Of course. That is fine if you are a passive consumer. This is DIYaudio, and while for some the only reason to do DIY is to get something they can't buy readymade (because of price or other reasons), for many DIY is a way to learn more about audio - and audio (the accurate reproduction of recorded sound) is based on technology (applied science), not just subjective perceptions and beliefs.
or perception of reproduced sound...
I guess you mean "High Fidelity" for the accurate reproduction of recorded sound, with parameters like band width, distortion, S/N ratio.
Well, it is perfectly possible to do High Fidelity tube amplification
It is perfectly possible to do High Fidelity solid state amplification
So what??
But maybe it's like this:
You have the "perfect" low level amp with a wonderful sound - distorsion and all... now, you would like exactly that but on a high level/power output.... then of course it makes sense to choose the absolutely most transparent power amp so not to add or retract whatsoever from the source signal.
Yepp - that works... it's stil very strange...
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You have the "perfect" low level amp with a wonderful sound - distorsion and all... now, you would like exactly that but on a high level/power output.... then of course it makes sense to choose the absolutely most transparent power amp so not to add or retract whatsoever from the source signal.
Yepp - that works... it's stil very strange...
//
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Well, it is perfectly possible to do High Fidelity tube amplification
It is perfectly possible to do High Fidelity solid state amplification
It is perfectly possible to do "High Fidelity" with both (after all, DIN45500, the definition of "HiFi", is pretty lax), but it is way easier with solid state.
I assume you know that the nutube was specifically designed as an effects device (to provide distortion and coloration).
Well...
There is already a company making a Purifi amp fronted by a NuTube inout section. They also publish the specs for all to see. I believe it is Audiophonics.
Personally, I would suggest that a different tube front end would be more appropriate if one was really looking for tube/class D hybrid type amplifier. The Nature appears hopelessly compromised for use with the Purifi modules.
There is already a company making a Purifi amp fronted by a NuTube inout section. They also publish the specs for all to see. I believe it is Audiophonics.
Personally, I would suggest that a different tube front end would be more appropriate if one was really looking for tube/class D hybrid type amplifier. The Nature appears hopelessly compromised for use with the Purifi modules.
My Amp
My Purifif amp uses the Eval board for the input stage and sounds great-mostly it just sounds like whatever DAC i pair it with.
I like to tinker though, and am considering replacing the OPA 1612 with the discrete Sonic Imagery 994s. These discrete OPAs appear to match the specs of the 1612, except for current availability, which is way higher. I am actually a believer in having much more current available than "needed", and feel this often results in sonic improvements, maybe I'll try it. I would probably also provide +/- 18 VDC rails for the 994s directly from my +/- 18 VDC supply in the amp.
My Purifif amp uses the Eval board for the input stage and sounds great-mostly it just sounds like whatever DAC i pair it with.
I like to tinker though, and am considering replacing the OPA 1612 with the discrete Sonic Imagery 994s. These discrete OPAs appear to match the specs of the 1612, except for current availability, which is way higher. I am actually a believer in having much more current available than "needed", and feel this often results in sonic improvements, maybe I'll try it. I would probably also provide +/- 18 VDC rails for the 994s directly from my +/- 18 VDC supply in the amp.
No I did not know.
Why would you introduce distortion/coloration on purpose?
Anyway, it has nothing to do with proper tube circuitry.
Tube front ends almost by definition are pure class A.
Most off-the-shelve op amps work in class B when I am right.
Discrete op amps with higher currents should have an advantage; input impedances of Ncore and Purifi power stages are lowish, and you want to have your front end to work in class A.
Most off-the-shelve op amps work in class B when I am right.
Discrete op amps with higher currents should have an advantage; input impedances of Ncore and Purifi power stages are lowish, and you want to have your front end to work in class A.
Operating classes really only apply to power amps, but opamps can be biased to work in class A or A/B - they pretty much never work in pure class B.
Yes...
Exactly why I want to try the SI 994. In this implementation it will run in class A, i am pretty sure, exclusively. The 1612 in the Eval board, and running on only +/- 12 VDC rails, is running right at its limits of voltage swing at higher levels, the 994 at +/- 18 VDC will just be cruising along in class A.
Exactly why I want to try the SI 994. In this implementation it will run in class A, i am pretty sure, exclusively. The 1612 in the Eval board, and running on only +/- 12 VDC rails, is running right at its limits of voltage swing at higher levels, the 994 at +/- 18 VDC will just be cruising along in class A.
I just bought...
A 12AX7 tube preamp for my bass. Improved my tone really nicely. Maybe I'll actually play this thing enough to make some music at some point!
A 12AX7 tube preamp for my bass. Improved my tone really nicely. Maybe I'll actually play this thing enough to make some music at some point!
Are we discussing guitar amps or "hifi" amps?
I was simply responding to your "Why would you introduce distortion/coloration on purpose?". The nutube was developed exactly for that - to add distortion and coloration on purpose, for musical instrument effects.
With the particularity that it can work with a very low voltage (+ 12V at 30V), with low consumption and little heat, being able to use the auxiliary voltage of the SMPS1200 power supply.
The idea was given to me by a friend of mine who has a 100W Jadis tube amp. A whole heavy and huge "thermal power plant". He asked me if I could make a powerful, light, cold and small tube amp. It may create controversy, but there is that option.
The idea was given to me by a friend of mine who has a 100W Jadis tube amp. A whole heavy and huge "thermal power plant". He asked me if I could make a powerful, light, cold and small tube amp. It may create controversy, but there is that option.
