whats the best amp for klipsch lascala 2?

Mcphile, the Klipsch really do prefer an amplifier with a high impedance output, if you want detail, smoothness, extension and impact all at the same time. Tubes are usually the answer for this.

If you just can't handle that, try putting a high power 4-5 ohm resistor in series with the transistor amplifier. That will simulate a high output impedance. A fair amount of power will be absorbed by the resistor, but you should find that the speaker is sounding better otherwise.

Mosfet amps have worked best for me with classic Klipsh.
Luxman M4000A was the best but imposible to find anymore.

CJ also offers mosfets; I tried one long ago but was unaware I had some other problems with setup so I didn't keep it. Might be worth trying again.

There are many others; Perreaux for example, mega powerful, a little cold though. McCormack DNA's work quite well. Ayre V3 is really good. Belles was not. Some Macs are mosfet. Nothing else like a Big Mac!

I settled on a big Accuphase P450 which I am very satisfied. The K's are high efficiency; rated at 100 w/ch but they work better with around 200 w/ch due to headroom.

I tried some various tube equipment but couldn't stand the rushing-noises, microphonics, heat. Others love them, though I never understood why?

Hello,
I have a pair of 1977-78 Klipsch La Scala's and currently using them with a pair of McIntosh mc40 mono blocks.

I've had many vintage Klipsch speakers especially back in the 90's and nothing has sounded so awesome other then the McIntosh mc40 amps.

The detail, sweetness, dynamics and sound stage is absolutely stunning.

I honestly believe I have a great combination....really incredible sound.

Tubes and minimal wattage is one way to go.....hopefully you can audition a vintage McIntosh mauditions

Thanks audio lovers !!!

Alnico, you certainly dug deep-- back 6 years ago. I think you are right re McIntosh, but really low wattage never gets the woofer moving. Without the power the sound is all midrange from that huge squawker.

Back in their day , Mac and Klipsch were a classic pairing .