Is there a way to calculate (without hearing the equipment) how much gain it would take for a turntable and phono stage to be approximately as loud as the other components? So when you turn the selector knob, they sound about the same? Suppose we have numbers like this:

Cartridge: Goldring GL2200 - Sensitivity 6.5mV±1.5dB, 1kHz @ 5 cm/sec

Preamp: Adcom GFP-565 - Input Sensitivity - High Level 205 mV, Phono 2.3 mV
Input Impedance - High Level 22,000 Ohms, Phono 47,000 Ohms/100 pF

CD: Adcom GCD-575 - Output Level 2.5 V RMS


My goal actually isn't just sameness. It's to understand how much the phono stage gain will impact volume. I don't have the option of auditioning phono stages. I'm probably going to buy one online. I see the Jolida tube phono stage has something like 70 dB gain, while the Pro-Ject has 40 and the Bellari has 30.