Phono Preamp Gain Question

Well the KAB calculator is based on the 5cm/s output (CBS standard). If your cartridge's output was measured on the JVC standard (3.54 cm/s), you will have to multiply your cartridge output by 5/3.54 = 1.41 to translate it to the CBS standard to input into the KAB calculator.

In other words, if your 0.28 is measured at 5cm/s, you can just plug it in, if it was measured at 3.54 cm/s, you will need to plug it in as a .39 mV (0.28 X 1.41).

I don't know how accurate that calculator is though. I have an identical cartridge output as you, 0.28 mV. KAB recommends an 'optimum' gain of 61 db, my phono stage has 60 db of gain, and that is MORE than enough. I never turn the volume knob past 10 o'clock. Granted, maybe you listen louder than I do, but I think KAB's measurements are overall preamp gain, including line stage.

Marty, since KAB doesn't know what kind of line gain the user will be using, they also must consider a passive line stage, with no gain. That's why I alluded to the fact that the 61 db of 'optimum' gain should be PLENTY, if using an active preamp.

Because I'm running a cart with the same output (0.28 mV) into a phono stage with 60 db of gain and a line stage with 20 db of gain and the gain is way more than I need. It seems like your situation is almost identical to mine, with similar results 80-83 db of total gain is much more than enough.

So the 61 recommended 'optimum' reference seemed pretty high to me using a line stage with an additional 20 db of gain. Though I'm sure it wouldn't be excessive if I were using a passive preamp.

Jmcrogan, I am using the same cartridge as you. And as I stated above, my preamp, a Modwright 36.5, has 12db of gain. The responses above have more or less convinced me to not consider the ARC PH6 or the CJ TEA2SE. I think my focus now will be on the Herron VTPH-2 and the Pass X-15. Both of those should have plenty of gain; in fact I know that Dodgealum used the 36.5/VTPH-2 combo recently with great success.