Speakers for '72 Twin Reverb, part 2

[Mephis]

Re: Speakers for '72 Twin Reverb, part 2

Woah ohm mismatch!

He must have wired them incorrectly. Do not play that amp until you fix it!

 

[bungalowbill]

Re: Speakers for '72 Twin Reverb, part 2

Woah ohm mismatch!

He must have wired them incorrectly. Do not play that amp until you fix it!

Big +1, small fee for a tech to wire it correctly.

 

[Robert Delahunt]

Re: Speakers for '72 Twin Reverb, part 2

Ah, ok. The back panel says 4 ohms 100W, but that's the external cab jack. I found the diagram, they're parallel +'s to tip, -'s to ring. The speakers are supposed to be 8 ohms by an official Fender schematic

 

[ES350]

Re: Speakers for '72 Twin Reverb, part 2

The Twin wants a 4 ohm load---wire in parallel. If you are unsure what that means, do a search for speaker wiring and all will be revealed. Sounds like you have other amp issues anyway...

 

[Robert Delahunt]

Re: Speakers for '72 Twin Reverb, part 2

Correct:

Resistors in Parallel

In a parallel circuit, current is divided among multiple paths. This means that two resistors in parallel have a lower equivalent resistance than either of the parallel resistors, since both resistors allow current to pass. Two resistors in parallel will be equivalent to a resistor that is twice as wide.

Since conductances (the inverse of resistance) add in parallel....

For example, two 4 Ω resistors in parallel have an equivalent resistance of only 2 Ω.

I could swear it was divide, so I guess the guys at work were wrong (but they also said they couldn't remember lol)