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Why do I like Class AB better than Class A?

So I just purchased a Plinius SA 100 MKIII, and have had 2 listening sessions comparing both with the toggle switch. To me clearly the AB is more detailed and focused, the A is warm but a little fuzzy and bloated, although I would give it a slight nod on just vocal songs. Am I just not use to the sound as this is my first A amp or have I not let it properly warm up for class A (1hour or so).
Don't get me wrong, i love the amp, great bottom end slam but I don't hear the holy grail from Class A. Thanks in advance for the input guys.
barfbag
ngjockey
1,042 posts
 
I have a couple of the same amps. The difference between those modes of operation can be subtle, depending on the recording and the volume. Patience... you'll hear it. After a while, you'll never want to listen in anything other than class A. Probably getting conditioned to the "laid-back" character of the amp as well.
syntax's avatar
syntax
2,193 posts
 
Sounds like God is telling you to upgrade ....
lak's avatar
Ag insider logo xs@2x
lak
4,682 posts
 
Barfbag,
I have owned the Plinius III and always thought it sounded better in class A. How long are you allowing it to warms up? Needs maybe 20 minutes to sound like class A.
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pbnaudio's avatar
pbnaudio
1,614 posts
 
Elizabeth,

Your PURE Class A Forte 4A was biased at 800 mA per node - resulting in an astonishing 9 watts in Pure class A into a 8 ohm load - the rest of it in A/B - and yes it ran hot, but it sounded pretty good. I have had several of them through here. My first "real" amp was its predecessor the 1A - in its a day a pretty good sounding amp too.

Peter
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