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Polk Audio PB SC85

Pre-construction brackets for select Polk in-wall speakers

14 Reviews

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Item # 107PBSC85

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Our take on the Polk Audio PB SC85

These pre-construction brackets are designed to hold Polk's RC85i or MC85 in-wall speakers. Use the included wings to attach the bracket to studs before the drywall goes up. Polk provides the brackets and mounting tabs you'll need to do a quick and easy installation.

Product Highlights:

  • compatible with Polk RC85i and MC85 in-wall speakers
  • includes two adjustable brackets for easy installation
  • hardware included
  • requires drywall cutout approximately 8-15/16"W x 12-11/16"H
  • 10-3/8"W x 14-1/4"H x 1-3/16"D
  • warranty: limited lifetime
  • Our 60-day money-back guarantee

What's in the Box:

  • 2 Plastic speaker frames
  • 4 Plastic wings
  • Eight 1 1/4" Sheetrock screws

Polk Audio PB SC85 Reviews

Average Customer Review(s):

(14 Reviews)

Polk Audio PB SC85

Anonymous from Anthem, AZ on 6/29/2018

Crutchfield Customer Review (What's this?)

needs to be a little stronger material. easy to mount



Polk Audio PB SC85

Anonymous from Idaho Falls, ID on 3/25/2018

Crutchfield Customer Review (What's this?)

Knowing what these are makes the difference. They are templates for sheetrock installers to make cutouts. They serve little to no strength. Based on this they work great. Install easy and versatile.




Rob from Powder Springs, GA on 12/9/2017

Crutchfield Customer Review (What's this?)

Very very flimsy..... not sure it will withstand the drywall install



Polk Audio PB SC85

Anonymous from Saint Paul, MN on 11/23/2017

Crutchfield Customer Review (What's this?)

Incredibly flimsy, the stabilizing arms cracked when fixed to the wall



Crutchfield response on 11/27/2017 We're sorry you're having issues with your brackets. Whenever you encounter a problem with anything you purchase from Crutchfield, especially a situation like this, please contact our Customer Support team at 1-800-955-9091. Purchases from Crutchfield can be returned or exchanged within 60 days of the purchase.

Polk Audio PB SC85

Ron from Duncan, SC on 8/29/2017

Crutchfield Customer Review (What's this?)

Not as good as the round brackets by Polk. The round ones didn't crack...these did. The straps don't snap in as nice on these.

Pros: Just OK

Cons: Cracks easy

Makes it easy

bdh from Minneapolis, MN on 4/2/2016

Crutchfield Customer Review (What's this?)

Easy to use




balaman from sanford, FL on 3/23/2016

Crutchfield Customer Review (What's this?)

good fit. Thought that given the application Material would be more durable. Made of brittle plastic ! Broke a piece off the extender for post support.



Bracket Review

Purchaser from New Jersey on 9/19/2014

Crutchfield Customer Review (What's this?)

Forms are plastic and relatively easy to install. The heads from the screw provided broke off way to easily when screwing into studs. These really are only useful as in my case where you want your sheetrock installers to do the cutouts so everything lines up well, otherwise they are not needed.

Pros: Easy Installation, tabs break easily and allow for easy measurements.

Cons: Plastic is flimsy. Screw heads broke with little force. Price is too expensive.

Easy Installation

Darren from Raleigh, NC on 8/1/2014

Crutchfield Customer Review (What's this?)

The bracket is as described and provides a better mounting then just placing in a sheet rock cut out.

Pros: Easy installation and a firmer hold for the in-wall speaker.

Cons: None


GabeP from Horseshoe Bay, TX on 8/25/2013

Crutchfield Customer Review (What's this?)

Straight-forward, simple installation in a new-build home. Only complaint is that the drywall screws provided with the brackets are a bit substandard. All but two of them broke off at the head when driving them into the studs. Not expensive to replace them, but it did result in an inconvenient trip to the hardware store. House is not complete yet, so not sure how much of a difference these will make vs installing the RC85i speakers without brackets. Will be nice to have the holes in the drywall pre-located though.

Pros: Easy installation

Cons: Cheap screws.

are these really needed?

DH from sioux falls on 5/25/2013

Crutchfield Customer Review (What's this?)

bought these to go with speakers. they seem cheap and expensive considering how flimsy they are. hopefully they make installing easier. basement not done, so speakers aren't in yet, only the brackets have been installed.

Pros: should(?) make for an easier install

Cons: The price seems like plenty for some flimsy plastic brackets and a few screws.

good Bracket

ttomeboy2152 from Rockford, IL on 5/5/2013

Crutchfield Customer Review (What's this?)

Work well for their intended use

Pros: Ease of installation

Cons: A little on the pricy side

Polk Audio PB SC85

Jim from College Point,Fl on 3/22/2011

Crutchfield Customer Review (What's this?)

Waaaay too expensive for 4 pieces of fragile plastic. But they did make it easier to place in new stud wall.



low value

gardner from des moines, IA on 1/20/2010

Crutchfield Customer Review (What's this?)

I liked this bracket slightly better than the PB65 size due to the tab and slot side wing design instead of machine screws. However, you'll spend more time installing and adjusting these brackets than the actual speakers. For the price, you get some molded plastic, which seem to be relatively low cost to produce. When you screw in the drywall style screws to the studs, the bracket gets pulled out of level or square, as the screw drifts in the wood. The screws that came with it, will break off w/ minimal torque, so discard those and use drywall screws. If the whole bracket and side wings were molded one piece, it would be better. Installing the bracket before drywall will cause you to have to cut and line up the drywall hole precisely with the bracket, but if you skip the bracket and cut the hole in the drywall later, then the hole position is less critical. My "open box" bracket pair did not come with hardware or instructions. Also, I had to by a pair of the brackets for 1 center channel MC85, so I wasted 1 bracket. Can they sell open box brackets in singles?




Hands-on research

Product Research


Overview: The Polk PB SC85s are pre-construction brackets for the Polk RC85i and MC85 in-wall speakers. The included wings mount to the supplied speaker bracket and to the wall studs, giving you a sturdy mount to install the speakers. Each bracket requires a cutout in the drywall approximately 8-15/16" wide and 12-11/16" tall.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Remodeling Basement and wanted them to pair with The R/C 85i Speakers in a " New Construction" Rec. Room. Wanted a professional looking install. [ Greg  Jul 06, 2018 ]
Great value for the money, and quality and rating are fabulous!! [ jeff  May 20, 2018 ]
The ability to allow more accuracy and confirmation of a professional install [ Corey  Dec 16, 2017 ]
We are building a home theater in our basement, and these brackets will make the installation of the Polk Audio speakers I selected easy and secure. [ Stephen  Nov 22, 2017 ]
It is the correct bracket for the Polk rc85i speaker. [ Dorin  Nov 21, 2017 ]
Renovating room and this will make in easy for drywall crew to mark and cut out. [ Guest  Sep 28, 2017 ]
these brackets are very cheap not sure I would buy again. Not for 50.00 [ DOUGLAS J  May 02, 2016 ]
Take advantage of preconstruction opportunities to secure in wall speakers optimally. [ Eric  Jan 23, 2016 ]
to mount the speakers... [ Joseph  Dec 08, 2015 ]

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