Class A 30 Watt Amps: Are they enough to drive my book shelfs?


Currently looking at buying a Pass Labs XA 30.5 to drive my Kef 201/2 speakers which are rated at 86 DB sensitivity.  Is this a bad move?
puffbojie

Showing 3 responses by georgehifi

Does anyone have any idea of how this amp might sound at medium volume levels in comparison to a Modwright KWA 150

Never heard one, but should be ok grunt wise to handle the low loading between 70hz and 150hz for the bass, all depends on the rest of the design to how it's going to sound in the mids and highs.

Cheers george 
I have the 30.8 and I would be shocked if the 30.5 couldn’t completely drive the heck out of those KEF’s.
Yes but the amp will be pushed close to it’s limit to "drive the heck out of them", and no amp I know sounds it’s best when near it’s limit.
Like I said the 30.5 will be enough, but if you want to go big, then you will hear the strain when compared to say the 60.5

Cheers George


"Just" enough if you don’t want to party, the 60.5 would be ideal but they are monoblocks and much more expensive.

If the Kefs were a 4ohm load and less then the 30.5 would be giving out around 60w
  
But if you have a look at the impedance graph the Kefs average more like 6-8ohm, then the 30.5 is a little under powered.
https://www.stereophile.com/images/archivesart/708KEFfig1.jpg

Cheers George