Dope Cloth Surrounds on Pioneer CS-77's?

[krameraxeman]

I have a pair of Pioneer CS-77's with cloth surrounds. The surrounds do not appear to have been sealed or doped. Does anyone have experience doping Pioneer CS series cloth surrounds? I'm curious if it's a good idea.

Additionally, one of my woofers has a small hole in it's surround. The speaker doesn't sound noticeably different from the one with no holes. Should I attempt to repair or just leave it alone?

 

[Wigwam Jones]

Well, I have not tried it, but as the CS-77 speakers are ported, I suspect it matters a bit less than it would if they were sealed. As to the hole, that's a shame, but if it doesn't seem to affect the sound, I would not worry too much about it.

 

[stickman]

I know I sound like a broken record around here but I'd probably use "Non-Acidic" Rubber Cement from an office supply store. Make sure the cloth surrounds are clean and then paint on a thin coat of rubber cement to add sealing and a bit of damping factor. I wouldn't expect there to be a noticeable change in the woofers sound quality, but it can't possibly hurt anything and it should seal the hole if it's small enough.

 

[Wigwam Jones]

I know I sound like a broken record around here but I'd probably use "Non-Acidic" Rubber Cement from an office supply store. Make sure the cloth surrounds are clean and then paint on a thin coat of rubber cement to add sealing and a bit of damping factor. I wouldn't expect there to be a noticeable change in the woofers sound quality, but it can't possibly hurt anything and it should seal the hole if it's small enough.

I'm not saying you're wrong (in fact I have no idea if it would help or hurt the speakers to try your idea), but just for the record, it's tough to 'seal' these speakers. They've got a vent on them that's bigger than a hood scoop on a hemi cuda. You ain't sealing nothing on those speakers. You could roll a baseball into the opening of the vent.

 

[89grand]

Yeah, you won't seal the enclosure of course, but ported systems are designed to have only one opening, and that's the port. If the hole in the surround is very small, it probably won't make a bit of difference, but if it's too big, the enclosure will no longer act as intended.

I actually think unintended air leaks are a bigger issue on ported systems than sealed ones.

 

[krameraxeman]

Thanks guys. I was curious if sealing the surrounds on a bass reflex box would matter or not. I'm thinking that since it wasn't done originally by Pioneer, I won't do it either. This is sort of impossible to undo if it screws things up.