Hi Jim,

My system is a Pro-ject Debut III connected to a NAD PP2 phonostage
which in turn is connected o a Maranrtz 6500 OSE Integrated Amplifier.
I am using JBL S312 floor standing speakers.

Do you think there could be something wrong with the NAD or the
turntable?

Cheers

MB

In article . com, max
graff wrote:
Hi Jim,

My system is a Pro-ject Debut III connected to a NAD PP2 phonostage
which in turn is connected o a Maranrtz 6500 OSE Integrated Amplifier. I
am using JBL S312 floor standing speakers.

Do you think there could be something wrong with the NAD or the
turntable?

Afraid I am not sure.

To clarify: When you said the problem shows when stop and start the TT, you
are leaving the NAD phonostage switched on throughout? i.e. the problem
can't be due to the NAD being powered on/off?

The symptom you describe is one I associate with something like a preamp
which has a single power rail. When switched on/off this may cause a
'thump' as the dc levels change and settle. This isn't something I'd
normally expect when a TT is switched on/off as all that normally does is
cause the TT to begin or cease rotation.

Other sources of 'thumps and waggles' for the speakers might be when you
lift or lower the stylus and it makes/breaks contact with the record
surface, or if the record/deck have a lot of rumble. But these don't seem
to fit with the behaviour you describe - unless you are including
lifting/lowering the stylus as part of 'start and stop the TT'...

I know that some TTs do include pre-amps, from what you say, that isn't the
case in your system.

At present I can only say that there does seem to be an odd problem, but it
isn't clear to me what the cause may be. Perhaps someone else will
recognise it.

Slainte,

Jim

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