Speakers Defective?

Discussion of Speakers, Cabinets and Cabinet Building

Moderators: pompeiisneaks, Colossal

Post Reply
Bombacaototal
Posts: 1673
Joined: Thu Oct 06, 2016 5:53 am

Speakers Defective?

Post by Bombacaototal »

I am interested on a 8ohm speaker but there are 2 issues I am concerned about
1) there is something which looks like a drop of water on the paper
2) the resistance reading is rather low

Both pictures attached.

Should these be points of concern sonically?
Attachments
BD2EE056-573A-4FB8-AC41-3BB2BF465708.png
262ABDDC-C6D2-4E96-8E2A-A2891377AA67.png
User avatar
pompeiisneaks
Site Admin
Posts: 4222
Joined: Sat Jan 14, 2017 4:36 pm
Location: Washington State, USA
Contact:

Re: Speakers Defective?

Post by pompeiisneaks »

That resistance reading isn't 'low' Remember speakers are 8ohms impedance, not resistance. That's just the static resistance at hte frequency the DMM works at, and doesn't account for inductance etc that creates the reactance part of the speaker.

That spot on the speaker to me looks like it could be a repair that was done, but not sure. The speaker cone can be repaired and work fine, but it depends on the size of the repair and location, etc. The only way to know would be to hear the speaker in use. Are you thinking of buying this one? If so, I'd make sure you can return it if it sounds meh, that cone may be fine, or may sound horrid.

~Phil
tUber Nerd!
Bombacaototal
Posts: 1673
Joined: Thu Oct 06, 2016 5:53 am

Re: Speakers Defective?

Post by Bombacaototal »

Thanks for the help Phil for the explanation regarding resistance.

Yes I am interested in buying this speaker but just concerned with the “drop” on the cone.

This is what the seller is saying
It has a small aesthetic blemish from a drop of water my friend annoyingly didn't leave to dry naturally.
Attachments
51A240B0-3185-4B20-8D09-50DDEEDB727A.png
User avatar
pompeiisneaks
Site Admin
Posts: 4222
Joined: Sat Jan 14, 2017 4:36 pm
Location: Washington State, USA
Contact:

Re: Speakers Defective?

Post by pompeiisneaks »

Yeah dunno, hard to say, if it's not through the cone, it means that part of the cone is potentially weaker and after use may pop/tear. I'm no expert on that kind of damage, so I may be completely up in the night though.

Maybe someone like Scumback Speakers will chime in with real world experience on that.

~Phil
tUber Nerd!
Bombacaototal
Posts: 1673
Joined: Thu Oct 06, 2016 5:53 am

Re: Speakers Defective?

Post by Bombacaototal »

Thanks Phil, I think I will stay away from this one
User avatar
xtian
Posts: 7014
Joined: Mon Apr 19, 2010 8:15 pm
Location: NorCal
Contact:

Re: Speakers Defective?

Post by xtian »

From the photo, that looks like a significant tear!
I build and repair tube amps. http://amps.monkeymatic.com
User avatar
Scumback Speakers
Posts: 754
Joined: Tue Nov 14, 2006 5:49 pm

Re: Speakers Defective?

Post by Scumback Speakers »

If it was a water stain, it would stain, not have the cone paper tear or rip, which is what I see in the OP's pic.
Scumback - Guitar Speakers That Kick Ass!
http://youtu.be/u6U30BV2kFM
sales@scumbackspeakers.com
www.scumbackspeakers.com
https://www.facebook.com/scumbackspeakers/
https://www.instagram.com/scumback_speakers/
Bombacaototal
Posts: 1673
Joined: Thu Oct 06, 2016 5:53 am

Re: Speakers Defective?

Post by Bombacaototal »

Thanks a lot xtian and scumback. I agree, probably the seller is not being very honest
User avatar
Leo_Gnardo
Posts: 2583
Joined: Thu Sep 27, 2012 1:33 pm
Location: Dogpatch-on-Hudson

Re: Speakers Defective?

Post by Leo_Gnardo »

If the offering price was cheap enough, I'd just patch the damaged area. I'm sure there are lots of suggestions our members could make. I use hemp rolling paper, with Elmer's white glue, slightly watered down. You have to be very careful because wet cone paper falls apart very easily.
down technical blind alleys . . .
Bombacaototal
Posts: 1673
Joined: Thu Oct 06, 2016 5:53 am

Re: Speakers Defective?

Post by Bombacaototal »

The seller is actually selling expensive. GBP 120 for these EVM speakers...I decided to pass
Post Reply