Stax
Driver de fone de ouvido eletrostático STAX SRM-270S
The STAX SRM-270S is a dedicated electrostatic headphone driver unit, serving as the core amplifier for high-fidelity audio systems, particularly when paired with STAX SR-X1 headphones. This desktop unit focuses heavily on thermal management, utilizing a 3mm aluminum front panel and a larger aluminum extrusion chassis to maintain optimal operating temperatures. For superior clarity, it incorporates a low-noise FET in the first stage and a refined emitter follower circuit in the output stage. Its compact chassis design ensures easy placement on any desk, making high-end electrostatic performance accessible.
$445.00
Owner Satisfaction
4.3
/ 5
Category Rank
696
/ 732
#696 in Headphone Amplifiers
Price vs Category Average
-68%
Below average
Frequency Response
3500003
/ DC to , Hz/+, - dB
Who it's for
- Exceptional Transparency and Detail
- Accessible Entry to Electrostatics
- Compact and Desktop-Friendly Design
Who should skip it
- Limited Driving Power (Headroom)
- Single RCA Input Only
- Functional, Non-Premium Build Quality
Key Specs
Frequency Response
DC to 35,000 Hz/+0, -3 dB
Input Impedance
25kΩ
Amplification Gain
58dB (800 times)
Maximum Output Voltage
280 V rms/1 kHz
Dimensions
132(L)×38(A)×153(P)mm (excluding protrusions)
Weight
540g
Bias Voltage
580 V DC
Material
3mm thick aluminum front panel and aluminum extrusion chassis
Features
- Enhanced heat dissipation via aluminum chassis.
- Low-noise FET for superior audio clarity.
- Refined emitter follower output stage.
- Compact desktop design for easy placement.
- Designed specifically for STAX SR-X1 headphones.
- High-quality RCA connectivity.
- Excellent thermal management capabilities.
What customers say
The SRM-270S is widely recognized as the essential entry point into the STAX electrostatic experience. Customers consistently praise its ability to deliver the signature STAX sound—exceptional speed, transparency, and micro detail—at an accessible price. Its compact design is perfect for desktop use. Many users note a significant improvement in clarity and soundstage depth compared to dynamic headphones. While it serves as a fantastic starter energizer, experienced listeners observe it lacks the ultimate dynamic punch of higher tier models. Despite a minor critique regarding its external power supply, the consensus confirms it is a clean, reliable driving source that effectively showcases the unique capabilities of STAX earspeakers.
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