In-wll / In-ceiling speakers

[Rupp]

Ok I'm confused. Most ceilings do not have insulation? All of my ceilings have insulation. Even the rooms under other rooms. So if blown in insulation is present what does one need to do?

 

[DavidL]

Rupp, if you have cellulose or fiberglass blown insulation, push it away from the speaker opening (make a 10" "cocoon") and tuck a small patch of fiberglass roll insulation in it's place without compressing it. You want it loose but not as loose as blown insulation. The idea is to keep insulation away from the speaker cone which vibrates, creating sound waves. Make sure to take the paper off the fiberglass roll insulation.

 

[Rupp]

DavidL,
This all makes since except for the paper part. Why take the paper off?

 

[DavidL]

Noise from the paper.
With blown in insulation (cellulose), you don't need a vaper barrier anyway.

 

[Treetop]

Another option, if you dont have a wall in the back of your "theatre" room is to use Ceiling Mounts if you don't want to use in-ceiling speakers.

Now back on topic...

Would it be possible to use car speakers in the ceiling? I was thinking of putting them in a small box (similiar to whats in most cars). I know absolutely nothing about car sound systems, so Im not even sure if it feasible much less a good route to take.

This question is only for a proof of concept as I rent and cant be cutting holes in their ceiling...

 

[DavidL]

The major diff with car speakers is they are built to take heat, vibration and moisture better than a home speaker. There should be no prob with mounting in a ceiling.

I go the other way - use high end home speakers in the car. Almost always sound better than the best car speakers.

 

[Squintz]

I thought car speakers had a differnt impedance rating also. What are car speakers rated at? Just to let you guys know i will be posting a review of 6.5" in ceiling speakers from channel vision. I just bought 4 of them for my home theather surround sound and i think they are very nice. I got them from automatedoutlet.com in the audio section. $107.50 for a pair. thats just over $50 per speaker. I dont think you can get a 6.5" car speaker that will sound better at that price. i could be wrong tho!...

The review should be up tonight but i have to wait until i get home to add pictures. I wish i could add sound to the review but it just wouldnt work. I guess i will just have to throw a football party once its all finished :huh:

 

[jlehnert]

I don't know if it has changed, but ten years ago when I was still working in consumer electronics, car speakers were 4 ohms impedance, while home speakers were 8 ohm.

 

[Squintz]

Sounds about right to me.

Can you wire two 4ohm car speakers in series to get the 8ohms?

 

[Rupp]

Squintz ,
I'm looking foreard to your review as I need a couple of speakers in 2 more rooms.

 

[smee]

I don't know if it has changed, but ten years ago when I was still working in consumer electronics, car speakers were 4 ohms impedance, while home speakers were 8 ohm.

A lot of receivers will let you switch between 4 and 8 ohm impedance speakers (a switch on the back of the receiver). A lot of speakers spec'd at 8 ohms are actually lower, anyway.