Or if you want to keep your laterals you also can pay, one $ one piece......🙂
That's the price Mike R wanted and you have the same advantage..
Maybe better we PM this point.....
That's the price Mike R wanted and you have the same advantage..
Maybe better we PM this point.....
excuse me quoting myself....
one more point, one pair in the output stage, normally a bit bright, can also get darker by adding an xformer like Nelson did in M2 and his solution seems to keep the clearness and precision of one pair and add the tonal body by the xformer.....
that was the reason why I tried Magma.....
http://www.diyaudio.com/forums/pass-labs/188109-introducing-magma-front-end-ba-2-f4.html
🙂🙂
Thank you for the insight. A transformer like FE is in the works. I am going to finish the others first. THe OPA setup may have line trafos feeding it so we will see how that sounds.
Just had a thought. If running BA-3 in balanced configuration, doesn't P3 become obsolete except for achieving minimal distortion? Balanced by nature cancels 2nd harmonic.
wouldn't a pot between the two side serve to unbalance the output in the same way as P3 in the SE version or is this a completely erroneous thought.
Simple report. Kerofal beats mica and Artc Silver in thermal performance. I have one side using each, with mica being split to wafer thin pieces and using what is arguably the best thermal compound, Artic Silver. The mica side reads 39 on washer holding fet and 38 on heatrsink. Kerofal side reads 39 on washer holding fet and 40 on heatsink. i could be reading this wrong, but it would seem that the Kerofal is doing a better job transferring heat to heatsink. I will give complete writeup of setup and describe sound later. I will continue to do so until I have made final decisions.
So today I am getting the second BA output ready using Lateral mosfets 2sj162/2sk1058. I also will be setting up the Ba-3 FE so that I can switch between 3 different caps, Obbligato Film in Oil, Clarity Cap PCX, Solen Fast Cap. BBA3 will wait until i get the output stage decided. Last night i listened to the BA output with BA3 FE as well as my Borberly Jfet pre. I realized listening to just the Borberly pre with output stage, that I like the F4 better than the F5. Juma's F5 is wonderful. It is precise, dynamic, and extremely accurate, but I like the F4 more, because it seems softer and more musical. Perhaps this is because of my speakers, MA Alpair 7.3, which I would call accurate and analytical. The F4 seems kinder to lesser recorded music, but doesn't really give up much on quality recordings. I think the F5 beats it on imaging, but a lack of sharp imaging can sometimes give the impression of a more cohesive and present sound-stage. Words are not my repertoire, so i could be doing a disservice here. I am interested to hear the Laterals to see if it is true about the IRF fets being dark. It may turn out that I like this dark nature. We will see.
Hi buzz,
Happy to hear you like the F4 toooooooo!
All the words you wrote I wrote in a similar way two years ago, looking for more and more details can be contra ...... Music.
And I get more and more the impression that a like NFB devices more.... F4, F2, F1.
And the same is true for my pre experience.... Aleph P, BA-3.
I can hear this devices louder and longer without stress....
But at the first moment the FB devices win often......
And Sarajan from the 6moons wrote " the F4 is the most kiffed of the bunch...."
What do we want more?
( later he wrote something that the F4 sounds a bit unengaged and hollow, it's true too...., but do not say to others....)
Happy to hear you like the F4 toooooooo!
All the words you wrote I wrote in a similar way two years ago, looking for more and more details can be contra ...... Music.
And I get more and more the impression that a like NFB devices more.... F4, F2, F1.
And the same is true for my pre experience.... Aleph P, BA-3.
I can hear this devices louder and longer without stress....
But at the first moment the FB devices win often......
And Sarajan from the 6moons wrote " the F4 is the most kiffed of the bunch...."
What do we want more?
( later he wrote something that the F4 sounds a bit unengaged and hollow, it's true too...., but do not say to others....)
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yes Zen Mod, I forgot it in this moment speaking of kiffed, lovely, wonderful 😛😛😛F4😛😛😛😛😛😛😛
Do you think I exaggerate the meaning of NFB to the kind of sound we seem to like....😕
Could be.......🙄
Do you think I exaggerate the meaning of NFB to the kind of sound we seem to like....😕
Could be.......🙄
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F4 will transfer 95% of preamp's sound , and just 5% of it's own
are we forgetting that ?
No doubt, but I think with same pre running both F5 and F4, you do get an idea of what the F4 sounds like in comparison.
now we are forgetting one thing - preamp optimized for driving F4 isn't exactly optimized for running lesser demanding amps (speaking about gain )
I'm not saying that difference must be huge and must exist , but it always exist
point is - when comparing F4 with anything else , one must include info what's driving F4 , because preamp's influence in F4's sound is much greater than in case of pairing that same pre with amp with own voltage gain
my reason for insisting on that is sole one - to not misjudge F4 quality , when we are sometimes forgetting a fact of mixing apples and oranges
I'm not saying that difference must be huge and must exist , but it always exist
point is - when comparing F4 with anything else , one must include info what's driving F4 , because preamp's influence in F4's sound is much greater than in case of pairing that same pre with amp with own voltage gain
my reason for insisting on that is sole one - to not misjudge F4 quality , when we are sometimes forgetting a fact of mixing apples and oranges
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Pumpkin optimimized for F4 was perfect for this purpose. When I later build a clone with 20db amplifications Aleph P 1.7 was the easier to handle partner,
gain is here selectable by switches and a pot, and you can go down to very low values of amplification when you do not need them.
BA-3 is of course again a candidate for amps with no or lower gain.....🙂
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