charles1 dad:
A fun tweak- experiment I have been trying since yesterday is putting a Synergistic Research HFT (High Frequency Transducer) on top of the rectifier tube in my 300SET amp. The change in the sound is not subtle and I think for the better. The amp has already been upgraded sonically with placing SR- ECT's (Electronic Circuit Transducers) on the chasis.
nmmusician - first posted this HFT tweak. I think it is a good one to try.
David Pritchard