Stax SRM-500T Electrostatic Headphone Amplifier

STAX custom-made low-noise DUAL FET is used for the first stage, and high-voltage double triode 6FQ7 / 6CG7 is used for the output stage. While following the traditional circuit design which is perfect for  STAX vacuum tube drivers, we have improved the efficiency of the power supply and  further improved the sound quality.

In addition to the conventional power transformer for the high voltage circuit, the newly designed power transformer with the winding for the low voltage circuit is installed in SRM-500T. By adopting this low-voltage winding, the efficiency of the power supply has improved, and compared to conventional vacuum tube driver units such as the SRM-006tS, power saving and improved sound quality have been achieved.

Technical Specifications:

• Type: FET + vacuum tube output hybrid DC amplifier configuration / driver unit
• Vacuum tube : 6FQ7 / 6CG7
• Frequency response: DC to 90kHz (when using one SR-L500 MK2)
• Gain: 60dB
• Harmonic distortion rate: 0.01% or less (at 1kHz / 100V r.m.s. output)
• Input impedance: 50kΩ (RCA), 50kΩ x 2 (XLR)
• Maximum output voltage: 300V RMS (1kHz)
• Bias voltage: DC 580V
• Operating ambient temperature / humidity: 0 to 35 ° C / 90% or less (however, no condensation)
• Input: RCA x 1 XLR x 1
• Output: RCA out
• Power consumption: 38W
• Dimensions: 195W x 102H x 376Dmm (including protrusions such as knobs)
• Weight: 3.4kg
• Country of origin: Japan

We endeavour to despatch same day for orders placed up to 1pm on available stock items (items with stock message "Usually dispatched within 24 hours"). Please remember to check with us first for a physical stock check if next day delivery is important to you. Any items with stock message "Usually dispatched within 72 hours" are items that we do not hold in stock but order in from the importer or manufacturer as soon as a customer order is received. Occasionally these may be delayed beyond 72 hours due to importer/manufacturer stock levels but we will inform you as soon as we can if this is the case.

UK Orders

We despatch the bulk of our UK mainland items on a 24 hour service – Free of Charge.  Non Mainland locations - Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer and are not Free of Charge. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as DPD or UPS.

International Orders:

Due to the nature of our products and brand restrictions we are only able to send certain items internationally. Smaller items are delivered using Royal Mail Small Packets Airmail with International Tracked and/or Signed depending on value of item and availability of the service. Larger International shipments are sent by insured and tracked services using UPS. If there are any delays due to specific customs regulations, etc, you will be contacted by Hifisound or by the courier with a request for any further information required. Customs duties can apply for shipments to any countries outside of the UK depending on where the product you have bought is made. Customers are responsible for all taxes and duties incurred when the items enter their country.

Collect in Store or Home Install

At the request of the manufacturer some items cannot be supplied by mail order but you can click and buy them and then elect to collect them from our store or arrange a home install (if applicable). Applicable items clearly state that they are Collect in store or home install. Once ordered you will receive a message prompting you to contact us by phone or email to arrange for us to deliver and install or to reserve and collect from our store at your convenience, you will also be advised of the delivery time / stock availability as not all Home install / collect in store items are held in stock.