[78-L] EQ - why bother? - was: stereo/mono and noise reduction

[David London]

I think it's best to combine the signals as near to the cartridge as
possible because even the cables have capacitance and inductance which will
alter the signal differently so it won't cancel as well when combined
later. I put jumper wires right on the cartridge clips.  If you combine the
signal after amplification it will be even worse, due to distortion in the
amplifier (and they all have SOME).

To alter a cart set up for vertical, to horizontal, just reverse the wires
on one channel only.   Also, I think a magnetic cart will work better than
an older piezo cart for this purpose.

My take on EQ is to use whatever sounds best.  I also use filters and tone
controls :).





On Tue, Nov 8, 2011 at 9:30 AM, <bradc944 at comcast.net> wrote:

> Actually, it was more a question of how to best achieve A+B, and I was
> looking for input & suggestions on that front...right now the method I am
> using is mixing-down to mono in CoolEdit (and should I be running
> double-Y-adapters in the audio chain between the external phono preamp and
> the receiver instead)... I do have a cartridge set up for verticals that
> will play back well in stereo mode... is there a cartridge wiring scheme
> that would effectively make a lateral-only device?
>
> The tuner thing came as an add-on in one of the early responses.
>
> And, yes, with audio reproduction equipment, you will get different
> 'flavorings' of EQ. It was not so much different from the days of acoustic
> reproduction (witch-hat cone v floor-standing Opera horn)... it's the stuff
> of which Stereophile writers dream and drool, I swear...
>
> Brad (ducking and covering for I know the barrage about Stereophile
> Magazine drivel will be imminent!)
>
> ----- Original Message -----
> From: David London <jusmee123 at gmail.com>
> To: 78-L Mail List <78-l at klickitat.78online.com>
> Sent: Mon, 07 Nov 2011 23:02:11 -0000 (UTC)
> Subject: Re: [78-L] EQ - why bother? - was: stereo/mono and noise reduction
>
> I believe it cancels noise because noise mostly creates a pulses in one
> channel of the pickup cartridge in one direction, and  equal and opposite
> pulses in the other channel.  When you connect left and right channels
> together, the electrical pulses cancel each other.
>
>
>
> On Tue, Nov 8, 2011 at 7:52 AM, Rodger Holtin  wrote:
>
> >
> >
> >
> >
> >
> > The original question was how and why does A+B mono work to cancel noise,
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