Coincident Frankenstein mk.2 amps

Hi 1markr, 
Congratulations on being a Frank owner. They are wonderful amps. Like you said they really sound big and powerful for an 8 watt amp, don't they.

IMS, The Mullard GZ37 weren't edgy at all.
They have the nicest midrange and if anything they are a little rolled off in the treble compared to my Tungsol 5u4gb and Sylvania 5931.

I also changed the coupling caps to Jupiter copper foil, so maybe the difference of opinion.

I really like the Takatsuki TA-300b tubes the best in the Franks, but they are very expensive.
 
Enjoy the amps they are excellent!

Joe

Well this just goes to show that people do hear things differently and outcomes can be system and people specific. I use the Mullard GZ 37 which replaced the stock RCA rectifier tube. The Mullard has been simply excellent in my opinion.

I have owned my Frankenstein MK II for 8 years and appreciate them more than ever. Superb amplifiers with appropriate speakers.
Charles

Hi Joe,
I'm curious,  how often do you switch between the Pass Labs  and Frankenstein driving your Hornings? I have no doubt that the sound quality of your system is fantastic and very natural. 
Charles 

Thanks for the feedback on the Mullard GZ37 guys... maybe I need to be patient with them, since the EMLs and the Mullards are relatively new with few hours on them, they have to "burn-in" properly.  Any thoughts on how many hours it may take them to reach their full sonic glory?

@snopro , I am a huge fan of the Jupiter caps, and have already used them in at least 4 or 5 of my previously / current owned gear. Trust me, it's on my mind now for the Franks! I want to get used to the Franks for now before putting in the caps, but yes, that is a goal!

1markr,
For further clarification I also have the Jupiter copper foil capacitors in my Frankenstein rather than the stock Solens capacitors in the first stage coupling cap position. The 2nd stage is interstage transformer coupled. The difference between the two capacitors isn’t "hugh" but is rather noticeable and a worthwhile upgrade in my opinion.

Regarding the Mullard GZ 37 I’d say that 40 to 50 hours was sufficient. However keep in mind that you may just like another tube more than you do the Mullard . This is all so subjective when all is said and done.
Charles