Stax SR-507 - Overview
Stax SR-507 is current top of the (Lambda framed based) line headphones. Stax SR-507 are based on SR-404 and feature a few technical improvements such as new style arc assembly, new diaphragm material, 6N OFC silver plated cables, real leather ear pads, and driver "packaged in resin case". The coating of the diaphragm and plastic used for housing might have changed, as well the tension of the diaphragm itself. Production and distribution starts on September 1, 2010.
General Description of the Sound
No information as of this time.
Pricing & Other Data of Interest
Street price seems to be anywhere from $700-$900 depending on the vendor and exchange rate, or ¥66K to ¥80K in Japan.
Type: push-pull electrostatic, oval sound element, open-air back type enclosure (case)
Frequency response: 7 - 41,000 Hz
Electrostatic capacitance: 110pF (including attached cable)
Impedance: 145kΩ (including attached cable, at 10kHz)
Sound pressure sensitivity: 100dB / input 100Vr.m.s. / 1kHz
Maximum sound pressure level: 118dB / 400Hz
Bias voltage: 580V DC (standard)
Right/left channel indication: 'L' and 'R' indicated on the arc assembly (inside head spring), solid line (left) and dotted line (right) on cable
Ear pad: genuine leather (skin-touching portion), high-class artificial leather (circumference portion:)
Code: parallel 6-strand, 2.5m full length, low-capacity special wide cable, 6N(99.9999%) OFC with silver plating
Weight : 472g (including attached code), 295g (without cable)
SR-507 should be used with a driver unit equipped with 5-pin PRO bias terminals.
There are 12 Stax headphones based on the Lambda frame:
- SR-Λ PRO
- SR-Λ Signature
- SR-Λ Nova Signature
- SR-Λ Nova Classic
- SR-Λ Nova Basic
- SR-Λ Spirit
- Airbow SC-1 - modified SR-404
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