Aristotele logical on Vinyl

[Stee]

inverting the same signal twice the result does not change

but

the low frequencies are in mono in the stereo system

then

they are complementary on the power supply

also inside equalizer

 

[bbftx]

This idea is indeed almost as old as Aristotle!

It's covered in A.J. van den Hul's FAQ on Phono Cartridges, question #162:
AJ van den Hul Phono Cartridge FAQ

Other forums have discussed this as well. Example from 2009:
AudioKarma Thread on Cartridges Wired OOP

Cheers,
B B

 

[billshurv]

IMO if that makes any audible improvement then you have a very suboptimal amplification chain.

 

[lcsaszar]

Genial idea! If I understand correctly, L pulls and R pushes the power supply at low frequency, this way the combined power is not fluctuating but constant.

But you don't need to tamper with the phono cartridge, this trick (phase inversion in one channel) can be done in the preamplifier.

 

[Stee]

yes of course

easy to do

 

[billshurv]

And still pointless unless you have a PoS amplifier.

 

[ralphfcooke]

And still pointless unless you have a PoS amplifier.

Not always the case if you are using higher power class D amplifiers with a single power supply, it significantly reduces 'pumping'

 

[Speedskater]

Not always the case if you are using higher power class D amplifiers with a single power supply, it significantly reduces 'pumping'

Highly doubtful with any reasonable amplifier design. But it would be easy to measure to test your theory.

 

[ralphfcooke]

Sorry, should have read 'Single ended' rather than 'single power supply'.

Have a look here for background data:-

https://www.maximintegrated.com/en/app-notes/index.mvp/id/4260

 

[MarcelvdG]

And still pointless unless you have a PoS amplifier.

That's the one thing I don't like about this forum: whenever someone comes with a clever idea to improve something, there is always someone nagging that it's useless because a stupider solution is good enough.

 

[billshurv]

Well Marcel, we will have to agree to disagree on the 'clever' part. For car audio I can see an application. For battery boom boxes I can see an application. For domestic audio I fail to see the benefit, which is probably why, despite it being around for a long time I am not aware of any application in home audio.



For anyone with an all digital rig of course it's very easy to test as you can invert one channel of your test music in your favourite editor then flip a speaker cable.

 

[dreamth]

Well Marcel, we will have to agree to disagree on the 'clever' part. For car audio I can see an application. For battery boom boxes I can see an application. For domestic audio I fail to see the benefit, which is probably why, despite it being around for a long time I am not aware of any application in home audio.



For anyone with an all digital rig of course it's very easy to test as you can invert one channel of your test music in your favourite editor then flip a speaker cable.

I think it's the opposite actually! Car audio usually use BTL outputs while home appliances are usually single ended...

 

[Speedskater]

Sorry, should have read 'Single ended' rather than 'single power supply'.
Have a look here for background data:-
...........................................

Now I understand what you are writing about. That's been a known problem for about a decade. But for the most part, it's restricted to low power or low budget Class 'D' amplifiers.

 

[billshurv]

I think it's the opposite actually! Car audio usually use BTL outputs while home appliances are usually single ended...

That's what I meant. BTL is exactly this application, but per channel rather than inverting one channel.