Would this work to make a HT bypass?

Hi, I have a Denefrips Athena passive/active preamp (passive for signal path and active for solenoids. The problem is I want to have my HT go through it... I currently am taking the XLR preouts on my Marantz AV8805a preamp and feed them into one input on the Athena stereo preamp. In order to do this I need to raise the level on the Athena preamp to 38 on the volume (the volume goes from 0-60 with 60 being maxed). if I forget to reduce the volume on the Athena to no higher than 14...it could blow a driver when switched to listen to Roon.

So I was wondering if I inserted a XLR mic gain box between the Marantz and the Athena...would that solve my gain issue?

like this one...

https://www.amazon.com/Cloud-Microp...fos.f5122f16-c3e8-4386-bf32-63e904010ad0&th=1