Check my sums please

[tomgwyther]

Hello all,

I wonder if you could help. I'm building a new on-stage speaker system from scratch.

Could someone check my working so as I don't accidently blow something up.

 

A) 3 x speaker coils @ 8 ohms wired parallel = total impedance of 2 ohms

B) 3 x speaker coils @ 8 ohms wired in series = total impedance 24 ohms

 

The 'load' on circuit B is less than that of circuit A

 

If I feed 100 watts into an the + terminal of an 8 ohm coil, whats the wattage on the - terminal? (Given that the voltage is 100v constant)

I don't know the maths well enough to work out the amperage

 

Dumb questions for a sound engineer to be asking I know, but I seldom build things from scratch.

 

any help would be much appreciated

 

Thanks guys