DescriptionWe have 100% stock & Ready to ship!!All accessories are as pictured.- Manufacturer: STAXModel number: SRM-1/MK-2Model: Driver unitFrequency characteristics: 5Hz to 20kHz +0 within -4dB (30V, when using one SR-? unit)Amplification: 60dBHarmonic distortion: 0.05% (1kHz, 100V, when using 1 SR-? unit)Input impedance: 50k?Input level: 100mVMaximum output voltage: 410V (1kHz)Bias voltage: 230VOperating temperature range: within 0 to 40°CPower supply voltage: AC100V 50Hz/60HzPower consumption: 35WDimensions: Width 150x Height 87x Depth 370mmWeight: 2.0kgSerial number: B2293?condition?The power can be turned on, and the sound output can be confirmed by connecting headphones on hand.Although it has been aged, there were relatively few scratches and dirt.Please check the condition with the photo and video.PaymentVarious credit cards, Apple pay, Google Pay etc.ShippingWe ship by DHL or Fedex. It will be shipped within 1 business day and will arrive in about 3 days on average.Arriving Time is around 3-7 days to arrive.We are fastest delivery seller in Japan.Free Shipping Worldwide!Terms of SaleMoney back guarantee within 60 days if returned by customer.International Buyers - Please Note:Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying.We have 100% stock & Ready to ship!!All accessories are as pictured.- Manufacturer: STAXModel number: SRM-1/MK-2Model: Driver unitFrequency characteristics: 5Hz to 20kHz +0 within -4dB (30V, when using one SR-? unit)Amplification: 60dBHarmonic distortion: 0.05% (1kHz, 100V, when using 1 SR-? unit)Input impedance: 50k?Input level: 100mVMaximum output voltage: 410V (1kHz)Bias voltage: 230VOperating temperature range: within 0 to 40°CPower supply voltage: AC100V 50Hz/60HzPower consumption: 35WDimensions: Width 150x Height 87x Depth 370mmWeight: 2.0kgSerial number: B2293?condition?The power can be turned on, and the sound output can be confirmed by connecting headphones on hand.Although it has been aged, there were relatively few scratches and dirt.

STAX SRM-1/MK2. Electrolytic power supply capacitors just replaced with appropriate larger value, long life, high temp versions. Settings calibrated. Should be good for at least another decade. If not refreshed as this is, these are all now old enough that the original wet capacitors will be needing replacement.Its had the Pro Bias portion of the main board populated to expand its use for high bias Stax earphones. These came in a few versions with the same board that simply needs to be populated for what is preferred. This one has been updated to do both standard (6 pin) and Pro (5 pin) bias. Easily removeable tape with PRO added to show that socket with the center hole plugged to prevent standard bias 6 pin bias phones into the 5 pin pro socket. Wouldnt damage them unless played quite loud but all sound better with the correct bias. Very good overall and excellent condition for its age. See pics. Careful of foreign sourced units without the mutli voltage tap in the back. 100v units do not run to spec in North America.