Ray Samuels Audio P-51 Portable Headphone Amplifier

This is the Ray Samuels Audio P-51 Mustang High Resolution Portable Headphone Amp. It does not have DAC functionality.

I purchased it from Ray Samuels Audio* in 2008, used it for a while, and then stored it for a long period.
I requested red front and rear panels when ordering, and it was assembled that way. It is small and lightweight (under 70g).
* https://www.raysamuelsaudio.com/products/p-51.html

【Please Note】
- According to the included instruction manual, this unit has a built-in lithium-ion battery. I charged it using the included AC adapter for this listing and confirmed that it produces sound. However, as it is an older product, I believe the battery may have degraded.
- Please check the photos for the exterior condition. There are no major scratches, but there may be scuffs and discoloration due to use and age.
- The volume and toggle switch appear to operate without issue, but please understand that this has not been measured.
- P-51 is handwritten on the AC adapter. Please also acknowledge this.

Included in this listing are the amplifier unit, AC adapter, red cloth pouch, semi-transparent rubber feet, instruction manual, and outer box.
Unfortunately, returns cannot be accepted.

We kindly ask for your consideration after understanding the above. We are not considering price reductions at this time.