The Lyr+ is actually supposed to arrive today.
Following plan: A90D vs. Lyr+ in a blind comparison.
The E50 DAC is connected to both amplifiers.
The amplifiers are connected to the x and y input and brought to the same volume.
(Play 1khz sine wave
Measure voltage including load (so parallel at the headphones), and measure the volume with a sound level meter.
Whereas it should actually be enough if I just take the sound level meter?!)
Then at the output from the trs switcher the headphones.
I will then ask a second person to plug the connectors coming from the 6.3mm outputs of the amplifiers, into the x and y inputs as they choose, and cover a certain area so I can't see where the cables are coming from.
I will then be able to switch back and forth between the amplifiers with an estimated millisecond interruption.
View attachment 257703
It would be exciting, of course, if I could hear a difference.
However, I don't expect to.
Any suggestions, or ideas for improvement?