www.kabusa.com
Click on phono preamps at the top of the page and then scroll to the bottom of that page for the "phono preamp parameter calculator".
That gives you the ideal gain number for the phono preamp. Unless you are running a passive preamp, my advice to you would be to focus entirely on what you need at the phono stage, which is what the KAB calculator does.
FWIW, I have found it to be pretty much dead on and having either too much or too little gain can be problematic and result in less than optimal sound quality. As you see from the KAB site, optimal gain for .25 mV is around 62 db. 72 db would, IMO, be quite high and in many cases result in overload and compromised sound quality.
Click on phono preamps at the top of the page and then scroll to the bottom of that page for the "phono preamp parameter calculator".
That gives you the ideal gain number for the phono preamp. Unless you are running a passive preamp, my advice to you would be to focus entirely on what you need at the phono stage, which is what the KAB calculator does.
FWIW, I have found it to be pretty much dead on and having either too much or too little gain can be problematic and result in less than optimal sound quality. As you see from the KAB site, optimal gain for .25 mV is around 62 db. 72 db would, IMO, be quite high and in many cases result in overload and compromised sound quality.