Sonus Faber Stradivari amp: X600.5 or X1000.5 ?

Don't get so hung up on "watt" ratings. I've read where XA60.5s were compared to X250.5s...and were preferred.

How can that be? A lowly "60 WPC" class A amp slugging it out with a "250 WPC" class A/B and coming out on top?

It's telling that XA100.5s can be had for about the same money as the X600.5s.

The XA.5 amps are just in a different league.

And I own X260.5 monos and XA60.5 monos. I run the XA60.5s daily. I really like the X260.5s, but they don't outpace the XA60.5s, and I like the sound of the XA.5s better.

Think on that: I'm not sure how much "Class A" watts the X260.5s are supposed to deliver, but the "little" XA60.5s are more than a match, even at high volume levels.

If I had the funds, I'd have all XA.5s. Whatever the class A rating of the X.5, I wouldn't care. A "smaller" rated XA.5 will more than compensate. I'd really like to compare a pair of X600.5s and a pair of XA160.5s...I know where my money would be.

Also, the XA and XA.5 amps are different machines. Try not to get highjacked by any comments about XA amps and their relative performance.

How can that be? A lowly "60 WPC" class A amp slugging it out with a "250 WPC" class A/B and coming out on top?

Pass haevily underrates the output power of all their XA series amps. The lil XA-30.5 was measured in Stereophile, and turned out to put down over 130W @ 8 Ohms vs advertised 30W.

See LINK

OK i got it. But my next question is: how loud can i turn a 92db+ speaker with 160WPC on class A if im gonna change my order from X600.5 to XA160.5. I mean how many db i will have at max volume.

160watts into a 92db efficient speaker should reach 114db .

Tmsorosk:

The impedance of my speakers is 4 ohms. So this means the XA160.5 will double the watts. So this will means over 320 WPC. That will result in even higher volume. I think over 114 db. Something like 117-118 db...