Ayre QB-9 Twenty upgrade

[AB835]

MY QB-9 DSD is in transit to Ayre for the 20 Upgrade, scheduled for Sept 3. Will report when it returns.

[AB835]

I know it arrived but has not returned as of yet.

[AB835]

Mine came back about 2 weeks ago and has been in use since it arrived, no issues at all. Sunday I connected my QB-9 20 to one of the Balanced inputs of my Kx-5 20 and connected  my  QB-9 DSD to another balanced input. All I had to do id move the usb connector from one to the other to compare between them, everything else in stream is identical. The upgraded QB-9 20 was well worth the upgrade and as others said it is fantastic, I could not be more pleased with the upgrade..

[AB835]

jma2

I am 99% sure both the REGEN and ISO REGEN generate its own clean 5v for usb output.

[AB835]

CG

I have had issues with my ISO REGEN  connected to my QX-5 20 as you described earlier, original USB REGEN functions normally. I installed a simple on/off switch in the power line providing power to the ISO REGEN. Normally power to the ISO REGEN is always on. If there is a problem I cycle the power off and back on to the ISO REGEN and it then works fine till the next time. What is so weird is that I have not had any issues with either REGEN when connected to my QB-9 20!

[AB835]

I have just completed connecting my QB9 DSD 20 and my QX-5 20 (as a DAC only) to my KX-5 20 preamp so I can compare them in my main system by only switching the preamp inputs. I will report back next weekend.