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will anything bad happen... Ohms-centric
Posted: Fri Mar 07, 2008 7:35 pm
by timhulio
Got my heart set on a Bandmaster. Output is 4 Ohms. I've got a nice cab rated at 8 Ohms (2 x 16 Ohm speakers in parallel... or series... I can't remember).
So, if I were to use a Bandmaster with the 8 Ohm cab, what would happen?
Re: will anything bad happen... Ohms-centric
Posted: Fri Mar 07, 2008 7:55 pm
by tribi9
timhulio wrote:Got my heart set on a Bandmaster. Output is 4 Ohms. I've got a nice cab rated at 8 Ohms (2 x 16 Ohm speakers in parallel... or series... I can't remember).
So, if I were to use a Bandmaster with the 8 Ohm cab, what would happen?
I think u should be good!
Posted: Fri Mar 07, 2008 8:06 pm
by timhulio
I am good... but will anything bad happen to my output transformer?
MIKE??? MIKE?
Posted: Fri Mar 07, 2008 8:31 pm
by tribi9
timhulio wrote:I am good... but will anything bad happen to my output transformer?
MIKE??? MIKE?
No, because your amp puts put 4 ohms and your speaker can handle 8 ohms, if you were to send a load bigger than what the speaker can handle then u'd probably fuck up the tranny thats how i understand it works.
Posted: Fri Mar 07, 2008 8:35 pm
by NickS
Posted: Fri Mar 07, 2008 8:56 pm
by Mike
timhulio wrote:I am good... but will anything bad happen to my output transformer?
MIKE??? MIKE?
Most people do this just fine with Fender amps, the transformers are well engineered enough to cope with the mismatch.
Have fun. I love Bandmasters.
Posted: Fri Mar 07, 2008 9:02 pm
by Sloan
LOW TO HIGH, YOU CAN FLY.
HIGH TO LOW, NO GO.
I had to learn that after fucking up my cool ohms guide.
Posted: Fri Mar 07, 2008 9:34 pm
by filtercap
Mike wrote:timhulio wrote:I am good... but will anything bad happen to my output transformer?
MIKE??? MIKE?
Most people do this just fine with Fender amps, the transformers are well engineered enough to cope with the mismatch.
Have fun. I love Bandmasters.
Mike's the Minister of Impedance.
To throw a little more in about what size of mismatch he's talking about: word is that with Fenders, obviously a spot-on match is best, but a 2:1 mismatch in either direction is likely to be just fine. So for a 4-ohm amp, that would be down to 4/2 = 2 ohms, or up to 4x2 = 8 ohms. For some reason, the thought of going low makes me nervous. Maybe it's that 2 ohms seems like almost no ohms at all.
You had it right the first time, two 16-ohm speakers in parallel = 8 ohms. Two 4-ohm speakers in
series will also give you 8 ohms.
Posted: Fri Mar 07, 2008 9:50 pm
by timhulio
Ah that's great news. Thanks guys. This probably won't be for long anyway- I've got another 8 Ohm Celestion century vintage back in London, so it's not inconceivable that I could get another 8 Ohm speaker, wire them in parallel and with a switch for 4 Ohms (both speakers) and 8 Ohm (just one). That way I could still use the Tiny Terror sometimes. Yay.
Posted: Fri Mar 07, 2008 10:12 pm
by Mike
timhulio wrote:Ah that's great news. Thanks guys. This probably won't be for long anyway- I've got another 8 Ohm Celestion century vintage back in London, so it's not inconceivable that I could get another 8 Ohm speaker, wire them in parallel and with a switch for 4 Ohms (both speakers) and 8 Ohm (just one). That way I could still use the Tiny Terror sometimes. Yay.
Sounds like a plan. Definitely wouldn't recommend running the TT with other than an 8 or 16 ohm load, but the Bandmaster will be fine. You won't get full output as the mismatch means you're not 100% efficient but I'm sure it won't be noticeable, or a problem.