Zen-biamping

[ijomojo]

Hello Everyone,

I carry with the thought of building a Zen-biamping version, driving two-way loudspeakers. Active crossover frequency is around 3000Hz. Since I will go unbalanced, I thought of a ZenV4 for the low-mid frequency range.

For the tweeter, I asume, no feedback would be the best choice, since power plays only a subordinate role in that range of frequency.
Any suggestions for the high freq range?

Thx,
Joseph

 

[Nelson Pass]

You might consider the F2 clone schematics which haveappeared on this forum.

 

[ijomojo]

Thank you for the suggestion Mr. Pass.

The topology of the firstwatt amps is indeed very interesting, but leads me to another (maybe stupid) question:
How could I match an active current source amp like the f2 clone to a gain 4dB lower than the zen4 (low-mid speakers are 94dB, tweeter is 98dB)? Measuring the input and output voltages across a dummy load doesn't make much sense here