quick question about old speakers

[thebrontosaurus]

i found these old scott speakers at a yard sale. they are 6 - 8 ohms and they work fine, but i didnt understand how the connectors were marked. they were marked like so


O and H

which is positive and negative?
i geuss but im not sure.

thanks,
noah

 

[punkin]

I don't know about the O and H. If they're both marked the same, call the "O" positive and the "H" negative...it won't matter as long as both are in phase. Meaning that both speakers pop out and/or in together in unison. Here's an easy trick...put a 9 volt battery accross the speaker terminal of speaker #1...then do the same for #2. Note which way the speakers pop..in, or out...then, wire them up so that they do the same thing at the same time....just pulse it...watch which way the speaker pops...in or out. Don't hold the battery terminal on...just pulse it...you'll hear a light bump or pop.

Anyone disagree with this approach? Trying to keep it simple.

 

[boingoman]

I don't know about the O and H. If they're both marked the same, call the "O" positive and the "H" negative...it won't matter as long as both are in phase. Meaning that both speakers pop out and/or in together in unison. Here's an easy trick...put a 9 volt battery accross the speaker terminal of speaker #1...then do the same for #2. Note which way the speakers pop..in, or out...then, wire them up so that they do the same thing at the same time....just pulse it...watch which way the speaker pops...in or out. Don't hold the battery terminal on...just pulse it...you'll hear a light bump or pop.

Anyone disagree with this approach? Trying to keep it simple.

No, that's the way I would do it, unless I felt like opening the box and looking, which wouldn't help if the drivers weren't marked + and -.

The only thing I'd add is that when you find which way the battery makes the speaker move out, mark the wires with the same polarity, and hook them up to your amp that way. That will make them the same polarity as practically all speakers made these days, which is postive voltage on the + terminal makes the speaker cone move forward.