• Please note that Audiokarma will be offline briefly for updates early on Monday morning, September 28th.

Infinity RS 4b Speakers

F

Frankrentef

New Member
Greetings all. My latest "dumpster diving" at my local thrift store revealed a set of Infinity RS 4b Speakers. Excellent condition for $5.00 each! Now that I have them.... what exactly do I have? Google is not yielding much info.

THNX!
 
Register to hide this ad
Hi Frank

Check out the thread: Information on the net, there are a number of links with good info.


PRODUCT SPECIFICATIONS

Frequency Response: 38Hz - 32kHz (+/-3dB)
Crossover Frequency(ies): 600Hz, 4kHz
Nominal Impedance: 4 ohms - 8 ohms
Recommended Power Amplifier Range: 40 - 150 watts RMS / channel
Woofer: 8" polypropelene
Midrange Driver: Polydome
Tweeter: EMIT



Have you hooked them up yet? How do they sound?

PS I moved this thread to the Infinity forum
 
5$ each. That is incredible. No way you can go wrong if they work.....probably even if they require some work. Nice catch!

I've never heard any. Would like to hear your impressions. Pics would be nice too :yes:
 
Gee, my local GW has a pair priced at $30 each. Need new surrounds but not in to bad of shape. $5 bucks is a buy. I passed, at least for the moment.
 
Those are some really good speakers. I had a pair back in the 80's and am sorry I ever got rid of them. Some of the best speakers for Jazz I have listenedt to. They were very power hungry though. I had to replace my woofers in the early 90's. I ended up using a pair of Pyle 8" drivers, I couldn't get new ones from Infinity and I couldn't find anyone to repair the drivers. They are well worth what you paid. They are also well worth repairing if you feel so inclined.

John
 
Well, I've had to redo the foam around the edge ($30.00 kit) and they work great! Except for one of the 8" speakers has a vibration. I can put my finger with very little pressure at one place on the cone and the vibration stops. Any suggestions? Replace the speaker?

THNX
 
Clarification... (I'm a newbie so look over my lack of terms) by cone I mean don't mean the center soft cone but the area between the center and foam.
 
Sounds like you might have a little voice coil rub going on there Frank.

With the amp off push gently in on the woofer cone to see if you can feel it rub. If thats the case you'll need to carefully remove the outter edge of the surround from the basket, remove the dust cover, shim it and reglue it.

You could also remove the offending woofer and check it with a 9 volt battery to see if it rubs as well.

Other than that, I'm not sure what else you'd have going on there.
 
One other possible solution:

Once you figure out where the rub is, try rotating the woofer so that the rub point is at the top. There's a small chance that gravity will solve the problem for you. Worth trying before you involve a lot of work and/or money.
 
Help,

Vibration is present whenever I turn up to around 25+ watts. Does anyone have a "how to" link for dummies like me. I'd like to save these speakers, really sound sweet.

THNX
 
Sorry Frank I can't think of a link that would help.

Sounds like you need to carefully remove the outter edge of the surround and shim the voice coil and reglue. Or refoam the offending woofer from scratch.

Which is the only way to get rid of voice coil rub, if turning the woofer 180 degrees didn't work.
 
Thnx,

So I cut out (almost but not totally) the center "surround". Take something akin to a business card and shim up the speaker (allow the center of the speaker cone to rest on the top of the card) and then reglue the center.

Yes?
 
Remove either side of the surround inner or outter. I usually do the outter.

Remove the dust cap carefully and shim so that it just barely moves up and down.

Reglue and then glue the dust cap back on. Use a straw after you apply the glue and hold it (dust cap) with suction and place it back on center.

Should fix it right up!
 
Dust Cap equals the "dome" in the center, yes? I'm trying to find a breakdown of speaker parts with the corrent names but as yet to find it.

THNX
 
Thanks Ken, I had one of those book marked a while ago. But they didn't make the tranfer to the new puter, then I forgot about them.

Good reference resource :thmbsp:
 
You must log in or register to reply here.
Back
Top Bottom