Krell FPB 400CX vs PASS LABS X-350.5

According to the latest stereophile measurement XA-30.5 clips (1% THD) at around 100W. XA-30.5 or XA-60.5 may be just fine for your use. FWIW I use First Watt F5 at 25Wpc with my Focal Electras in 15 x 20 room, and I have never felt I needed more power.

Would be interested to hear John DeVore's thoughts / preferences between the two amp in question.
Pdreher (System | Threads | Answers)

John Devore has already commented above:

if the XA-60.5 is remotely close in price to the X-350.5 go for the XA. It will sound enormously powerful on the Nines and will have subtlety and nuance the AB amp lacks.

Happy listening,
John DeVore
Jldcat (System | Answers)

More than anyone, the company owner should know how an amp would perform on the Nines .

Tvad - my bad... at the risk of sounding like a kiss ass, I agree with your last statement

Do you all think the smaller Pass Labs XA-30.5 would be enough for the Nines. My room is 14' x 24'?

Would that be a better choice than the X-350.5??

I think you should contact Reno HiFi and arrange an in-home trial and bypass
the speculation.

I also think John Devore has already mentioned what amps he believes would
work well.

In my system and room (93dB speakers), the XA-30.5 was very close, but
wouldn't quite get the job done in the volume department. If you audition the
XA-30.5, you'll know how the XA-.5 series sound on the Nines, and then you
can move up to more power if necessary.

IMO, any of the XA-.5 series Pass amps are better choices than the X-350.5
because of their more refined sound.