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Fist Watt F6 vs Pass Labs XA 25

I’m thinking about an upgrade regarding my power amp which is a First Watt F6 dual mono (source: LAB 12 Dac 1 Reference, "speakers": Abyss 1266 PHI TC, preamp: Dave Slagle Autoformer).

I can’t say I wouldn’t be satisfied with this configuration but I’d like to try something even more engaging.

For the moment I’m intrigued by the XA 25 but never had the chance to give it a try in my system. 

Most of the reviews just compare the F7 to the XA 25 but I would be happy to hear experiences from users who had F6 and XA 25 side by side.

Is it worth an upgrade and which exact differences could I expect sonically?

 

barrista0611
tubebuffer
417 posts
 

What fist watt? That good with my schlockport?

soix
8,647 posts
 

But does the Clayton slide into class A/B and then provide 80w into 8 ohms and 130 into 4?

No, but at 50wpc and 100wpc into 8 and 4 Ohms, respectively, you get to stay in full Class A for all listening.  Personally, I’d have to really need those extra 30wpc to go with the Pass, but that’s me. 

mikem
260 posts
 

@keithr 

The XA25 is quite different compared to the other Pass amps. Those who never heard it sometimes generalize the sound. It’s quite different in that it only uses 1 pair of puck sized output transistors per channel vs the more typical 14 pairs per side in parallel, like the XA30.8 uses. 
The output side in the XA25 is also directly connected , shorter path to output, which removes many resistors and other parts in the signal path.  It sounds different from the others in the XA lineup, from my experiences..

mikem
260 posts
 

@tubebuffer 

how sensitive are your speakers? And their configuration?

keithr
1,304 posts
 

@mikem I've actually owned the XA25, tried in multiple systems, and my comment stands. In FW land, only have heard the SIT3 not the newer F8 though. 

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