580V bias MK2 Pro SRD7 (Best Version!) It’s Fully functional and in very good condition. I ship worldwide, no problem. Happy listening and God bless :)

580V bias MK2 Pro SRD7 It’s Fully functional and in very good condition. I ship worldwide, no problem. Happy listening and God bless :)

This is the best version 580V bias MK2 Pro SRD7 Not the 230V normal bias Not the inferior sounding SB Version It’s Fully functional and in very good condition. this version is getting even more rare. It’s build ahead of its time back when speaker amps had audible noise floor and were not so good. So they quickly stopped producing them and this item became obsolete. But with the recent exponential technological improvements in speaker amps, this 580V SRD7 transformer is now more relevant than ever. Traditional electrostatic direct drive dedicated amps even the best DIY ones, have not evolved in many decades and will be surely stuck there because the research into high voltage semi-conductors, the most essential part of those amps, stopped after the death of the CRT TV market. If you already have a great modern speaker amp this is the no brainer and future proof option to drive your electrostatic headphones with almost endless headroom even for the most demanding headphones. I ship worldwide. Happy bidding and God bless :)

This is the best version 580V bias MK2 Pro SRD7 Not the 230V normal bias Not the inferior sounding SB Version It’s Fully functional and in very good condition. this version is getting even more rare. It’s build ahead of its time back when speaker amps had audible noise floor and were not so good. So they quickly stopped producing them and this item became obsolete. But with the recent exponential technological improvements in speaker amps, this 580V SRD7 transformer is now more relevant than ever. Traditional electrostatic direct drive dedicated amps even the best DIY ones, have not evolved in many decades and will be surely stuck there because the research into high voltage semi-conductors, the most essential part of those amps, stopped after the death of the CRT TV market. If you already have a great modern speaker amp this is the no brainer and future proof option to drive your electrostatic headphones with almost endless headroom even for the most demanding headphones. I ship worldwide. Happy bidding and God bless :)

This is the best version 580V bias MK2 Pro SRD7 Not the 230V normal bias Not the inferior sounding SB Version It’s Fully functional and in very good condition. this version is getting even more rare. It’s build ahead of its time back when speaker amps had audible noise floor and were not so good. So they quickly stopped producing them and this item became obsolete. But with the recent exponential technological improvements in speaker amps, this 580V SRD7 transformer is now more relevant than ever. Traditional electrostatic direct drive dedicated amps even the best DIY ones, have not evolved in many decades and will be surely stuck there because the research into high voltage semi-conductors, the most essential part of those amps, stopped after the death of the CRT TV market. If you already have a great modern speaker amp this is the no brainer and future proof option to drive your electrostatic headphones with almost endless headroom even for the most demanding headphones. I ship worldwide. Happy bidding and God bless :)

Fully functional and in very good condition Best and rare version SRD-7 580-Volts PRO MK2, this version is getting rare as hens teeth. Stax build this ahead of its time back when speaker amps had audible noise floor and were not so good. So they quickly stopped producing them and this item became obsolete. But with the recent exponential technological improvements in speaker amps, this 580V SRD7 transformer is now more relevant than ever. If you have a modern Speaker amp (low voltage/High current amplifier) this is absolutely the best way to enjoy your electrostatic headphones and it only gets better as speaker amp Innovation goes on. Traditional electrostatic direct drive dedicated amps even the best DIY ones have essentially not evolved in many decades and will be surely stuck there because the research into high voltage semi-conductors, the most essential part of those amps, completely stopped after the death of the CRT TV market. If you already have great speaker amps this is the no brainer and future proof option to drive your electrostatic headphones with almost endless headroom even for the most demanding headphones. I ship worldwide. Happy bidding and God bless :)

Fully functional and in very good condition Best and rare version SRD-7 580-Volts PRO MK2, this version is getting rare as hens teeth. Stax build this ahead of its time back when speaker amps had audible noise floor and were not so good. So they quickly stopped producing them and this item became obsolete. But with the recent exponential technological improvements in speaker amps, this 580V SRD7 transformer is now more relevant than ever. If you have a modern Speaker amp (low voltage/High current amplifier) this is absolutely the best way to enjoy your electrostatic headphones and it only gets better as speaker amp Innovation goes on. Traditional electrostatic direct drive dedicated amps even the best DIY ones have essentially not evolved in many decades and will be surely stuck there because the research into high voltage semi-conductors, the most essential part of those amps, completely stopped after the death of the CRT TV market. If you already have great speaker amps this is the no brainer and future proof option to drive your electrostatic headphones with almost endless headroom even for the most demanding headphones. I ship worldwide. Happy bidding and God bless :)

This STAX SRD-7 SB MK2 Pro Energizer with dedicated 580V Bias (The best version of all) /Rare: is fully working and in great condition (see photos) with original packaging included. Build ahead of its time (No longer produced), this device is without doubt now quickly becoming the best solution to drive electrostatic headphones especially as amps technology is getting better and better with time surpassing all dedicated Stax and diy designs which are almost not evolving with time, this energiser is the future proof device of them all, to use with ever improving modern Amps. This Original 580V bias version (the best one) has both standard bias and pro bias outputs and is getting rare as hens teeth. Happy listening and God bless! :)

Der Kopfhörer SR84 Lamba Junior verwendet ein Elektret- elektrostatisches Wandler-System. Der hochpolymere Film, der für die Membranen verwendet wird, ist dünner als 1/100 der Dicke des menschlichen Trommelfells. Diese ultradünne und leichte Membran wird rein durch elektrostatische Kraft angetrieben, wodurch im gesamten Audiospektrum keinerlei Transienten-, Phasen- und Intermodulationsverzerrung entstehen. Spezifikationen SR80 Hörer:Frequenzbereich 24 - 25ooo HzImpedanz 150 kOhm bei 10oooHzSchallpegel 95dB /100V effMax. Schallpegel 110 dBOhrpolster weiches KunstlederGewicht : 230g (160 g ohne Kabel) Spezifikationen SRD-4 Versorgungsteil:Frequenzbereich 10 - 30ooo Hz +/-2,5dBKlirrfaktor 0,002% / 1kHz /1WBelastbarkeit 5 W sin. 1kHz 30WSpitzeAbmessungen BxHxT 90x66x194 mmGewicht 0,860 kg Achtung: der SRD-4 Versorgungsteil ist nicht für Vollelektrostaten geeignet. Es wird hier keine Polarisationsspannung erzeugt.

STAX SRD-7 MK2Adaptator for earspeakerPRO ONLY 580VBONNE CONDITION / GOOD CONDITIONDes traces d’usage apparaissent, mais peu, voir mes photosTraces of use appear, but few, please see my photosSallume, mais non testéSwitches on, but untestedPRO ONLY MODE and NORMAL MODEPrise de courant Suisse / Swiss power plug240VLIVRAISON / DELIVERYEn emballage protégé / Safe packagingItalians and Spanishes Islands, please contact for shipping cost.ADC - AKG - AUDIO-TECHNICA - DENON - DYNAVOX - EMPIRE - GARRARD - JELCO - LENCO - MICRO SEIKI - ORTOFON - PICKERING - REGA - SHURE - SME - STANTON - THORENS 3A - AUDAX - B&W - BOSE - CABASSE - CELESTION - CERWIN WEGA - DITTON - ELIPSON - FRANCE ACOUSTIQUE - HRC - INFINITY - JAMO - JBL - JENSEN - JM REYNAUD - KEF - KLIPSCH - LANSING - LEAK - LES - MAGNAT - MARTIN - MERCURIALE - MISSION -ROGERS - SIARE - TAD (PIONEER) - TANNOY - TRIANGLE - ULTRALINEAR - WHARFEDALE 3M - AGFA - AMPEX - BASF - FUJI - MAXELL - MEMOREX - NAGRA - NAKAMICHI - SCOTCH - SONY - TANDBERG - TDKA&R CAMBRIDGE - ACCUPHASE - AIWA - AKAI - ALPINE/ALPAGE - AMSTRAD - ARCAM - AUDIO RESEARCH - AUREX (TOSHIBA) - BANG & OLUFSEN (B&O) - BARTHE - BENYTONE - BLAUPUNKT - BOSE - BRANDT - BRAUN - BRYSTON - BST - CAMBRIDGE AUDIO - CARVER - CONTINENTAL EDISON - CREEK - CYBERNET - DAVID HAFLER - DENON - DUAL - DYNACO - ELECTROCOMPANIET - EMB - ESART - FERGUSON - FISHER - GRAETZ - GRUNDIG - H.H.SCOTT - HARMAN/KARDON - HITACHI - ITT - JEFF ROWLAND - JVC - KENWOOD - KRELL - LINN - LOEWE - LUXMAN - MARK LEVINSON - McINTOSH - MERIDIAN - MICROMEGA - MITSUBISHI - NAD - NAIM - NAKAMICHI - NEC - NIKKO - NYTECH - ONKYO - OPTONICA (SHARP) - PALLADIUM - PANASONIC - PATHE MARCONI - PHASE LINEAR - PHILIPS - PHONOPHONE - PIONEER - RADIOLA - REVOX - ROTEL - SABA - SAE - SAMSUNG - SANSUI - SANYO - SHARP - SCHAUB-LORENZ - SCHNEIDER - SCIENTELEC - SETTON - SHERWOOD - SIEMENS - SONY - SOUNDCRAFTSMEN - STAX - STUDER (REVOX) - SUGDEN - SYMPHONIE - TASCAM (TEAC) - TEAC - TECHNICS - TELEFUNKEN - TELETON - TENSAI (AKAI) - THOMSON - THRESHOLD - TOSHIBA - UHER - UNIVERSUM - WALTHAM - WEGA - YAMAHA