Originally Posted by
scott fitlin
The PS and Powerline series are basically the same. The PS was the pro variant, and the Power Line was Crowns attempt, in the `80,s at the consumer/home audio market.
I have them all, they are all good, the PS and Power Line series uses what Crown called Multi-Mode circuitry, which allowed the amps pre driver stage to run in Class A fir the first couple of watts, and then, as the amp gets pushed, it switches over to AB+B. I happen to like the Power Line series, and the PS series, I also happen to like the older and original D series, as in D-150A,s and DC-300,s and the D-75.
Since I`ve used them all, I do notice slight differences between the different series and generations of amps, but only slight, nothing major. If you use them properly, you should get great sound out of any of them. I particualrly like the highs using Crown Power Line 2,s mid 80,s, and I like a crown D-150A, white face circa 1978 or so for my mid horns. The slight differences in sound are due to the circuit refinements and possibly the newer generation of output transistors. And there are some who say the older D series was the Best Crown ever made.