Sony SE-P900

April
1 9 8 1 april 1981
1 9 8 6 1986

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.

Sony SE-P900, image 1 Sony SE-P900, image 2
Sony SE-P900 specifications
Title Value
Peaking : LOW 30Hz...600Hz
MID 200Hz...5,3Khz
HIGH 800Hz...15Khz
Bandwidth : 0,15...1 octave
Level : ±12dB
Shelving : LOW 30Hz...600Hz
HIGH 800Hz...15Khz
(frequency point at 3dB from the level set)
Level : ±12dB
Circuit : Variable state filter
2-stage differential amp + SEPP output
Inputs : Line In / Tape In (150mV / 50kOhm)
Outputs : Line Out / Rec Out (150mV / 100 Ohm)
Max. input level : 7V
THD : less than 0,01% at rated output
Output Gain : 0/-10/-20dB
Frequency response : 5Hz...100Khz (+0/-3dB, controls on defeat position)
SN ratio : more than 84dB (150mV input, closed circuit, IHF-A)
more than 100dB (1V input, closed circuit, IHF-A)
PC : 11W
Multivoltage : no (US version)
yes (AEP & UK versions)
Dimensions : 48 x 8 x 40cm (with optional rack handles)
Weight : 8,1kg.
List price : 200,000¥ (1983)
Sony SE-P900 : 1 topic
(last updated topic shows up first)
  • SE-P900                             (9)last updated by stchedro - 24/08/2011, 11H27
page online since : august 2005
page updated : not yet
page type : LGT / KNB
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