Shaq,
I agree with Johnny R from Audioconnection. I owned the Ref 150, dropped in KT-150s and noticed a big improvement and then had ARC do the SE upgrade and noticed another big jump in performance.
I know many members have made some fine recommendations, but IMO, you can squeeze a lot more performance out of your Ref 150 by doing the SE upgrade, which includes a complete retube.
BIF
I agree with Johnny R from Audioconnection. I owned the Ref 150, dropped in KT-150s and noticed a big improvement and then had ARC do the SE upgrade and noticed another big jump in performance.
I know many members have made some fine recommendations, but IMO, you can squeeze a lot more performance out of your Ref 150 by doing the SE upgrade, which includes a complete retube.
BIF