Cartridge Loading for a phono pre amp

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.

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

Yeah… Ralph fed me a while ago.

Hence I have no idea why you are still on me about being fed.
I am sated,

@rauliruegas  Apparently you've yet to sort out that I've never stated that loading affects frequency response of LOMC cartridges. Please cease and desist from claiming otherwise.

47K is the standard loading value for all cartridges, which is why phono preamps have a 47K input impedance. The reason many LOMC cartridge manufacturers might state a lower value (like 100 Ohms) is that they have no idea how competent the phono section will be to which their cartridge will be connected. Obviously it won't sound right if its sensitive to RFI from the cartridge and the loading detunes that resonant peak to which JCarr, Jim Hagerman and I have referred. So a nominal value of 100 Ohms is specified since there are so many phono sections that do have problems in this regard.

"

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. "

 

 

Stating that someone is stupid, when he is clearly not, indicates the accuser has lost. Why don’t you just leave this forum until you’re able to behave as an adult.