Au-d607x decade amp works as it should. 0.003%THD 8 OHM AND 6 OHM speaker capability. Best sounding amp I've owned. Been stored for last 8+ years. I did a quick wipe down of the light dust layer obvious in the photos it could be better externally cleaned. The white marks on top are from the scotch tape I used to cover the vent holes with paper while stored. Call or message three six 0 801three five 13