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Home / Product Category / SPEAKERS / Subwoofers / In Wall Subwoofers / In Wall Subwoofer Dual 8" Injected Woofers Back Bridge Plate IWS88 (New Improved Design)

In Wall Subwoofer Dual 8" Injected Woofers Back Bridge Plate IWS88 (New Improved Design)

Product code: OSD-IWS-88

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OSD Price: $69.95
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Features & Specifications

A subwoofer is designed to reproduce the lowest of audible frequencies and will give you that spine-tingling rumble effect that takes you out of reality and into the plot. With dual 8" Injected polypropylene woofers, bigger magnets and 350 Watts of power handling, the IWS-88 in-wall subwoofer performs excellently for home theater surround sound applications as well as for listening to music. Like all OSD Audio speakers, the IWS-88 includes a dog-ear bracket system that mounts securely to the sheet-rock after the cut-out hole has been made and the speaker has been dropped into the hole. The grille is paintable to match your room decor and we even include a cutout template that doubles as a paint shield. You'll experience thunderous, room-filling bass without filling up floor space.


Amplifier Suggestions
Because this is a passive speaker, it will require a subwoofer amplifier to power it. An ideal match to this subwoofer is our OSD SMP250 dedicated subwoofer amplifier that features 150 watts (mono) and front panel controls, Phase switch, Frequency Control Knob (35 Hz to 180 Hz) and Volume control.

*Note: Requires Additional Subwoofer Amplifier

Specifications

QUESTIONS & ANSWERS

18 Questions & 19 Answers
Nick
from Indiana asked:
October 25, 2017
Would this be safe to mount in the ceiling or is there a better product for that?
1 Answers
Hi Nick: Yes these will work in a ceiling as will all of our in-wall subs but it is good idea to create some sort of enclosure to reinforce the speaker so it is not playing more bass above the ceiling. Stuffing the enclosure with fiber fill (like for Pillows) will help you tune your speaker. The fiber fill absorbs the low frequencies making the woofer think it is in a larger enclosure. Checkout our SL800 on-wall sub which features a quasi sealed enclosure with an 8 inch active woofer and 10" passive Woofer. It s too deep to fit into a wall but would fit between two ceiling joists and already features a tuned enclosure. Just a thought. Good luck TL/4609
Customer Service - Q&A
on October 27, 2017

Matt
from Hoffman Estates, Illinois asked:
October 14, 2017
I want to put 2 of these in a 2 story 20ft by 20ft family room. I know that acoustics are not going to be that great in a 2 story room but wanted to know if this is overkill. Both subwoofers will be placed on the same wall - pic attached. Any help/advice greatly appreciated! Thanks!
1 Answers
Hi Matt: Two woofers are always better than one, there is a real reason AV receivers went to dual Subwoofer outputs as in 5.2 or 7.2. Even though Sub woofers are omni directional in nature versus the highly directional characteristics of the Tweeter with the High Frequencies. Due to wider Sign waves of the lower Frequencies when you use just a single sub woofer you will experience dead spots in your room. Adding a second sub woofer greatly negates this effect. So I would not call it overkill. Will you be able to build an enclosure or at least re enforce the area around the sub. It is also a good idea to use some fiber fill behind the sub so it thinks it is in a bigger enclosure. Our SMP250 Sub amplifier would be ideal for the job as well. Good luck TL/4592
Customer Service - Q&A
on October 17, 2017

John
from Houston, TX asked:
June 20, 2017
Hello, I just purchased the IwS88 with the SMP250 and was planning on installing it into the wall where my air ducts run through. It is a tight space but this it is the main duck space that runs from the second floor to the fourth floor attic. along with cat 5, coax, electrical, etc. Because it is sealed should it be set it up as an infinite baffle? The builder's contractor placed rca and speaker cable on the second floor in the duct space to the main speaker demarcation point. I am thinking they did this to be able to place a in-wall sub woofer. Just want to see if I will be ok, or should I go with the Sl800 instead? I have included pictures of the environment and I am glad I didn't start cutting drywall just yet. lol. Love your products OSD. Thanks for the advice.
1 Answers
Hi John: The SL800 is much better for your application. It is always more advantageous to have a sub woofer that can be placed around the room to find the best location where you will hear the most low frequencies while sitting at your optimum viewing/listening position. Either speaker needs a True Subwoofer amplifier like our SMP250. It is true that the Sub woofer is Omni-directional but due to the size of the Sign wave produced by the low frequencies there tends to be dead spots around the room when using only a single Sub. When trying to determine the best location you are limited with an In wall sub that does not feature a sealed enclosure. You can not experiment on different locations like you can with the SL800. In fact we recommend during setup that you place the SL800 on the main chair/couch where you will be sitting. Now while playing your sub you will need to walk around the room checking out the three locations your wife (if you are married) will allow for the sub to be placed. That will be the optimum location for the SL800. You also have the option of adding a second SL800 powering both with the single SMP250. Two subs helps eliminate those dead spots as well. Ironically the SL800 was designed as an in-Wall Sub but they could not get the depth low enough without sacrificing the excellent sound quality. Good Luck TL/4434 PS: Did I see clear jacketed speaker wire in your image wrapped around the duct? Does the outer jacket say CL2 or CL3?
Customer Service - Q&A
on June 25, 2017

mike padilla
from c asked:
October 17, 2013
what is the optomal location for this speaker, front or rear? and what is the ideal height? can i install at 7' high
1 Answers
Hi Mike: That is a tough question. Probably the best location is the one that is most accessible for your wiring from your Sub-woofer Amplifier. And you also need to take into consideration the idea of mounting the speaker in the wall with an internal enclosure to make sure all the sound is focused into the room and not bleeding out the back. You need to pick an area where you can build the enclosure. Also if you budget allows it think about adding a second IWS-88 to be mounted opposite of the first , so front and back as an example. There is a reason the Receiver companies are now promoting 7.2 systems which call for two Sub-woofers. The problem with just one sub is that with the large sign waves from the sub there is a tendency for dead spots in the smaller room. So adding a second Sub-woofer is recommended to fill in the gaps. The advantage of a stand alone external Sub-woofer is you can experiment with the location moving it around the room to find the optimum spot. I hope that helps TS-2281
Customer Service - Q&A
on October 18, 2013

Kevin
from GA asked:
August 3, 2017
Will this mount in a 2" x 4" framed wall for depth (assuming lumber is 3 1/2" deep + faced with 1/2" gypsum board)?
1 Answers
Hi Kevin: The depth of the IWS-88 is 3 9/16 just a shade over 3 1/2. You have 3.5" stud with the additional 1/2 inch of the Gypsum board so it will fit.. TL/4504
Customer Service - Q&A
on August 4, 2017

Brian Holland
from Tyler, TX asked:
January 19, 2017
Does this speaker come with the paintable grille, I do not see it in any of the product pictures
1 Answers
Hi Brian: The Speaker includes a paintable grill shipped with it. TL/4185
Customer Service - Q&A
on January 24, 2017

James
from USA asked:
June 14, 2016
Can you recommend a non-ported enclosure volume for the IWS-88 subwoofer? I have to install a pair in a large open ceiling void, and I'm guessing it will work much better if we box out a part of that void before installing the sub. Hence the need to know what volume will give best overall perfomance. The room it has to support is large (over 500 sqft) and it will be supporting 3 pairs of 8" in-ceiling speakers. Not ideal, and I know that two would be better than one, but it was a battle just to get this one in the mix
1 Answers
If you want to build a back box, make sure it is at least the same size of the width and length of the speaker, but at least 4 to 7" deep, also please add some fiber materials inside.
Customer Service - Q&A
on June 16, 2016

Maximiliano
from Brazil asked:
November 22, 2014
I am planning to make a 7.1 system considering: MKIW550LCR for the central Chanel, OSD-MKW-850 for the LR front Chanel and I have a doubt whichr rear surround I need to use MK670 or MK690TT? Another doubt is which subwoofer I need to use IWS-88 or IWS-10? please help me to define my system. Thank you.
2 Answers
Hello again Max, You can use either speaker for the back, but if the back speakers are not somewhat above the sitting area, you could use the MK670 for the angle. For the sub, I personally recommend a powered floor standing sub such as the PS10 or PS12, because the in-wall subs need a subwoofer amplifier.
Customer Service - Q&A
on November 26, 2014
Hello again Max, You can use either speaker for the back, but if the back speakers are not somewhat above the sitting area, you could use the MK670 for the angle. For the sub, I personally recommend a powered floor standing sub such as the PS10 or PS12, because the in-wall subs need a subwoofer amplifier.
Customer Service - Q&A
on November 26, 2014

Jon
from Hamilton asked:
April 5, 2014
I have purchased 5 in wall OSD speakers so far. Very Happy. I want to add this to my system -by plugging this passive subwoofer into one of the dedicated sub outs - of my 7.2 receiver. What cable to I need? The back of my Sony receiver has an RCA available for this sub. Running an RCA male to exposed speaker wire seems like a nightmare. Please advise -and I will buy. Thanks
1 Answers
Hi Jon, You will need a Subwoofer Amplifier to power the IWS-88. The Sub Amp will have a built in crossover which will separate the high and low frequencies and will only send the low frequencies to the amplifier. You will use a subwoofer cable to run from the receiver to the Sub amp. I suggest looking at the SMP250. CS 2599
Customer Service - Q&A
on April 7, 2014

Tim
from Chicago,Il asked:
April 2, 2014
Tim from Chicago again. ( See question from last week) I asked the question about using IWS-88 and powering it with the Yamaha RX-V 575 7.2. 1. Yamaha's connection for the subwoofer calls for a audio pin cable. How do I convert the speaker wire I connected at IWS-88 and pulled to the RX-V575 to a audio pin cable? 2. On page 4 of the Yamaha's directions, they say to use a subwoofer with a built-in amplifier. Per the question I asked last week, the answer was the RX-V575 has enough power for the IWS-88. HELP!!!!!!
1 Answers
Hi Tim, You would need a subwoofer amplifier in order to power the in-wall subs. Our SMP60 can power the IWS8, and our SMP250 will power the IWS-88 and IWS10. Unfortunately we are out-of-stock on both amps for another month or so, but you can't really run these subs with a stereo amp/receiver such as your Yamaha. The reason being that these subs don't have crossovers to filter out the highs, so you need an amp that does that for them. -BM 2591
Customer Service - Q&A
on April 3, 2014

Tim
from chicago.Il. asked:
March 22, 2014
Can I power this subwhoofer duel 8" IWS-88 with a receiver such as the Yamaha 7.2 RX V575, I would like to avoid spending 299 on the SMP250 and having more equipment added my bookshelf. If not, is there another 7.2 receiver that would work at a reasonable price please let me know. I have in wall OSD speakers in place and would like to add this in wall subwhoofer to complete my system.
1 Answers
Hi Tim, As long as you are using a 5.1 or 7.2 Receiver, they have enough power for the subwoofer. A receiver would have a Subwoofer channel with a built in crossover to separate the highs and lows frequencies, A 2 channel Amplifier would not have the crossover to do this. CS 2556
Customer Service - Q&A
on March 24, 2014

Gary
from St. Catharines ON. asked:
March 14, 2014
Hello, I have 7.1 Pioneer amp in my kitchen . I run it in stereo on two in ceiling speakers. Can I run these subs powered from my available empty channels on the receiver directly to each of these speakers ?I have already prewired in wall with 2 runs of speaker cable to same location. Thank You
1 Answers
Hi Gary, I would suggest getting a Sub amp to power the IWS88s as a 7.1 receiver would not have enough power for both subs. Check out the SMP250. That would be enough for both of those. CS 2537
Customer Service - Q&A
on March 17, 2014

ERIC
from BALTIMORE asked:
April 30, 2013
DO YOU NEED A POWERED SUB TO DRIVE THIS SUB OR CAN YOU USE IT PASSIVE. WHAT IS THE CONNECTION? RCA? ANY SPEC SHEETS AVAILABLE
1 Answers
Hi Eric, This in-wall subwoofer is passive and requires a subwoofer amplifier, such as our SMP250, to power it. The connection from the subwoofer to the amp is speaker cable. CL/MA 1845
Customer Service - Q&A
on April 30, 2013

gary
from new york asked:
February 22, 2013
I was thinking about purchasing this speaker. It says cinema meaning home theater. Is it also good for music?
1 Answers
Hi Gary, The IWS88 in-wall subwoofer is a great balance between performance and price. This subwoofer performs excellently for home theater surround sound applications as well as for listening to music. CL/MA 1647
Customer Service - Q&A
on February 25, 2013

Nimish
from chicago, il asked:
August 6, 2012
Do you have a spec sheet on this speaker?
1 Answers
Hi Nim: We will need to create a spec sheet for this speaker which will post on the product page. Please stand by... TL
Customer Service - Q&A
on August 8, 2012

nim
from chicago, il asked:
June 29, 2012
i am building a home and looking for a pre-construction bracket for this item. I don't see one so how is is mounted?
1 Answers
Hi Nim: As you can see from the images on the product page the IWS-88 features an eight leg Dog Ear mounting system. It mounts securely to the sheet-rock after the cut-out hole has been made and the speaker has been dropped into the hole. We do recommend you create an enclosure behind the speaker in the stud bay. I am assuming since you are inquiring about a new construction bracket you will have access to the wall before the sheet-rock has gone up. We recommend adding a (2) 2x4 piece of stud material roughly 24 inches apart one above and one below where the speaker will be centered. Then you would add a 1/4 board to run between the two studs running vertically and the two pieces you have added above and below. So 24 " tall and 14 to 15 inches based upon the actual measurement between the two vertical studs. Then add a little silicon applied along the seams of the 1/4" backboard and the studs before you install the Sheet-rock and cutout your hole. There is a cutout template that doubles as a paint shield that you use to mark your hole. Lastly you will want to stuff the cavity with some fiber fill like you find at a bedding or hardware store. TL
Customer Service - Q&A
on July 1, 2012

nim
from Chicago, IL asked:
June 26, 2012
does this include a paintable grill cover?
1 Answers
Hi Mim: Yes all of our speakers have paint able Grills and Frames. And the paint shield is included with this speaker as well. TL
Customer Service - Q&A
on June 27, 2012

Joe
from NW Indiana asked:
November 30, 2011
What type of amp is recommended for this subwoofer???
1 Answers
Hi Joe: The best Amp for the job is our OSD SMP250 (MI-3) dedicated Subwoofer Amplifier. It features 150 watts (Mono). It also features front panel controls, Phase switch, Frequency Control Knob (35 Hz to 180 Hz) and Volume control. Plus Three turn-on options; Music sensing, Manually switched or 12 volt trigger TL
Customer Service - Q&A
on November 30, 2011

Product Reviews

4.5
2 Reviews
5
50% (1)
4
50% (1)
3
0% (0)
2
0% (0)
1
0% (0)
100% Recommend this product (2 of 2 responses)
By silverjohn
Millsboro, Delaware
October 8, 2012
This product is better than I expected.
The deep base sound is exceptional
ProsGood Power Output, Great Sound Quality, Easy to Mount, Easy To Set Up, Attractive Design
Best UsesHome, Home Theater, Larger Rooms, Basic Systems, Multiple Rooms / Whole House
By Hank
Seattle, WA
July 29, 2011
Tons of loud, house shaking, thundering!
Fits perfectly into the wall and make wife very happy. Tons of loud, house shaking, thundering bass! You need subwoofer amplifier to power it. This sub makes listening to music at any volume more full and enjoyable.
ProsEasy to Mount, Good Power Output, Great Sound Quality, Easy To Setup
Best UsesHome Theater