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Solid state design options...

What are the importance (to you) of these design options:

1. Zero Global Feedback
2. Fully Balanced Architectrure
3. Output Class (A vs. A/B)
4. Capacitance / Instantaneous Current Delivery
5. Dampening Factor

Any other ones that should be put into the mix for discussion?

I've been doing some reading where pundants claim these are very important considerations, and some who say they are nothing more than marketing gimmicks.

Thoughts?

I know...You should listen to the amps and let your ears guide you. That is a given, so those replies are not needed.
nrenter

Showing 2 responses by gregm

gregm
3,021 posts
 
A small point: DF is the ratio of the load impedance to the internal impedance of the amp. If we average the speaker load to 8ohms, just how do we get a DF of 25 or 50 (unless we're marketers)?? In other words, how low must the amp's impedance be to reach these beautiful ratios?
Where's Sean and other EE's?
gregm
3,021 posts
 
Very interesting and well put, Bombay! (The EE in you manifested himself, thankfully:))

Engineering a constant current device is a bit tricky, (albeit nice for speakers) especially when we go over the sacrosant 2,83V level. Astonishingly, it seems that some SS amps have been designed with the full throttle in mind, linearity falling as we lower the volume.

For that matter, how many of us nowadays listen at more than ~4V at the amp output -- with a 89-90db efficiency speaker that's enough to tire the ear pretty fast!
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