Sony SE-P900

The most elusive ESPRIT unit but arguably, undisputedly, the best analog parametric EQ ever produced - by anyone.

Absolutely transparent, the SE-P900 does its job without ruining the basics of the signal it is fed with :

”The initial stage is a junction FET cascode connection differential amp with constant current source. It reduces the high range distortion resulting from non-linearity in the FET feedback capacity, because of the high input impedance and the cascode connection. The FET uses a dual cascode connection with excellent pair response to suppress temperature drift.

The second stage is a Miller current loaded differential amp composed of bipolar transistors, which provides high linearity response and power rejection response.

The final stage is a pure complementary emitter-follower SEPP output which provides low impedance output and high linearity response.
The buffer unit circuit allows 100% NF, and is employed as gain 1 (during DEFEAT in the equalizer stage) so there is almost no deterioration in sound quality.


Unlike the TA-N900 monoblocks or the abundant TA-D900 4-way filter, the SE-P900 is unfortunately extremely rare, even more than the TA-E900 ESPRIT preamplifier - good things are never common.