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SDS, Supra, MPX tuberolling, the new global, improved thread - Page 48

post #706 of 780
Quote:
Originally Posted by ldj325 View Post
the high power option so that output tubes can be either 300 or 400 volts.
I'm not sure if this would be appropriate for your new amp, but my MPX3 SE has a single voltage setting at 350V (one of a handful built this way, Mikhail told me). I'm not sure if you'll be able to use the Extreme tubes in your creation, but if not maybe going for a single voltage setting would help your costs a bit and then you could definitely afford the 12V option, something I think would be great to have.

I owned two other MPX3 SE amps, both with the voltage switch. IMHO, this one sounded the best, especially with the 6BL7GT and 2c51. I'm not sure if using the older 6BL7GT is advised with the 400V option, but it definitely sounds much better at 350V... it didn't take much time to discern this, as the 6BL7GT sounds darker and slower at 400V and really opened up at the 350V setting.

Maybe you need a 300,350,400 selector knob
post #707 of 780
The 6BL7GT can hadle up to 500V on the plate so yes running it at the higher votlage is fine. That said, as you have found (and I agree), the sound is just too thick and slow at the higher voltage.
post #708 of 780
Quote:
Originally Posted by PFKMan23 View Post
The 6BL7GT can hadle up to 500V on the plate so yes running it at the higher votlage is fine. That said, as you have found (and I agree), the sound is just too thick and slow at the higher voltage.
yup, it was rather obvious when comparing the amps. Then once I added the 2c51 to the 6BL7GT, it was like magic. I'm using the WE 396A now, although the tube is starting to wear out, so I'm thinking about picking up something exotic for replacement (ideas?)

Anyways, back to the story at hand... I talked with Mikhail on the phone after that and turns out this was the first combination he recommended for my amp... he definitely knows how to tune his amplifiers.

Moral? Trust your (and Mikhail's) ears
post #709 of 780
Quote:
Originally Posted by luvdunhill View Post
yup, it was rather obvious when comparing the amps. Then once I added the 2c51 to the 6BL7GT, it was like magic. I'm using the WE 396A now, although the tube is starting to wear out, so I'm thinking about picking up something exotic for replacement (ideas?)

Anyways, back to the story at hand... I talked with Mikhail on the phone after that and turns out this was the first combination he recommended for my amp... he definitely knows how to tune his amplifiers.

Moral? Trust your (and Mikhail's) ears
From what I have read it seems like the 6BL7GTA are the tubes to get (which I'll see about with my amp). If I recall these handle the 400 volt just fine. Is your suggestion so that I can divert the money from the High Power Output option (essentially having only one voltage at 350) to go towards the driver 12 volt option?

Would the 350 setting adversely effect other output or input tube options?

I had a PM from another owner with the 12 volt option and he was saying he doesn't use the option that much as he doesn't care for the 6snf (family) as a driver and that the 12 volt option is mainly to use the cheaper 12 volt versions of the 6sn7. This struck me because I am generally preferring the Sylvania 5965 in the ECC1 adapter as my driver tube over the Zenith 6sn7 in my Extreme Platinum. At the same time Earl, in another thread of mine on this same topic gave other reasons (tube options) for having the 12 volt option. Sorting between all the options sure gets tricky.

Regarding this statement: " Maybe you need a 300,350,400 selector knob " --yeah I'll get that as soon as I can afford a 7-8K amp. But these days it's strictly cash and carry for me, so such a maxxed out amp is out of the question.
post #710 of 780
Quote:
Originally Posted by ldj325 View Post
From what I have read it seems like the 6BL7GTA are the tubes to get (which I'll see about with my amp). If I recall these handle the 400 volt just fine. Is your suggestion so that I can divert the money from the High Power Output option (essentially having only one voltage at 350) to go towards the driver 12 volt option?

Would the 350 setting adversely effect other output or input tube options?

I had a PM from another owner with the 12 volt option and he was saying he doesn't use the option that much as he doesn't care for the 6snf (family) as a driver and that the 12 volt option is mainly to use the cheaper 12 volt versions of the 6sn7. This struck me because I am generally preferring the Sylvania 5965 in the ECC1 adapter as my driver tube over the Zenith 6sn7 in my Extreme Platinum. At the same time Earl, in another thread of mine on this same topic gave other reasons (tube options) for having the 12 volt option. Sorting between all the options sure gets tricky.

Regarding this statement: " Maybe you need a 300,350,400 selector knob " --yeah I'll get that as soon as I can afford a 7-8K amp. But these days it's strictly cash and carry for me, so such a maxxed out amp is out of the question.
I like the 12av7 series as well as any INPUT tubes I have tried. The 2c51 is also very good; but the 12av7 series gives you so many more choices. I dont use the 12sn7 much anymore but I still like runing any of the tubes at 12 volts, as opposed to 6 volts, when I can.

The 6bl7gta/6bx7gt sound better with more voltage gain than most of the lower gain tubes like the 6/12sn7 can provide. I feel the same way about the 6sa7g/6080. The 6as7's like more voltage gain too.
post #711 of 780
I posted in another thread I started on the 12 volt option a few more details: http://www.head-fi.org/forums/showthread.php?t=251762 on my decision to order the 12 volt option for my new Supra XLR. I thank everyone for their input on this decision (and I think most of you have been on that thread as well).

What I want to mention here for other future Singlepower tube rollers is that the 12 volt option can be configurred to apply to the input tubes alone or to input and output tubes at the same time. While I have not heard this tube combination, I wanted to pass on a recommendation by Mikhail. He said that running the 12 volts on all three positions with 12sn7s yielded a very natural flowing sound that he was very nice especially with the Senn 650s.
post #712 of 780
Quote:
Originally Posted by luvdunhill View Post
yup, it was rather obvious when comparing the amps. Then once I added the 2c51 to the 6BL7GT, it was like magic. I'm using the WE 396A now, although the tube is starting to wear out, so I'm thinking about picking up something exotic for replacement (ideas?)
Try a Bendix 6385 with the 6BL7GTA's. The 5670 was OK, the Tung Sol 2c51 better, and the WE 396A worked excellent. But the 6385 has a little bit more soundstage and quite a bit better detail in a MPX3 as a preamp.
post #713 of 780
Has anyone tried the "All Hytron" set on Supra? It is excellent for electronic music. Very clean, very fast. Try it if possible. Hytron gives all the detail you would hope for.

post #714 of 780






I need to take some proper pictures and post some beauty shots of Satan' Delicious Sound, but I am too busy trying to figure out tube combinations that I like best. It is truly mind-boggling what this amp and PS offer in terms of tube-rolling and I have barely scratched the surface. With pretty much any voltage possible -- in varying increments of the available regulator tubes -- I can run all sorts of input and output tube combinations. So far, I have tried 2c51, 5965, 6414, and 6SN7 drivers, and still have various 12XX7 tubes to try in those spots. I have only used the 6BL7GTs that Mikhail supplied, but he just hand delivered 5687s with adapters and I have various 6SN7s to try out. The rectifiers make quite a bit of difference as well, and I have 5U4s, 5R4s (of various types), GZ34s, 6606s and probably others.

Woosh. I get woozy thinking of all the possibilities. If anyone has suggestions for combinations they think would sing in this beast, I am all ears. TIA.
post #715 of 780
I love the 2c51/5670 driving 6bl7gta's. But, that is with SS rectification. I would still give that combo a try.
post #716 of 780
Quote:
Originally Posted by sacd lover View Post
I love the 2c51/5670 driving 6bl7gta's. But, that is with SS rectification. I would still give that combo a try.
Thanks Earl. That is the combo that I had in the amp yesterday because Mikhail brought over the 2c51s and adapters. Sounds great. Really open but with a lot of body adn depth to the sound. I have Tung Sol, Bendix and maybe one other branded pair.
post #717 of 780
Voltrons,
Great looking amp!! Congratulations. You should pick up a pair of R10s for your amp.
post #718 of 780
Quote:
Originally Posted by purk View Post
Voltrons,
Great looking amp!! Congratulations. You should pick up a pair of R10s for your amp.
Thanks Purk! I just might have to borrow some R10s to find out how they sound with the beast. I assume it will be a great match with the right tube complement, but I wouldn't want to go and spend even more money on audio on them without being sure that they were "necessary* to enjoy the amp to the fullest.
post #719 of 780
Quote:
Thanks Purk! I just might have to borrow some R10s to find out how they sound with the beast. I assume it will be a great match with the right tube complement, but I wouldn't want to go and spend even more money on audio on them without being sure that they were "necessary* to enjoy the amp to the fullest.
__________________
I believe every SDS-XLR deserve an R10. If I can bring out a near HE90+HEV90 performance from my R10 with the upgrade SDS-SE, your amp should elevate the R10 even higher. I have an excellent result with the 6BL7s + GE 12AY7 for both versions of R10. I manage to get some serious bass with this amp while retain all the goodness of the R10 with this amp. You should check it out.
post #720 of 780
WOW

what a glow !!!
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