Is Nelson's pre as good as his amp ?


Just wonder is it worth to replace my arc ls-3 with aleph p ? This wonder is based on very satisfied experience with aleph amp (first 5 then 2). OTOH, one stereophile's reviewer seemed to prefer AI M-3. Any thought ?
cdma
The Aleph amps prefer a balanced input signal. The Aleph P is a great preamp that mates well with the amp series.
>The Aleph amps prefer a balanced input signal

What? These are the original single-ended solid state designs. As I recall, the Aleph 3 doesn't even accept a balanced input.
Drubin you are correct about the Aleph 3, it only has RCA inputs, but all the others are fully balanced designs and for maximum performance they require a balance input signal. If you doubt me, contact Pass and see what they say.
The Aleph 2 manual says that there is no penalty in audio quality for using the RCA inputs.
The Aleph 2 Owner's Manual says: "For the lowest possible operating noise in any environment, the amplifier is equipped with balancd inputs featuring a common mode noise rejection of greater than 60db". I basically can't find the place in manual mentioning about no penalty of using unbalanced (RCA) against balanced. However, I did see "There is no penalty for not using this plug with unbalanced oeration". "No penalty" here I think is something about using or not using the plug for RCA to switch in between 26 dB and 20 dB gains.