losing signal with cable length - normal?

Archived from groups: rec.audio.pro (More info?)

Hi!

I got a new (MESA/BOOGIE Formula) pre-amp that seems to be very sensitive to
signal levels. I didn't recover the problem described under using my
Marshall 6100 head.
The preamp/amp are built in to a rack with a Neutrik (NYS-SPP-L) patchbay. I
run my cable from my guitar to the patchbay which is sent to a VOX wah pedal
then back to the patchbay because I need to be able to choose which pree-amp
I plug into (I have 3 different pre-amps, using the Marshall as the power
amplifier).
The 2 cables going from and going into the patchbay seems to be the bad
point of this system. These are self-made from high quality Neutrik plugs
and Klotz cable (Pro Audio Instrument Cable Low Microphonics). Both cables
are about 2 metres. The solderings are OK.
If I plug directly into the pre-amp I get a much cleaner, hotter signal that
sounds punchier. If I go through the patchbay I lose some high end and some
punch.
How to overcome this problem? Where do I go wrong?
Thanks for your help!

bence

Archived from groups: rec.audio.pro (More info?)

Thanks a lot!

b.

"philicorda" <philicorda@localhost.com> az alábbiakat írta a következo
üzenetben newsan.2004.12.15.22.45.55.858511@localhost.com...
> On Tue, 14 Dec 2004 20:13:57 +0000, Locsmándi Bence wrote:
>
> > Hi!
> >
> > I got a new (MESA/BOOGIE Formula) pre-amp that seems to be very
sensitive to
> > signal levels. I didn't recover the problem described under using my
> > Marshall 6100 head.
> > The preamp/amp are built in to a rack with a Neutrik (NYS-SPP-L)
patchbay. I
> > run my cable from my guitar to the patchbay which is sent to a VOX wah
pedal
> > then back to the patchbay because I need to be able to choose which
pree-amp
> > I plug into (I have 3 different pre-amps, using the Marshall as the
power
> > amplifier).
> > The 2 cables going from and going into the patchbay seems to be the bad
> > point of this system. These are self-made from high quality Neutrik
plugs
> > and Klotz cable (Pro Audio Instrument Cable Low Microphonics). Both
cables
> > are about 2 metres. The solderings are OK.
> > If I plug directly into the pre-amp I get a much cleaner, hotter signal
that
> > sounds punchier. If I go through the patchbay I lose some high end and
some
> > punch.
> > How to overcome this problem? Where do I go wrong?
> > Thanks for your help!
>
> I would suspect the Wah pedal. Does it have a true bypass? If it does, it
> should still pass a signal when off, and the battery removed. The
> mesa head may be more sensitive to input impedance than the marshall.
>
> Also..
> The signal loss is more likely to be in the socket/plug connections than
> the cables. Giving the patchbay sockets a clean can't hurt.
>
> That's a balanced patchbay. Try connecting pins 2+3 (Shield and ring) on
> the sockets together for a better earth.
>
> Try plugging a lead from the amp input directly into the patchbay's guitar
> output and see if one less plug/socket connection makes any difference.
>
> >
> > bence
>