I turned on my G68 today to play a CD thru the G91. Quickly heard a hiss through the speakers that turned to a 747 landing in my loft in about 10 seconds. Turned off and then back on and tried playing cable box input with the same result. Repeated a few times over the night with same results. [censored].

The G68 passes through a BAT tube pre-amp into ATC active front and rears (not sure if the rears also had hiss). I played turntable through the BAT pre without a problem. Hence, the problem seems to be in the G68. Unless the input on the BAT that the G68 passess through has a problem, but seems unlikely.

I have already replaced the power supply in G91 once, so first concern in power supply in the G68 (the only good Meridian power supply is no power supply).

Thoughts anyone.

G68, G91, BAT 51se tube pre, ATC SCM50 tower (active) fronts, ATC SCM20a rear, Oppo, Apple TV, Sonos, Nottingham TT, Shunyata power condition and cords.