sensing making sure that the manual on off switch on the front is pushed on. Then as long as the amp sees a signal it will play.. If the source or signal is turned off the amp will go into stand by mode until it sees another signal. It usually takes 5 minutes for there to be no signal before going into stand by mode. Note, the three way switch is labeled Trigger. Music is the Auto signal sensing, Manual switch on the front needs to be on. When the trigger switch is set to On than the front manual switch turns the signal on or off, it has to be done manually. Then in the 12V setting the manual switch needs to be on as well but now the 12 V trigger will send a signal to turn on or off, again the manual switch must be left in the on position. TL/4299
Customer Service - Q&A
on April 12, 2017

Billy
from NM asked:
March 8, 2017
Hi, On occasion, the subwoofer goes out. If I turn the amp off and back on, it comes back fine. Any idea what can can cause it to stop operating? Impedence mis match? One clue, when the sub stops operating, the direct line out on the RCA outputs operates fine. The sub I'm using is the NILES GSS10 inground sub. Thanks!
1 Answers
Hi Billy: When the amplifier goes out have you touched the chassis to see if it hot to the touch. Sometimes there is an issue with impedance matching where the impedance drops and the current demand goes up which is accompanied by heat the extra current produces. The circuit board heats up and trips the Thermister (heat sensor) which puts the amp in stand by mode until the heat dissipates so the amp is back to safe operating mode. The RCA is a direct pass through from the RCA inputs, they do not go through the Power Supply or amplifier since they are an already amplified signal. Also what is your level setting on the back, the adjustment knob between the trigger switch and LFE input. Try backing that knob counterclockwise down (adjust it with your Volume Knob located on the front panel at full output). You use a Phillips head screw driver to adjust. Make sure your source is at a level where the sound is starting to clip and distort.(no higher than you would normally listen to it). Now turn the level control down where it is no longer clipping. So now you control the SMP250 with the Volume level on the front. Note if you are using the LFE input then your front volume level should be left at half way. The Volume will be controlled by the source bypassing the Volume, Crossover Filter and Phase switch all together . TL/4243
Customer Service - Q&A
on March 31, 2017

paul
from purcellville, va asked:
October 14, 2016
Hello, how would I wire this to the Polk Audio Atrium Sub1- (https://www.polkaudio.com/atrium-sub10/d/1072C2901) which has dual voice coils at 8 ohms? Thanks!
1 Answers
Hi Paul: Correct me if I am wrong I am thinking the Atrium Sub Woofer has an internal crossover built in. And you might want to look at our AMP200 instead of the SMP250. The AMP200 would provide a stereo signal to connect to your dual voice coils where as the SMP250 is a Mono amplifier. You need a right and left signal to the sub. The Sub has a Low Pass Crossover that will blockout all high frequencies. TL/4093
Customer Service - Q&A
on October 14, 2016

James
from Minnesota asked:
October 10, 2016
Since this amp does not have an auto off feature, do you have to manually turn it off after every use? Asked another way, will it harm the amp to be left on all the time so it is ready to go whenever the system is turned on? Thanks.
1 Answers
Hi James: Good question, and I have a better answer. There are actually three turn on/off options. First is manually turning on the power switch on the front for all three options. On the back of the amp you have switch labeled Trigger and three positions for the switch, the left is labeled Music; this is an auto sensing choice. When you turn the music off after a 5 to 15 minute delay the amplifier will go into standby. Once you turn the music back on the amp will sense the signal and turn back on. In the second or middle position (On) that is on when all the time unless you push the on/off button in for on and out for off. The third option is a 12 volt trigger that you might connect to another component either Receiver or amplifier. Our Amp 200/300 have a 12 volt trigger in and out that would be hardwired with an aux cable Male 3.5mm to 3.5mm Male. I hope that helps. TL/4089
Customer Service - Q&A
on October 14, 2016

Justin
from Georiga asked:
October 10, 2016
I have a Yamaha 681 receiver. It has two sub outputs. I have also purchased this amp with two iws10 I am seeking the best hook up method for going from the receiver to the amp to the speakers. If you can please include as much detail regarding wires/adapters and settings as possible... Thank you for your time and input.
1 Answers
Hi Justin: The SMP250 connects to the Yamaha 681 AVR to the Subwoofer Output Jack #1. I believe the connection is a 3.5mm RCA (like your Headphone jack of your phone). It does not specify. But there are 3.5mm adapter cables to RCA to plug into the right and left input of the SMP250. Then you connect the two IWS10 in Parallel to the Red and Black Mono output of the SMP250. You can either run both 2 conductor cables back from the respective IWS10 to the output connecting both positive to the red positive Binding post then the two negative conductors to the black output connector of the SMP250. Or you can run one 2 conductor from the output of the SMP250 to one of the IWS10 sub woofer speaker then run a second 2 conductor cable from the input connection of the first IWS10. I would run the biggest wire available (we have a CL3 FT4 12 Gauge two conductor or 14 gauge). It is also a good idea to create a back box behind the IWS10. At least fill the cavity with Fiber fill if nothing else. You will only need the single sub woofer pre amp out from the Yamaha. TL/4087
Customer Service - Q&A
on October 14, 2016

Noe Bodie
from USA, USA asked:
June 30, 2016
Does this have a subsonic or HPF? what is the frequency response?
1 Answers
Hi Noe: This Sub Amplifier does not feature either a Subsonic or High Pass Filter. It does feature a variable Low Pass Filter from 180Hz down to 35Hz. Frequency Response would be 20Hz to 180Hz. I believe the signal level outputs as well as the High Level outputs are full range with no Crossover High or Low pass effect. The Amplifier does feature a LFE (Low Frequency Effects input) for connecting to a Audio Video Receiver that features a dedicated sub-woofer output. When using the LFE input the crossover and phase switch are by-passed. TL/3963
Customer Service - Q&A
on July 5, 2016

Rich Hougey
from Concord, CA asked:
June 18, 2016
My backyard system consists of 6 JBL Control Contractor Series speakers and 2 OSD in-ground speakers. I want more bottom end. I am planning to build my own weatherproof sealed sub enclosure to be mounted in an area that is already protected from the weather by the structure of the house. Because I am familiar with the product, I was thinking of using one or two Kicker Solo Baric L7's or similar (4 ohm). My wife does not let me run this system at high volumes, it is normally used for background music. I am wondering if this amp has enough power to drive a sub of this type. I notice the specs do not give power ratings for 4 or 8 ohm respectively. what are the peak and continuous outputs for 4 ohm loads?
1 Answers
HI Rich: This SMP250 is rated at 250 watts RMS at 8 ohm and maybe 250 watts at 4 ohm. The Kicker Solo Baric woofers are either dual 2 ohm or dual 4 ohm. The 8" is 300 W, 10 is 500 W, 12 is 750 watts and 15 will hit 1000 W. In order to get a 4 Ohm load you would need to Series a dual 2 ohm driver. While using a Dual 4 ohm parallel would create a 2 ohm load and wired in series would equal 8 ohm. You would need to be 4 ohm to get the most out of the amplifier but not sure if it would be stable especially since the 8 inch speaker is 84 db (sensitivity) meaning it would not be very efficient needing even more power to get it going. Ironically we are developing a more powerful Sub amplifier with digital processing, IR remote and USB to RS232. But for now we do not have an amp for your application (or at least one that will work with a Car Audio Sub like the Kicker Solo Barics). Sorry about that TL/39040
Customer Service - Q&A
on June 21, 2016

'
from ' asked:
April 17, 2016
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1 Answers
dfgdfg One of the many products of repeatedly smashing the keys of a computer in boredom/frustration/stupidity. The cyber equivalent of a chipmunk screaming in anger. So that has been established, now how can I help you? TL/3818
Customer Service - Q&A
on April 18, 2016

John
from New York asked:
March 23, 2016
Would this work with Niles GSS10 subwoofer?
1 Answers
Hi John: This Amplifier would work just fine. The Sub woofer is rated at 50 to 500 watts but the real key is it's sensitivity which is 110dB which means it is really very efficient and does not need a lot of current to make them pound. Good choice TL/3777
Customer Service - Q&A
on March 24, 2016

Chad
from California asked:
January 22, 2016
Hi, i just bought a smp250 and i connect to a polk audio atrium sub10, the sound is bad, the low pass filter doesnt work... its something wrong whith the amp? i connected at 16 ohms because the atrium has 2, 8 ohms voice coils..
1 Answers
Hi Chad, You would need to wire the woofer in parallel, so it runs at 4 ohm. 16 ohm would not be getting enough output from the SMP250. CS 3669
Customer Service - Q&A
on January 22, 2016

Carl
from San Ramon, CA asked:
January 20, 2016
I have a bad amp panel on my Infiniti TSS-1200 system so the subwoofer now needs a new amp and wanted to know would this amp work well for JUST the subwoofer via LFE input? I will not be using this amp for anything else but the subwoofer. Subwoofer specs: Subwoofer Low-Frequency Driver: 12" MMD Subwoofer Amplifier Power Output: 250 watts RMS, 500 watts peak Subwoofer: 29Hz – 150Hz (+/–3dB) Subwoofer Crossover Frequency: 50Hz - 150Hz, 24dB/octave, continuously variable
1 Answers
Hi Carl: At first glance the question would be yes. But the concern is that you mentioned a bad amp panel. I am assuming the actual sub woofer for the system is powered by its own internal amplifier. So are you removing the amp panel form the back of the sub and looking to connect directly to the sub from the SMP250? Then connect the LFE from the AVR Receiver that you are using currently. If that is the case it should work... TL/3667
Customer Service - Q&A
on January 22, 2016

rod rodrigues
from Oakland, CA asked:
December 18, 2015
I have a SMP250 amp connected to two passive subwoofers, which work great. I am curious is it possible to connect the 12v trigger to my Sony STR-1050 receiver so that when I turn my receiver on, the amp comes on.
1 Answers
Hi Rod: I do not believe the Sony has a 12 volt turn on trigger. It does feature a IR in.out but not sure if that would work with our SMP-250. Sorry about that TL/3626
Customer Service - Q&A
on January 20, 2016

Bally
from Roseville, CA asked:
January 30, 2015
I am thinking about setting up a in-wall sub and looking at the diagram of one of the subs on your site it shows you connect the red to red, black to black from sub to amplifier output. So my first question is would it matter if the right output was used or does it have to go in the left on the SMP250? Also on the diagram it shows that a single RCA cable goes from the left input to the receiver Sub Out. So my second question is on the SMP250 do I get a double RCA cable to single i.e. red and white RCA male plug it in the left input (Amp) and the other side which is single and plug that into the Sub Out (Rec) or can I get a single RCA to RCA and go from LFE in (Amp) to Sub Out (Rec) Thanks
1 Answers
Hi Bally: The actual output from the SMP250 is a single Red (+) and Left (-). The speaker level connections on the left hand side of the back of the amplifier are for inputs and through outputs to the satellites (which does not apply on your setup). Regarding question #2, I am assuming you are using the In-Wall Subwoofer for your Custom Home Theater application so your first choice is to connect the LFE subwoofer output to the LFE input of the SMP250 Sub Amp. That would be with a 3.5mm to 3.5mm aux cable (which is a smaller connector than standard RCA, eg. Head pone jack on your smartphone). If your Receiver only has a right and left Standard RCA output then connect them to the corresponding right and left RCA inputs on the SMP250. I hope that helps, good luck TL/3118
Customer Service - Q&A
on February 2, 2015

Eric
from CT asked:
April 19, 2014
Does this unit come with tabs for rack mounting?
1 Answers
Hi Eric, The original model didn't have rack mounts, but the unit has gone through a redesign. We haven't received the new models yet but they may or may not have rack mounts. We just don't know yet. If I have to make a guess, I'd say they probably won't come with rack mounts, as the only amps we sell that do include rack mounts are the commercial amps (i.e. pa90, pa150, pa270). BM 2624
Customer Service - Q&A
on April 21, 2014

David Duffy
from Canada asked:
March 23, 2014
Do you know if the amp has a subsonic filter to protect vented woofer systems below tuning frequency? Not the low pass on the front, but a high pass at say 17-20 hz? Thanks. Dave
1 Answers
Hi Dave, The SMP250 does not have a subsonic filter. CS 2559
Customer Service - Q&A
on March 24, 2014

Scott
from Maryville, Tn asked:
January 1, 2014
I own an NHT W1, mono sub. It is a single enclosure that houses two 12” drivers juxtaposed with each facing outward. It only has one set of speaker inputs on the back of it. I’m replacing the A1 NHT amplifier I purchased with it. Will the SMP250 power this sub unit?
1 Answers
Hi Scott, I can't seem to pull up any specs on that subwoofer. Do you know what ohm load it has? 4ohm maybe? How much power can it handle? Do you know how many watts your NHT amplifier was outputting? Thanks. -BM 2416
Customer Service - Q&A
on March 10, 2014

Mike
from NY, NY asked:
November 15, 2013
I have had this amp for a little over a year and it is very stable and gives me exactly what i need. I enclosed both my subs between my studs with 1/2 inch MDF enclosures and my bass is terrific. My only issue with this amplifier is that there is no way to power it off remotely. Is there a way that i am able to hook up some sort of RF sensor so i can shut it off with my harmony remote?
1 Answers
Hi Mike, This amp does have the auto on/off feature, which will cause it to turn on and shut off according to the source that is running to it. For example, if you have a receiver running to the SMP250 as the music source, any time you shut off the receiver, the amp will shut off too, and the same goes for when you turn the receiver on. Thus, if your source has remote capability, you wouldn't need a remote for the amp itself, as it will follow the lead of the source. So it doesn't have IR or RF built in, but the auto sensing feature will basically replace that. Thanks! -BM 2334
Customer Service - Q&A
on November 19, 2013

Roger Eldridge
from Murfreesboro,TN asked:
July 26, 2013
I would like to power (2) Polk Audio #AM3386-A Atrium sub 10 outdoor passive subwoofers. The SMP250 subwoofer amplifier will be connected to an existing Denon 7.1 home theater receiver. Do you see any issues with this combination?
1 Answers
Hi Roger: You may have a problem going with a mono sub amplifier with the Atrium Sub woofers which features a dual voice coil connection (Right and left stereo input). I would recommend the AMP 200 instead since the output signal from you Denon 7.1 is a dedicated low pass frequency plus the Atrium Subs have built in crossovers as well. You will need to use a Y adaptor (female in to 2 Male) like our OSD; https://www.outdoorspeakerdepot.com/rca-female-to-two-rca-male.html terminating a single sub woofer cable from the Denon7.1 to create right and left input to the AMP 200. You can then hook up one of the Atrium 10 to the Speaker A output and the second Atrium10 to the Speaker B. Your Amp should drop to a 4 ohm load and create plenty of output for your two subs. TL -2106
Customer Service - Q&A
on August 21, 2013

Micah
from Utah asked:
April 19, 2013
What is the output rating for this amp with a 4 ohm load? I assume the 180/250 is at 8 ohms. I have a 15" sub who's plate amp is dying on that is rated at 350 watts (AV123 MFW-15 amp issue). I just hope this amp will drive it nominally.
1 Answers
Hi Micah, The SMP250 subwoofer amplifier is 300 watts into 4 ohms. The SMP250 will your 15" subwoofer. CL/MA 1811
Customer Service - Q&A
on April 23, 2013

steve
from toronto asked:
January 29, 2013
I have 2 10" cerwin vega subwoofers in a box that I used in my car years ago. Can I use this amp and hook those subwoofers up to use for an inhome subwoofer setup? If so what would I have to do? Thanks, Steve
1 Answers
Hi Steve, First you need to determine if these subwoofers are 8, 4 or even 2-ohm impedance. Check to see if they are labeled on the drivers themselves. If you have a model number you can go to the Cerwin Vega web site to look them up. If they are 8 ohm,you can wire them in parallel. If they are 4-ohm you need to go in series (same with 2 ohm.) For parallel, you wire the two positives of the drivers together and terminate to positive output of SMP250. Connect the negatives to negative output of the SMP250. The amplifier will see a 4-ohm load and should have plenty of output and run a little hot. If they are 4 ohm (most likely) or 2 ohm, you will need to connect in series which means connecting the positive output of the SMP250 to the positive input of driver #1 then connect a wire from the negative of the speaker #1 and connect to the positive of speaker #2. Final connection would be between the Negative of Speaker #2 to the Negative output from the SMP250 amplifier. If you can not determine the true impedance of the drivers, go with in series to be on the safe side. TL/MA - 1592
Customer Service - Q&A
on January 30, 2013

nimish
from chicago asked:
December 23, 2012
I have a IWS-88 connected to the SMP-250. I have the SMP-250 connected to a Pioneer Elite SC-65 receiver. I'm getting very faint sound coming from the sub (and only at max volume setting). I have speaker wires from IWS-88 sub connected to SMP-250 "subwoofer speaker output" port. I have one end of the mono cable connected to the SMP-250 "LFE IN" port and other end connected to SC-65 "subwoofer out" port. Do I need to set the phase correctly? How about the Low Pass Filter? Can you help?
1 Answers
Hi Nimish, Regarding the SMP250, here are a couple of things to consider. You have the Pioneer Elite Audio Video Receiver connected to the LFE input of the SMP250. Make sure your LFE setting on the Pioneer is set to 0 db (the highest setting). Then on the front of the SMP250 set the controls as follows: Polarity to zero all way to the left, the crossover setting should be at 12:00 o'clock (the LFE overrides the high-cut filter) and the Volume Control at 12:00 as well. On the back panel of the SMP250 there is a level (gain) control right next to the LFE input. You want to turn this adjustment at least half way or more depending how much output you want. If you have not touched this, you will notice a huge difference as you turn it clockwise. Once you have set it to acceptable levels, the volume level will be directly affected by the volume levels of the Pioneer. It will increase or decrease along with the other 5, 7 or 9 channels when you adjust the master volume levels. We hope this helps! TL/MA - 1487
Customer Service - Q&A
on December 24, 2012

Product Reviews

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100% Recommend this product (3 of 3 responses)
By Bruce
Florence, KY
August 13, 2016
Does the job
I have a pair of Cambridge Soundworks sub woofers. Recently purchased a new 5.1 receiver. Could drop them and purchase a powered sub woofer, but hated to give up a good pair of woofers, so I looked around for a amp that would power them off the sub woofer jack on the receiver. Since low frequency singles are less directional, I wasn't worried about a mono output. Wired the speakers in series and the bass and perfect.
By Craig
Kinnelon, NJ
May 21, 2013
Great amplifier!
Works great, good solid bass! Only thing I would like is for it to turn off after 30 seconds of inactivity. Would buy it again.
ProsNice looking, solid construction
ConsShould have auto power down sensing
By snwman47
Boynton Beach, FL
December 15, 2012
Great Amp !!!!
I have 2 of these Amps with 2 - 18" subs ( Behringer VP1800'S) on each Amp , Their performance is nothing short of fantastic
ProsEasy to Mount, Good Power Output, Easy To Set Up, Great Sound Quality, Attractive Design
Best UsesHome