The TeraDak is actually the OEM supplier for the NOS Valab. If your reading this ad you are probably familiar with this NOS dac. I purchased this to modify but with all big plans sometimes you get side tracked and things never get started or completed, in my case I am happy with the sound in stock form. All I have done is add the outboard power supply which necessitates removal of the internal power supply, as you can see in the picture this opens up a lot of space to modify if you choose to go that route. I have also lightly tacked (temporary) some Obliggato bypass caps onto the legs of the output caps. The Dac sounds great as is and operates without issue and is in very good condition, 8/10. I will absorb Paypal fees, buyer pays for shipping and insurance. Check my perfect feedback at AGON under "phill". Selling for $199.00 plus shipping.