265 LS in-wall backer box size?

69glamboy

Hello everyone, is there a rule of thumb for building backer boxes for these babies? I have 24" center stud walls/ 3 1/2" deep. I have access to building any enclosure for them. At the moment I have inserted them into these walls with just roxul insulation and they are not sounding that robust. Any help would be much appreciated!

[Deleted User]

The 265 LS sound their best when backed with Polk's Performance Enclosures, these have been specifically designed for the smoothest bass quality from the speakers.
If you are not using this then make the area behind the speakers as air tight as possible with an internal volume of 1.2 cubic feet.

69glamboy

Wow! Exact answer I was looking for. Thanks Kenneth! I have hung out at AVS forum for way too long. No one would even touch upon my question. I guess they wanted my wallet open for the secret sauce answer. Thanks again!

[Deleted User]

Glad to be of help.

69glamboy

Kenneth... Can't seem to find the enclosures on the Polk site. Would you happen to know if they are discontinued? Have a link? Thanks again

txcoastal1

I have found this, I to am looking for a more complete and up to date list of compatible rough in kits for installation

http://www.crutchfield.com/S-0JhEWGAZkra/shopsearch/polk_wall_brackets.html?awcp=1t1&awcr=28879745603&awdv=c&awkw=polk audio wall brackets&awmt=b&awnw=g

[Deleted User]

I'm not sure if Polk sells them directly or not, give a call to Polk CS at 1-800-377-7655 and they can help with that. Crutchfield is always a good place o find Polk gear.

69glamboy

Thanks txcoastal/ Kenneth, I will make some calls.

txcoastal1

Please post what they say about the 265's

Thanks
___Ron

69glamboy

Was on hold for a painfully long time. Gave up. Anyway guys I proceeded to "mimic" my own 1.2 cu ft boxes. As shown here, this is what the Polk Box guts look like. In my next post I will show you my hillbilly approach. Wait for it.......

69glamboy

Here is one "custom" backer box I had to cut in. Put in some mdf pieces according to the Polk factory one. What is missing from my photo is a small piece of Roxul safe and sound insulation I plopped in at the bottom left cavity. I then caulked some acoustic sealent all on the inside rim areas. Also caulked the faced 2x4 portions before I put my osb board back on. Trying to get things air tight. Now,the sound is like night and day. Before my sound was getting absorbed straight into the insulated wall. Had a terrible tinny-treble filled sound. Now...it is full and robust! ( I swung my side speaker cables on my receiver, on to my mains) I would definitely suggest to anyone to at least attempt to cut in boxes for inwalls, if you cant install in an unfinished wall. I hope this helps the forum members. Talk soon.

69glamboy

I lost everyone! What happened? ( bump)

JEmotorsport

69glamboy wrote: »

Here is one "custom" backer box I had to cut in. Put in some mdf pieces according to the Polk factory one. What is missing from my photo is a small piece of Roxul safe and sound insulation I plopped in at the bottom left cavity. I then caulked some acoustic sealent all on the inside rim areas. Also caulked the faced 2x4 portions before I put my osb board back on. Trying to get things air tight. Now,the sound is like night and day. Before my sound was getting absorbed straight into the insulated wall. Had a terrible tinny-treble filled sound. Now...it is full and robust! ( I swung my side speaker cables on my receiver, on to my mains) I would definitely suggest to anyone to at least attempt to cut in boxes for inwalls, if you cant install in an unfinished wall. I hope this helps the forum members. Talk soon.

Looks nice. Do you have the dimentions on your box?

JEmotorsport

Thinking about H x W x D ;-)

txcoastal1

14"W x 55-5/8"H x 3-9/16"D

http://www.crutchfield.com/p_107ENLC65I/Polk-Audio-Performance-Enclosure.html

dimensions are in the specs