amb
Member of the Trade: AMB Laboratories
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A topology that keeps rail current constant isn't a difficult concept to grasp and I presented plenty of graphs to illustrate it. It has nothing to do with grounding practices.
Quote:
The 2-channel β18 is a single-PCB amp where the power supply, bulk caps and ground are all on a single board, connected to a large plane. Yes, it is physically different than the M³, but I've observed similar differences while experimenting with other circuits, and I do know a thing or two about proper grounding practices.
I didn't invent the 3-channel active ground topology. I have to give Morsel and Phil Larocco credit for that, who championed it in the PPA amplifier, as well as Larocco's commercial designs. Tangent also uses it in the Pimeta. I was convinced of its benefits after all the testing I've done.
If you're not convinced, that's fine by me. No one is forcing you to build a 3-channel amp, and β22 could be built in many configurations including the conventional 2-channel with passive ground.
Originally Posted by Koyaan I. Sqatsi /img/forum/go_quote.gif Yes, I read that yesterday. But I don't see that it has any particular benefits if proper grounding practices are exercised. |
A topology that keeps rail current constant isn't a difficult concept to grasp and I presented plenty of graphs to illustrate it. It has nothing to do with grounding practices.
Quote:
Though I didn't find the measurements terribly informative. Primarily because they were made using two physically different amplifiers. There's no way of knowing exactly what the ground scheme was in each amp (beyond just the issue of using an active ground or not) and grounding isn't the only thing which can contribute to crosstalk. |
The 2-channel β18 is a single-PCB amp where the power supply, bulk caps and ground are all on a single board, connected to a large plane. Yes, it is physically different than the M³, but I've observed similar differences while experimenting with other circuits, and I do know a thing or two about proper grounding practices.
I didn't invent the 3-channel active ground topology. I have to give Morsel and Phil Larocco credit for that, who championed it in the PPA amplifier, as well as Larocco's commercial designs. Tangent also uses it in the Pimeta. I was convinced of its benefits after all the testing I've done.
If you're not convinced, that's fine by me. No one is forcing you to build a 3-channel amp, and β22 could be built in many configurations including the conventional 2-channel with passive ground.