The RNHP is one of my favorite headphone amps regardless of price. As long as the headphones aren't hard to drive, I think I actually like it more than the $3,300 HeadAmp GS-X mk2 I used to own.

The stock power supply is okay...but the upgraded power supply sounds better enough that I only recommend this amp with it...especially if you upgrade the power cable. If you ever come across any negative impressions, it is most likely because they only used the stock power supply and didn't realize how much it can scale.

I am the original owner and purchased both in summer 2022. The condition is like new, as far as I can tell. All original packaging and accessories are included.

Price includes the PayPal fee and insured USPS Priority Mail shipping to the US. International shipping will cost extra.

I may be willing to sell the amp without the upgraded power supply, but probably only if I sell the latter first.

For more info:
https://rupertneve.com/products/rnhp
https://ifi-audio.com/products/ipower-elite/

The RNHP was declared as the best-sounding headphone amp (even compared to ones in the four figure range) here:
https://www.themasterswitch.com/best-headphone-amps