Re: Explain the advantages of PTP amps

On Nov 6, 8:53 am, "Dr. Zontar" <drzon...@xxxxxxxxx> wrote:
Other than ruggedness and ease of repair, what advantages does point-
to-point wiring have in an amp?

I hear a lot of people say it SOUNDS better. How do electrons
traveling through a wire sound any better than electrons traveling
through a circuit board? Since circuit boards are laid out to get
components as close together as possible, with as little wasted space
as possible, it seems that they have a potential to sound better,
since the signal has to travel less distance between parts.

Or is it just a case of "Leo Fender did it that way, so that's how it
should be done"?

Anyone?

- Rich

I can say...from experience that there *is* a difference. It will
depend on one thing, and that is board layout. I have built the same
preamp circuit (3 stage, JCM-ish but tweeked to be hotter/smoother) in
countless amps as well as ground up p-t-p builds and it sounds
different in every application given the same supply V. The closest to
p-t-p would be the JCM/JMP/plexi RI. That style layout is minimalist
and traces are spaced so stray capacitance is not an issue.

As an example, for a customer I built that circuit into a Peavey TG
Raxx rack mt preamp using the existing pcb and making only minor
changes to the layout via cut traces/jumpers. Circuitry not needed was
eliminated. It worked fine, but had a dark quality to it I didn't care
for.
FF about 2 months...same custy brings me another TG Raxx preamp and
says gut it and lets do this one PTP wired. So I cut the pcb leaving
only the pwr supply section and do the build on eyelet board. Night
and day difference. Drastic contrast in clarity, especially when set
to run fairly clean. The PTP one had a high end sparkle the pcb
version just couldn't duplicate.
So that's my take on it.
Last I talked to him, he was using both of them...one for the darker
sound when that was the goal.

.

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