Placing subwoofer inside cabinet to hide. Bad idea? - AVS Forum
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post #1 of 24 Old 03-10-2011, 07:43 AM - Thread Starter
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I have an SVS PB-12 (front ported) subwoofer I'm trying to work into our new house. My wife already hates it, but in the old house I had a nice corner it could stay in and you could barely notice it. Our new house is lacking of corners and good places to place the sub discretely. After poking around the internet and considering building my own end table around the sub, I came across a nice looking dog crate. The sub will fit nicely into one of the sizes and I'll get some speaker cloth to put in the front where the hole is. Is this a workable idea? Is there anything I should consider that I may not have thought of being a speaker novice? Should I put something on the sides and top to make it snug or leave the air around it? Any thoughts or ideas would be greatly appreciated!

Thanks!

The crate:
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post #2 of 24 Old 03-10-2011, 07:59 AM
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Quote:
Originally Posted by cooterbrown000 View Post

I have an SVS PB-12 (front ported) subwoofer I'm trying to work into our new house. My wife already hates it, but in the old house I had a nice corner it could stay in and you could barely notice it. Our new house is lacking of corners and good places to place the sub discretely. After poking around the internet and considering building my own end table around the sub, I came across a nice looking dog crate. The sub will fit nicely into one of the sizes and I'll get some speaker cloth to put in the front where the hole is. Is this a workable idea? Is there anything I should consider that I may not have thought of being a speaker novice? Should I put something on the sides and top to make it snug or leave the air around it? Any thoughts or ideas would be greatly appreciated!

Thanks!

The crate:

This is most certainly a bad idea. The vibrations will be unnerving and will interfere with your viewing pleasure. Your wife will really hate this arrangement. My suggestion would be to place the subwoofer in the most discrete location possible, rent a chick-flick with some low frequency effects, and demonstrate to her how essential the subwoofer is to the home theater experience. Good luck.
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post #3 of 24 Old 03-10-2011, 08:50 AM
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I also agree. Placing a subwoofer inside of a cabinet or inside of any other structure is always a bad idea. People always keep trying to do it to try and increase the WAF factor. A subs enclosure was already engineered and built to a specific size with specific internal measurements to sound good. When you try and put a sub inside another structure you throw a lot of that engineering away.
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post #4 of 24 Old 03-10-2011, 09:18 AM - Thread Starter
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Where would the vibrations come from and is there any way that I could prevent any vibration?

Is there any way to make something like this feasible? Could building my own sides and top around the sub while putting padding between the box and the sides/top work? I would love to somehow make the sub into something like an end table, but simply throwing a cloth of some sort and sticking a lamp on it won't be enough.

Sorry for all the questions, I'm just trying to figure out a good compromise for my wife.

Made a rough sketch in Paint to show the room I'm working with. I might try to sneak it behind the couch.
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post #5 of 24 Old 03-10-2011, 10:44 AM
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Is a new wife economically out of your budget at the moment?
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post #6 of 24 Old 03-10-2011, 11:21 AM
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Tell the wife to let you sell the PB12(nsd I assume?) and buy an PB13Ultra in a nice wood finish. That way you get awesome bass and a pretty end table too
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post #7 of 24 Old 03-10-2011, 01:05 PM - Thread Starter
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Quote:
Originally Posted by fitbrit View Post
Is a new wife economically out of your budget at the moment?
with a baby due on the 28th...yeah.

edit: in my previous post, i meant sneak it behind the recliner...not couch
and yes, PB-12 NSD
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post #8 of 24 Old 03-10-2011, 01:11 PM
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Congrats on the baby coming! First one? The good news is that you will hardly have time to watch anything for a few months, so you have lots of time to plan! I mean plot.
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post #9 of 24 Old 03-10-2011, 01:49 PM
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As long as the cabinet/piece of furniture is made very sturdy, it not greatly oversized, and it can easily breath, there is no reason why you can't go this route. I have often had custom tables built for this purpose with no bottom in them. The sub sits on the floor, and the table slips over it.

The same rules apply though with regards to LF small room acoustics. Given your room proportions, will the sub location and your primary seating area be in acoustic harmony?
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post #10 of 24 Old 03-10-2011, 02:24 PM
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Im a married guy myself. Im lucky that I get away with the stuff that I do as far as audio equipment goes as well as some of my other hobbies. Being married can be difficult at times as far as agreeing on decorating aspects of the house. I don't say a thing about what my wife wants to do in her kitchen or the bathrooms. Lucky we have 2 bathrooms so she didn't girly up the one that I use to badly. She did our bedroom how she wanted, and it is nice. She let me have the second bedroom/office for myself. It still has to double as a guest bedroom. I also have free reign as to what goes on in the garage. The living room is a dual purpose room. It has the theater in it and it has a lot of gear in it. She doesn't complain to bad about it. If it where up to her it would still have A/V gear in it but maybe not as much as it has. For example, it has four 15'' subs in it as well as some mains that are as large as some medium sized stand up refrigerators. I love my wife for this. She does like music and movies and realizes that to get the type of sound in the room that we have it cant come out of speakers or subs the size of pop cans. You sort of have to give and take. Im sure you know about this. For crying out loud you only want one sub!!! I don't think that's to much to ask. With all due respect to you and your wife. Take a walk into the kitchen and go to that shelf where your wife puts her cooking goods. Look for a glass jar. This jar will contain your NADS. Take them out of the jar and place them back in your pants where they belong.
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post #11 of 24 Old 03-10-2011, 02:59 PM
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cooterbrown000 said:

Quote:
I would love to somehow make the sub into something like an end table, but simply throwing a cloth of some sort and sticking a lamp on it won't be enough.
You can. Do what I plan on doing to my sub when I get it and that's to veneer it. Figure out what your furniture decor is and then get a sheet, pick out your stain, find some clamps, a veneer saw and edge band iron, and pick out the adhesive that's best suited to your weather. Practice a bit if it's your first time. If you can't do it yourself, find somebody in your metro that has a good rep that can do it for you. What you'll get is a beautiful sub that can be used as an end table. If it's a down-firing one, it's a slam dunk as far as the actual veneering it is concerned.

Secret Squirrel said:

Quote:
She let me have the second bedroom/office for myself. It still has to double as a guest bedroom. I also have free reign as to what goes on in the garage. The living room is a dual purpose room.
I think we married the same woman.

"I am NOT suffering from insanity... I happen to be enjoying myself!"

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post #12 of 24 Old 03-10-2011, 03:04 PM
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If you have room, put insulating Styrofoam around the sub. Leave the back open for air flow over the amp. Push the front of the sub flush with the front of the cabinet so it connects with the room properly. Otherwise it will boom in the cabinet.

Randy
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post #13 of 24 Old 03-10-2011, 06:20 PM
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You mean like this? It is fine. A lot of you guys seem to work real hard at taking the "Home" out of Home Theater. Unless you sink it way back into a cabinet the sound will not change. Use felt or rubber bumpers under the sub and where the door makes contact. No rattles or vibes at all for me and the sub goes down pretty deep (well used to). As soon as the Rythmik high power drivers come back in stock I am going to DIY them into the cabinet on both sides so I can utilize a full 4cf for the sub enclosures. I got the 82" TV due to my consideration of the WAF. Still sounds good and we are both happy.

Here is a link to my post of the entire wall unit.
http://www.avsforum.com/avs-vb/showp...postcount=1221
LL
LL
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post #14 of 24 Old 03-10-2011, 06:30 PM
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Very nice RD. As an amateur woodworker, I can appreciate what you did there.

"I am NOT suffering from insanity... I happen to be enjoying myself!"

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post #15 of 24 Old 03-11-2011, 09:00 AM - Thread Starter
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Dang RD, that looks really nice.

If I were to go with the end table, I would probably add glue between each piece so there is a nice tight seal and there is no vibrations. What glue should I use? Should I put some sort of foam or insulation between the sides of the sub and the sides of the end table? I'll have about an inch and a quarter on either side, an inch and a half on top (I wouldn't insulate on the top or front/back), and an inch on the front/back. Should I put anything underneath it?

Thanks for all the replies, and I'm taking them all into consideration, even Secret Squirrel's, lol (my wife and I have a great relationship and we both typically get what we want).
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post #16 of 24 Old 03-12-2011, 12:03 AM
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Thanks! IMO I would avoid stuffing anything around the sub. Even though the stuffing is soft it may provide some sort of coupling between the sub enclosure and what you are hiding it in. I used thick felt pads under the sub that I found at the home center. Provides some isolation and makes it easier to slide the subwoofer in and out of the cabinet. I used a thermostatically controlled ducted fan with an inlet and outlet in the back of my cabinet due to the tight constraints. If your design has some breathing room I would not worry about it (like the doggy crate). As far as adhesive I like to use a poly construction adhesive on a lot of my projects. Cannot recall the name right now. I can dig up a tube and get the name later for you later if you would like.
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post #17 of 24 Old 03-12-2011, 02:37 AM
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I have to agree with much of the above. While you can put a sub in an cabinet, it will be difficult to make it work right. You have to put something between the sub the feet of the sub and the cabinet to prevent rattling and vibration. You have to make sure there is airflow around the amplifier. To do that around a PB12 would make that a huge cabinet. I recommend just selling the sub and buying one she could live with. Elemental Designs can do different kinds of tasteful wood finishes. Rythmik has a couple wood finishes too, not to mention piano gloss finishes. The Hsu has a nice Rosenut option on some of their subs, a Rosenut VTF3 might make a acceptable substitute for an endtable. Funkywaves in Canada has some incredible wood veneers, but they will be a little pricier. They can customize your sub to a fair degree though, so if anyone can make a powerful sub with a high WAF, it's Funkywaves.
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post #18 of 24 Old 11-22-2012, 05:31 PM
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How are you securing the door to your entertainment center, I plan on borrowing this idea from you.

Thanks in advance.

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post #19 of 24 Old 11-22-2012, 07:26 PM
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Getting all the rattles out would be a nightmare. You're better off to build your own sub from scratch as a piece of furniture, like this:
T18.jpg

Bill Fitzmaurice Loudspeaker Design

The Laws of Physics aren't swayed by opinion.
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post #20 of 24 Old 11-24-2012, 12:10 AM
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Quote:
Originally Posted by Hillshire94 View Post

How are you securing the door to your entertainment center, I plan on borrowing this idea from you.
Thanks in advance.

Is this post directed at me? If so I will try to get some pictures for you. The doors are held in place by metal tabs and rubber bumpers, friction fit. In the middle of changing my work truck motor this weekend so it may be next week.
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post #21 of 24 Old 11-27-2012, 04:18 PM
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OK just when you get time, thanks in advance

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post #22 of 24 Old 12-09-2012, 10:13 PM
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Sorry this took a while.




No disrespect to Mr. Fitzmaurice as I am sure he has built and designed many more speaker systems than I. But as you can see I now have an 18" LMS 5400 (two of them) with 4500 watts apiece powering the drivers. No rattles in the wall unit, the rest of the house is a different story but I have got most those rattles under control as well. Hope this helps
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post #23 of 24 Old 12-15-2012, 07:35 AM
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Looks great I will use this as a reference, Thanks

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post #24 of 24 Old 12-26-2012, 08:54 PM
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Hello again if you would, could you please send me a walk through of how you built your cabinet door for sub-woofer, I am having trouble with it, if you could send me parts list and tools used and how you took your measurements , I would really appreciate it. Having a little trouble..Thanks in advance

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