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STAX SRM-500T Electrostatic Headphone Amplifier with silver metal casing and control knobs on white background
  • STAX SRM-500T Electrostatic Headphone Amplifier with silver metal casing and control knobs on white background
  • Rear view of STAX SRM-500T Electrostatic Headphone Amplifier showing input and output connectors on white background
  • Top-down view of the open STAX SRM-500T Electrostatic Headphone Amplifier showing internal circuit board and vacuum tubes
STAX SRM-500T Electrostatic Headphone Amplifier

STAX SRM-500T Electrostatic Headphone Amplifier

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STAX is proud to introduce the SRM-500T, successor of the SRM-006tS. The SRM-500T utilizes a pair of 6FQ7/6CG7 vacuum tubes on the output driven by a custom-made noise noise dual FET. This updated design offers improved power efficiency allowing for better sound quality over the conventional vacuum tube output driver unit featured in the SRM-006tS. STAX prides itself in pricing this new electrostatic driver at a great value while still offering the best possible performance!

Features

• FET Input + vacuum tube output hybrid DC amplification

• Newly Designed Vacuum Tube Output Stage

• Custom-Made Low Noise Dual FETs

• Pair of 6FQ7/6CG7 pre-installed Vacuum Tubes

• Pair of RCA input terminals

• Pair of XLR 3-pin input terminals

• RCA parallel output terminals

Technical Specs

Frequency Response
DC - 90kHZ (with one SR-L500 MK2)

Vacuum Tube
6FQ7/6CG7

Harmonic Distortion:
0.01% or less (1kHZ/100Vrms output)

Input Impedance
50k Ohms (RCA) 50k Ohms x2 (XLR)

Maximum output voltage
300Vrms (1kHz)

Bias Voltage
DC 580V

Operating temperature / humidity
32 to 95 degrees fahrenheit @ no more than 90% humidity (non condensing)

Power Consumption
38W

Dimensions
(H)4.0" x (W)7.68" x (L)14.8" (maximum protruding portion included)

Weight
7.5 lbs

Close-up of the STAX SRM-500T Electrostatic Headphone Amplifier’s electronic circuit board with colorful wires, multiple resistors, and two glass vacuum tubes, surrounded by various components typical of STAX audio products.

Overall rating: 5.0 / 5 from 4 reviews.

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Reviews

STAX SRM-500T Electrostatic Headphone Amp

"The STAX SRM-500T is usually regarded for its transparent sound, impeccable build quality, and ability to drive electrostatic headphones with finesse This amp boasts a spacious soundstage and precise imaging. Overall, it's worth considering if you're serious about high-fidelity audio reproduction, delivering a clean, detailed sound that faithfully reproduces the nuances of your music. Its design ensures low distortion and a very good transient response, resulting in an engaging listening experience. The performance and craftsmanship justify the investment for audio enthusiasts."

— Anton M. (5/5)

Excellent Headphone Amp

"I am happy I purchased this amp. It delivers. I’ve been a STAX fan forever and finally upgraded to the tube version. Love it!"

— Joshua M. (5/5)

Perfect Partner for Stax SR-L500 MK2

"Amp powers my Stax SR-L500 MK2 headphones in a musically satisfying manner. Full, clear sound. No listening fatigue. Excellent build quality, amp is silent with no hum or rattling physically as it operates. Everything works and feels good as I expect from things made in Japan. The volume control has a good amount of travel before music gets too loud. Bargain at the retail price. A design classic!"

— Torris J. (5/5)

Addictive sound

"Very nice synergy with a pair of L700MK2, makes them sound full and easy to listen to. The energizer barely gets warm for a tube unit. Things sound organic and natural, vocals and acoustic guitars have a life like timbre that's addictive to listen to. I hear no tube distortion, the sound is very smooth yet detailed and clean from this hybrid design. I can tell the unit was designed with the L300,L500,L700 stax in mind. The L700MK2 sounds complete and enjoyable with the 500T, I'm now having a hard time returning to my harbeth speakers."

— Saul (5/5)

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