[sdiy] Re: crystal clear

[Ingo Debus]

Don Tillman wrote:
 > Imagine a simple biamping system:
 >   Low amp: 100 watts
 >   High amp: 50 watts
 >
 > The obvious single amp version of this would suggest that a full range
 > amp equivalent would be 150 Watts.
 >
 > But because the maximum amplifier voltage is proportional to the
 > square root of the maximum amplifier power, the full range amp's power
 > rating will need to be able to handle the sum of those voltages:
 >
 >   Full range amp: (sqrt(100)) + sqrt(50))^2 => 291 watts
 >
 > This is somewhat bogus reasoning because you will only use those
 > 291 watts during occasional peaks.  But it does mean that biamping
 > allows you to handle more peak power than you'd expect.

I don't quite understand why you can add the voltages here, while when
stacking two full range systems you add the powers.

Ingo