The Pass Amp Camp amps do not provide anywhere near the power those greedy LS 50s demand. What about the new amp with the KEFs?
Good point. Maybe the Pass Lab ACA mini amp wasn’t doing the Kef’s any favours?
The Fluance SX6s are more sensitive and easier to drive than the LS50s and might be a better match.
In any case it looks as though the Z4 is up to the job of powering either pair.
From their website:
Now there’s a Z4 version of the GT-102. It’s specially configured for speakers with impedance of 4 Ohms and below. We guarantee that it will deliver 50 Watts per channel into 4 Ohm loads. It typically delivers more than 60 Watts per channel into 4 Ohm loads. It will even drive a 2.7 Ohm load without complaint. If you have low impedance speakers, we recommend that you buy/build the Z4 version of the GT-102.