I'm the original owner and used this as a DAC/Preamp in 2-channel system. I upgraded to a dedicated DAC and hence selling this.
As you might already know OPPO has discontinued it and making this a collectible item. Here is an opportunity to own a part of OPPO legacy
Asking Price $OLD OBO Here is the link to Specs
https://oppodigital.com/headphone-amplifier-ha-1/
