Increasing a Low output MM

@mdrone  : Thank's. According the real time measurements made by J.Atkinson in theory the true gain is a little over 37db so you don't have to have a problem running  your cartridge other that maybe a higher than normal noise levels but the critical issue with your unit is that its RIAA accuracy is really poor and goes against the quality levels that your cartridge can shows:

https://www.stereophile.com/content/leben-rs-30eq-phono-preamplifier-measurements

R.

Paradox phono-30 amplification is done via a pair of LSK170 JFET to providing 30dB gain and an external plug for loading your cartridge with any value resistor.

You would need a head-amp with flexible loading and gain options. The Hagerman Piccolo is perfect for this, and not too expensive either. The only potential hang-up is it lacks capacitive loading options, though technically you can play with cables for this. 

What is the gain of the line stage that you are using? You should add that to the 28db gain of the phono stage!

+1 for yogi and mulvie. No self-respecting MM phono stage would offer only 28db gain, is an editorial opinion. But if you love it, and if your linestage doesn’t help enough, add an upfront gain stage. Not a SUT.