Pondman,
If the originals are sovtech as I had in my arc I found a big improvement with amprex bugle boys and mullards both will give a warmer more natural tone. The mullard has a litle more treble extension. in my system(a little dark) I prefered the mullard.
If the originals are sovtech as I had in my arc I found a big improvement with amprex bugle boys and mullards both will give a warmer more natural tone. The mullard has a litle more treble extension. in my system(a little dark) I prefered the mullard.