Cartridge Loading for a phono pre amp

JC: " Tonearm cable inductance is typically dwarfed by the inductance of the cartridge signal coils (Lyra PhonoPipe cable inductance 0.75uH, Lyra Kleos coil inductance 9uH), so it makes no sense to reduce the cable inductance if the price to be paid is greater capacitance (which is usually what happens).

When authoring the documentation for our post-2009 cartridges, I went up as high as 600pF cable capacitance (to cover audiophiles who may keep their turntable in a separate room / closet). The official loading recommendations for the Delos, Kleos, Atlas, and Etna reflect this wide range of cable capacitances, and the inclusion of highly capacitive cables for special circumstances is why you may see loading values as low as 95 ohms suggested in our literature.

R.

@whistleraudio  aka @holmz  : I already made the " food " but you want that I " eat it " for you., no way.

You need to make your job.

 

R.

@whistleraudio  aka @holmz  : I already made the " food " but you want that I " eat it " for you., no way.

You need to make your job.

I asked about compliance as a function of loading.
You provided frequency response as a function of loading.

It is like wanting an omelet, and receiving a half boiled egg, and claiming that the/a meal has been prepared.

We should probably just let it go.

You let it go, to lazzy to read.

Dear friends and @judsauce : " You provided frequency response as a function of loading. "

Well , those charts that I posted ( and I deleted latter. ) was the main part of the J.Carr white papers and the foundation for his statement:

 

" To claim that the loading affects the measurable frequency response of the cartridge is bogus. "

 

With LOMC cartridges the changes in the sound " color " that happens when we change impedance loading comes and is developed by the phono stage it self not by the LOMC cartridge . As I said any one of us can change the loading impedance according what we like or is near our targets on each one room/system.

Hagermann made a calculator to know the frequency resonance of the cartridge coming from the MM cartridges and in his white papers when he speaks of LOMC cartridges he said: " that’s why normally 100 ohms is the manufacturer advise " ( something like that. ).

 

In the other side the main issue for we audiophiles is if impedance loading in a LOMC cartridge affects frequency cartridge response and the answer is: NO, it does not affects the cartridge frequency response.

 

The " golden boy " said everywhere/all audio forums to load LOMC cartridges at 47k and in one thread he posted that’s because is the standard value not in specific to MM/MI cartridges but for LOMC too ! ! ? ? ? Go figure !

 

In that thread an audiophile posted " 47K is the standard for MM. Not for MC. " and the " golden boy " gave and posted this answer:

" Actually 47K is the standard input impedance for all ....., MM or LOMC. "

 

Obviously is wrong.

 

When LOMC cartridges appeared at the same time the LOMC manufacturers designed/manufacture too SUT because there was not active high gain phono stages. So, all phono stages came with 47k where the SUT must be connected.

Latter on appeared the active high gain phono stages to drive LOMC in exclusive way with no facilities to handle MM/MI cartridges, even those LOMC phono stages cames ( even some today ) with impedance load different values choices coming from 100 ohms to 1k ( more or less. ) where no one came with the option to choose 47k. All these are facts not imagination as the " golden " boy ".

Problem with what he posted about is that the normal audiophile has low knowledge levels and tend to believe all those lies.

 

holmz the compliance issue developed by changes in load impedance already was answered in this thread. Obviously not important for a normal audiophile because does not affects neither the LOMC cartridge frequency response

 

R.