Hi all
I am sorry to say I do not know the answer to the question on the tweeters! Yesterday I took a risk and switched to phono (The arm is the standard rega with an Ortofon MC 16 super cartridge and a passive Audio Innovations phono pre amp). I played my vinyl copy of Keith Jarrett My Song Mmmmmm. I had forgotten how good that was.
The phono is still working but the selector knob now feels like it is about to fall off. I have tried an Allen key but cannot get it to move.
It is beginning to look like I either forget phono, get it repaired or upgrade to a new transistor amp.
regards
Dave