Nice assessment. What is your experience using the TA30 in single ended operation? A couple people are quoted as saying that it is killer with 6L6.. for 5 BIG watts.
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That's interesting about the 6L6. I've only tried the tubes I mentioned, so I'm nowhere near an "authority" on the TA30. In fact, right before I got my current tube selection dialed in (New Sensor/Svet EL34, GT 12AX7M , Mazda 12AU7 Chrome Plate) I was going to try out single ended operation, but now it's been sounding too good for me to get around to it.
Do you know if the 6L6 are biased to 700mV for SE like an EL34?
FYI the two amps are not "cousins" except for being ultralinear in operation like many other push-pull amps.
Especially when pushed due to Adaptive AutoBias and the output transformers. There is an article from the UK comparing the PrimaLuna with and without Adaptive Autobias installed that you may find suprising.
One man's tube he does not like today may be the one he loves when he changes speakers or goes from carpet to a hardwood floor.
Another tip from a industry guy that bought a ProLogue Two. He loves the SED 6L6GC. I haven't used them here, but he went bonkers and it's a cheap way to have a little fun.
Etanh ; Very nice descriptions .
I just switched (today)from a Cayin A-88T to a Prologue 2 . I was wondering if these descriptions would actually apply to the Prologue . From what I have been told , the Prologue uses different parts and assembly procedures as compared to the Cayin , although in the same factory . You described your Cayin as a 'busy bee' , does that mean that it has been modified ?
Does anyone happen to know the breakin time for the Prologue 2 ?
my apologies for implying any similarities between the two amps if no such similarity exists. I would hate to mislead your custormers, as I am one. Actually, I was led to believe that they are nearly identical except for the autobias circuit, faceplate and cap selection, so thank you for clarifying things. In any case, my main point was to just share my tube rolling experiences with others and gain knowledge in return, although I will again stress that my findings strictly relate to my particular amplifier and system.
as Upscale pointed out, our two amplifiers are not by any means identical aside from both being push-pull amps housed in a nearly identical chassis that can use an identical tube complement and share a similar power rating. It's highly doubtful that my exact experience with these particular tubes would be reproduced in your system, but it's possible that we may agree on a few general characteristics regarding their sound. And yes, "Bizzy Bee" does mean the amp has been modded.
Last week I ran the amp in single ended operation and didn't like it very much. In my system the highs became more pronounced while the low end dissipated a bit. The midrange was a tad warmer, although there was a general "smearing" and grittiness that was too much for me.
Also, I think the mazdas have broken in some more because I'm really loving the Mazda/GrooveTubes/NewSensor combo right now. Can't wait to do some room work this weekend.