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RE: Anyone heard First Watt F4?

Posted by Srajan Ebaen (R) on June 1, 2007 at 22:01:38

In Reply to: Anyone heard First Watt F4? posted by eril on June 1, 2007 at 15:53:02:

I understand that Nelson Pass incorporated a minor revision to protect the amp against scenarios where a user will precede the F4 with too powerful an amp.

The F4 is a current gain amp without any voltage gain (in fact, its voltage gain is minus 0.5dB) so the system's voltage gain must be handled by your preamp. Or, a low-power amp can leash its outputs to the F4's inputs in which case the F4 acts as power-buffer follower amp that provides current and impedance matching to the speakers. The promise there is to make a micro-power SET drive speakers it's otherwise incapable of.

Since that follower amp concept is one part of the F4's design brief, the designer simply wanted to insure that nothing bad happens if somebody decided to strap the F4/s to a, say 100wpc hi-gain power amp.

Hence deliveries of first amps have been delayed. At least that's my understanding.

Cheers,

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The Cable Cooker

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