Has anyone built or heard the pre-amp designed by David Broadhurst? http://www.geocities.com/d_broadhurst/preamp.html
How does it compare to the Aleph P1.7? The theories are very different. I wonder if anyone has had a chance to audition both for results?
From my search, it looks like this pre-amp was discussed at one point, but the discussion didn't show up in my search. Do old posts disappear?
Thanks.
brad
How does it compare to the Aleph P1.7? The theories are very different. I wonder if anyone has had a chance to audition both for results?
From my search, it looks like this pre-amp was discussed at one point, but the discussion didn't show up in my search. Do old posts disappear?
Thanks.
brad
The theories are not different at all. He has cascoded
and current sourced the Zen Balanced Line Stage aka
BSOZ.
The current sourcing and cascode are the next logical
progressions of complexity, and they work fine.
and current sourced the Zen Balanced Line Stage aka
BSOZ.
The current sourcing and cascode are the next logical
progressions of complexity, and they work fine.
dc said:
It is nothing but a current-sourced differential-amplifier driving a cascoded common gate-stage. 😎
I did also note a HUGE quisent current 😀
Best regards\Morello🙂 🙂 🙂 🙂 😎 😎
Thanks for the replies. When I said different in theory, I meant that Pass designs are known for their simplicity, while Mr. Broadhurst points out in his description that his pre-amplifier is an intentional move away from simplicity - as he states in the opening paragraph of his description: "It attempts to move away from the extreme simplicity of similar designs improving all areas of performance." I was simply looking for listening impressions as to whether the increased complexity improves the sound, as well as 'all areas of performance.' I understand that this is subjective, but I'm new to the game, and, as such, haven't developed preferences of my own, yet. I guess the only way I'll know which I like better is to build both circuits and then decide for myself. I was hoping others' opinions might guide me in choosing which unit to build first.
I don't think you'll easily find a consensus on this question.
I have seen opinions go both ways.
I have seen opinions go both ways.
Mr. Pass is correct. I asked many times which one sounds better and never received clear answer.😉
I belive that one could design a preamp with much lower distortion by designing a discrete OP-amp and apply some regulative /negative feedback.😎
Best regards\Mr. LOOPGAIN Morello😀
Best regards\Mr. LOOPGAIN Morello😀
The broadhurst design is very very close to my cascoded BoSoZ design posted here. I think it sounds terrific. The distortion measures much lower than standard BoSoZ.
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