Low wattage amp into higher wattage cab. And impedance

[Twincam]

I'm now running my 15-17w dominator into a 8 ohm 250w celestion. It seems to work fine and sound a bit better than its original 16 ohm 50w celestion.

The dominator is 12 ohm. I've read various other things about valve amps and impedance mismatching.

But also is driving a higher wattage speaker with only a small amount of watts ok?

[JapanAxe]

The rule-of-thumb with impedances on valve amps is you can go safely either way by a factor of 2. So if your Dominator's output socket is rated at 12ohm, you can run it into anything between 6ohm and 24ohm - in practice, you should be fine into 8ohm or 16ohm loads.

There should be no problem driving your 250W Celestion - you won't hurt the amp or the speaker.

[chris_b]

[quote name='Twincam' timestamp='1463229947' post='3049746']
But also is driving a higher wattage speaker with only a small amount of watts ok?
[/quote]

Not a problem at all.

[Twincam]

[quote name='JapanAxe' timestamp='1463230157' post='3049750']
The rule-of-thumb with impedances on valve amps is you can go safely either way by a factor of 2. So if your Dominator's output socket is rated at 12ohm, you can run it into anything between 6ohm and 24ohm - in practice, you should be fine into 8ohm or 16ohm loads.

There should be no problem driving your 250W Celestion - you won't hurt the amp or the speaker.
[/quote]

Yes that is kinda my understanding. Cool.

[Roland Rock]

Like a granny pootling along in a Porsche