Doing some tube rolling this evening on the DIY Aegis, listening with the Audio-Technica ATH-AWKG (ZMF universe hybrid solid pads).
For output tubes, I replaced the Mullard EL37 and rolled a pair of Gold Lion KT77 (made in England,1979).
For rectifier, I replaced the GZ34 black base (Sittard) with a GZ34 metal base.
Input tubes remain a pair of Tung-Sol 6SU7GTY.
I'm not sure whether this is more due to the output tubes or rectifier change (haven't made the effort yet to isolate that), but the overall result is an extra sense of space, a hint of reverb that echoes in space and makes for a notably more spacious and holographic soundstage. Bass is also a touh more lush (or, at least, so I imagine).
This effect is notable with vocal tracks. Some of those I've listened to over the past hour..
For output tubes, I replaced the Mullard EL37 and rolled a pair of Gold Lion KT77 (made in England,1979).
For rectifier, I replaced the GZ34 black base (Sittard) with a GZ34 metal base.
Input tubes remain a pair of Tung-Sol 6SU7GTY.

I'm not sure whether this is more due to the output tubes or rectifier change (haven't made the effort yet to isolate that), but the overall result is an extra sense of space, a hint of reverb that echoes in space and makes for a notably more spacious and holographic soundstage. Bass is also a touh more lush (or, at least, so I imagine).
This effect is notable with vocal tracks. Some of those I've listened to over the past hour..




