Stax
SR-009S
Introduced 2018$4,545 MSRP
Stax's flagship electrostatic earspeaker with gold-plated MLER-2 electrodes; requires a 580V pro-bias energizer. A benchmark for transparency and speed.
MSRP
$4,545
Used market · Excellent
$2,800est.
-38% vs MSRP
as of Aug 15, 2026MSRP to used market
From $4,545 at launch to $2,800 today (estimated).
Specifications
- Type
- electrostatic
- Driver
- push-pull electrostatic, MLER-2 electrodes (580V pro bias)
- Weight
- 441 g
- Impedance
- 145,000 Ω
- Sensitivity
- 101 dB
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