2 speaker outs on my amp, do they have to be the same Impedance?

[Nightburst]

I was wondering if I could mismatch impedances this way since there are 2 ajustable switches above the speaker out jacks.

Just put 2 vintage 30 Celestions in my 4x12 cab and disconnected the other 2 speakers, I love the sound but I liked the bigger sound of 4 speakers.

I've wired 2 Vintage 30 (8 ohms) speakers parallel making an 4 ohm load.
So would it damage the amp if I would wire the 2 g12t75 (16 ohms) in parallel to another jack and connect it to the 2nd speaker out on the amp set to 8 ohm?

 

[Zerberus]

Re: 2 speaker outs on my amp, do they have to be the same Impedance?

Depends on the amp, some power sections have "Dual Mono Blocks" instead of one true stereo block, and on an DMB it´s a non issue, you can even blow one side up and the other will still work.

On a true stereo block it depends entirely on the way the output section was designed, but usually you´ll have to do the same math as when using 2 cabs on one output.......

 

[Nightburst]

Re: 2 speaker outs on my amp, do they have to be the same Impedance?

I have no idea what Bogner uses for his amps.

What amp did you get? Got clips?

 

[Zerberus]

Re: 2 speaker outs on my amp, do they have to be the same Impedance?

None yet, I don´t have the time or the cash to go amp shopping right now...

 

[Nightburst]

Re: 2 speaker outs on my amp, do they have to be the same Impedance?

Too bad. Wish you all the luck hunting a good amp.

Sooo anyone else knows about running 2 different speakers on one amp?