STAX SR-009S Headphones - As New and Complete - In Box

General:Like new in box showing no signs of use whatsoever. Just about a $1k savings over a sealed box set. Might be the most comfortable ear-speaker I have ever tried. They weigh absolutely nothing and will knock your socks off with regards to dynamics and imaging. Will come complete like the day it left the factory. More from STAX:SR-009S adopts a diaphragm made of ultra-thin super engineering plastic film. The light mass has realized a high transient characteristic throughout the entire audio spectrum. The main body was redesigned to further reduce resonance as to provide a consistent sound.ENCLOSURE:Aluminum is a metal good for sound and suitable material for audio equipment. It is abundantly used, e.g. at the frame supporting the appearance and sound element, to realize high-quality sound, rigidity and lightweight. Almost every part of the SR-009 is manufactured through precise machine processing. CABLE:The high-purity copper developed from the necessity of wiring large-scale integration circuits is also known as high-quality audio cables. High-purity copper wire of 99.9999% (6Nines) purity adopted for the cable is further silver-coated and finished with the most suitable structure to drive the earspeaker.EARPAD:The earpad of a new design is carefully made by a craftsman's hand and features both the real leather with good humidity environment and the cushion material with moderate elasticity.The new earpad enables hours of comfortable listening to music.ARC (head band):The arc is equipped with a position adjustment mechanism of 10-step slider and corresponds to the wide range of cranial form with individual difference. Multilayer fixed electrode MLER (Multi-Layer-Elect-Rords) established with SR-009 has evolved to MLER 2. The finish and etching process that smoothes the edge of the electrode opening reduces air resistance and further improves sound permeability. Also, the electrodes themselves are gold plated with high specific gravity to minimize the resonance of the ultra-thin electrode. At the same time, due to the effect of reducing the electric resistance of the electrode itself by gold plating, we have opened up a new ground for high speed, clarity, silky details, and powerful texture. Brand Background:Stax has been making the worlds best electrostatic headphones since 1959 Ownership:Single OwnerAmplifier Recommendations:As little as 10 watts will make these singGeneral Sound:Accurate to the recordingCosmetic Condition:9/10 = Excellent. Perfect physical condition, gently used.. See our detailed rating description here.Working Condition:Working perfectly and tested in our lab.Included:Exactly as pictured and described above.Packing:Original Manufacturers PackingReviews:Click HereOriginal MSRP:$4,545Specs:Push-Pull Open Back Circular Electrostatic HeadphoneFrequency Response:5 - 42,000 HzElectrostatic Capacitance:110 pF (including cable)Impedance:145k Ω (including cable, at 10kHz)Sound Pressure Sensitivity:101 dB / 100V r.m.s. 1 kHzMaximum Sound Pressure:118 dB / 400HzBias Voltage:580V DCLeft & Right Identification:"L" and "R" indicated on the arc assembly (inside head spring) Left channel cable is marked with a solid Line. Right channel is marked with a dotted Line.Ear Pads:Genuine Lamb Leather (direct skin contact), high-quality synthetic leather (surrounding portion)Cable:Silver-coated 6N (99.9999%) OFC parallel 6-strand, low-capacity special wide cable, 2.5m full length Approximate Age:2021 Testing Process: We start with a visual inspection of drive units to ensure they are intact, the pads are supple and compliant and the headband is operative. We then check the cable for any broken wires, stressed connecting points or jacks. We then do a listening test to make sure all frequencies, specially the bass is free from distortion, rattles of signs of a compromised transducer. We do a full frequency sweep and check for bass response and high frequency reach. The unit is the cleaned, cord is properly coiled and supplement any connectors or adapters that should be present.