Unfortunately, the question is asked about a completely unsuitable product. The amplifier here is used to connect a record player to a high level input such as AUX or Line etc.. Amplifying a microphone signal is a completely different task.

I am running my 2 turntables with 2 different phono preamps each. One of them is the PA 506. Both always sound quieter than other sources. I think I would have to buy a more expensive version where the output signal can be adjusted, otherwise a pure preamplifier would come into question. The PA 506 also equalises and two in a row probably won't do any good.

It is very unlikely that anyone in the community has already compared these two products 1:1. Furthermore, the PDX015 is rather intended for the computer.

Yes, it works very well. Connected these to my Sonos system.

The following is all included in the scope of delivery: 1 "PA 506" stereo phono preamplifier 1 power supply unit 1 cinch cable 1 instruction manual See also manufacturer's page (where it also has a picture of the back of the product with the connections): https://ch.hama.com/00040506/hama-stereo-phono-vorverstaerker-pa-506-mit-netzgeraet-230-v-50-hz