TNRabbit Posted May 21, 2010 Share Posted May 21, 2010 WHOA!~ check the current bid: $20+ [:|] Impressive by any standard. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=140406718441&ssPageName=STRK:MEBIDX:ITAUCTION DETAILS:This unit is in 100% mint condition. It is being sold from a collection of equipment that was not used. This unit is AS NEW.We have tested the amplifier for about 8 hours, and both pairs of headphone for approximately 4 hours each.The amplifier, and headphones are in immaculate condition, with no scratches, nicks, or scuffs.Each pair of headphones come in its original silk lined box. If you have any questions, feel free to contact me for more information, or photos.From the information I have been able to dig up, there were only 300 HEV-90s amplifiers produced.Here is some information on the Orpheus:The Holy Grail for every audiophile is the absolutely original reproduction of the music as it was played in the studio, which means that such things as treble or bass controls are frowned upon. An essential role is played by the microphones, as these are the first link in the recording chain and are therefore decisive for the quality of the sound reproduction. Headphones also have to meet very special demands in the audiophile world. With headphones, the sound acts directly on the auditory canal and not, as in the case of natural listening, on the whole head. What is more, as the ear lobes are “deactivated”, the natural spatial listening effect can only be achieved by highly sophisticated technical means. It was with the ambitious aim of producing no less than the best headphones in the world that Sennheiser’s experts began the development of their “Orpheus”. They finally presented their electrostatic headphones with a tube pre-amplifier in 1991 – and surpassed all expectations.Specifications for the Sennheiser Orpheus HEV-90 AmplifierFrequency response 10 - 20,000 Hz (- 0.25 dB) THD (1 kHz) Unweighted S/N ratio ≥ 80 dB Sensitivity/impedance 10 k? Technical Data Amplifier Talk-over muting (1 kHz) ≥ 80 dB Output voltage 400 Veff Line inputs (switchable) optical, digital (Toslink)co-axial, digital(RCA phono)(automatic recognitionof incoming sampling frequency)co-axial, analogue(RCA phono) Outputs for 2 HE 90 headphones Weight approx. 13 kg Dimensions 53 x 34 x 15.5 cmSpecifications for the Sennheiser Orpheus HE-90 HeadphonesFrequency response7-100,000 Hz (-10 dB)14-85,000 Hz (- 6 dB)25-75,000 Hz (- 3 dB) Frequency range diffuse field equalised Transducer principle electrostatic Ear coupling circumaural Contact pressure 4.6 N THD at SPL of 110 dB (94 dB) Nominal sensitivity (V = 100 V) ≥ 98 dB/1 kHz Polarisation voltage 500 V Weight (without cable) 365 g Connector 5-pin HV plug Connection cable 3 m, 6-coreOFC copper cable, gold-plated contacts Dimensions 19 x 10 x 21.5 cm Quote Link to comment Share on other sites More sharing options...
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