power supply crossover diy

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DUG

DUG

Member
Joined 2003
7.1 system-bi-amped

=15 amplifiers (min)

@ 20VA = 1.3W per amplifier

Seems a little light on the power but it could be.

I would say with absolutely no detail...No

We are both guessing and making assumptions.

We both agree that there is not enough detail to provide a definite answer.

:)
 
F

fpitas

Member
Joined 2011
nek antunes said:
excuse my English
My amp is for lm1875 tweeter and woofer for lm3886.
The system is 7.1.
Bi amplified.
My crossover has 28 Ampop (NE5532). Linkwitz-Riley Electronic Crossover
I do not know which the power transformer, for the power suplly crossover.
thanks
Click to expand...

So, you are building a power supply for an electronic crossover? 20VA may well be enough in that case. The NE5532s can draw as much as 16mA per chip, so 28 will require 448mA maximum. As long as your power supply can handle that, you should be fine.
 
JMFahey

JMFahey

Member
Joined 2009
Your 28 Op Amps need almost 1/2 Ampere which considering +/-15V rails mean 15W or VA.
But you tell us nothing about the PSU, whether it's raw or regulated, etc.

By the way; you built a dozen stereo crossovers and run 14 shielded cables to separate amplifiers?
Or you built a rack for all those amps and run 4 wires for each speaker?
 
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