Hey all, unfortunately I'm trying to consolidate my headphone gear a bit, and am deciding to let go of these amazing headphones. The SR1as are some of the most resolving headphones (ear speakers) I've ever heard. The HSA-1b is also one of the most versatile amplifiers. It has RCA single-ended and/or XLR balanced inputs and can drive SR1as via the ribbon driver port, external speakers via the rear binding posts, and conventional headphones via the balanced 4 pin or single-ended quarter inch jack. Overall, just a fantastic setup in terms of detail and resolution.

Everything is in great condition. Kit comes with:

1. HSA 1B Amp (discrete stepper volume knob)
2. SR-1a headphones
3. Stock cable SR1a
4. RAAL reference studio silver 4-pin adapter cable (to drive non ribbon headphones)
5. ZMF Pilot Comfort Pad - lambskin, never used
6. Professional waterproof travel case

I'm looking for $4000 shipped, please pm with any questions or any other offers! I'm more of a lurker on headfi, a bit more active on reddit: https://www.reddit.com/user/ryuan92, where I have more trades in r/AVExchange. Feel free to message me there as well.

Timestamp + pictures: https://imgur.com/a/iEI5g3S