Any Modwright LS 36.5 or DM36.5 pre-amp owners here?
I have been using the DM36.5 two box pre-amp for the past few months and decided to try out some of the more esoteric tubes. For those not familiar with the design, the pre uses a pair of the 6H30’s and the dual mono power supply has 2x 5U4GB (rectifiers) and 6AE7’s (regulation).
Starting with the 6H30’s, the stock tubes are the Electro-Harmonix 6H30-Pi Gold. I exchanged these for a matched pair of the Reflektor 6H30-DR purchased from thetubestore.com (great service from Jon). Considering the near 10x price hike I had high hopes, and was not disappointed. The improvement is very impressive; improved bass, clarity, openness, dynamics, PRAT and punch.
Next is the 5U4GB’s, I have two different types to try here, a matched pair of Mullard GZ34 Metal Base, and Tung-Sol 5U4GB. This will all happen in the next few weeks if anyone is interested I will post my comments here.
Cheers,
Mark