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Planar Speaker Asylum Welcome! Need support, you got it. Or share your ideas and experiences. |
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In Reply to: RE: Class D , Class-a , Zmin and phase is Very important posted by Satie on February 20, 2016 at 18:36:27:
Technically speaking you can only have a full class-A amp at 8 ohm and higher , so for most their is no such thing as full class -a( ok talking about DC , SS amps ) when you have a z-min of 4 ohm and lower. How much bias is actually necessary is very much dependent on when the amp slides out of class-a on a particular setup. impedance , sensitivity and typical listening levels play a big role here, if you listen at relatively low levels on a high sensitivity speaker , you will most likely favor an amplifier running high class -a bias into that Zload , with low sensitivity speakers at a moderate to high listening level , not so much..
On a pr of scinnies we lowered the bias considerably on a KSA200 , it takes time, there's no magic number, bias is gradually increased and adjusted for best sonics , at the listening levels required , we ended up with a relatively cool running Krell and speed galore , the dynamic contrast we were able to obtain was fantastic compared to it's original hi bias operation , much more life and energy to the music ...
Good Class-D has this jump factor in spades , SET's too , it is one of the main reasons i keep a close ear to class-d , unfortunately and like SET 's , their ( class-D) sonics are very much impedance dependent and only the Devialets dont seem to have this issue , but they also dont have the high jump factor .
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Follow Ups
- RE: Class D , Class-a , Zmin and phase is Very important - A.Wayne 20:26:32 02/20/16 (3)
- RE: Class D , Class-a , Zmin and phase is Very important - morricab 14:56:31 02/26/16 (1)
- RE: Class D , Class-a , Zmin and phase is Very important - Satie 15:57:44 02/26/16 (0)
- RE: Class D , Class-a , Zmin and phase is Very important - Satie 21:57:13 02/20/16 (0)
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