The L50 has a 4pin XLR output and a 3.5mm stereo output.
Back on page 1 in the review, The 4-pin measured 3.881vrms while the 3.5mm stereo jack measured 1.983vrms.
To me, this suggests that it is not a bad idea to pick up a 4-pin to 3.5mm adapter in order to get more gain, "if you want it".
It isn't a balanced amp and if it was it would probably be noisier at this price point but I ordered an Ali-Express adapter simply to get more gain
from the AMP as I am currently inputting a signal from my Behringer UMC HD404 audio interface which has a sickenly underpowered
audio output (1.???vrms. this has been measured on the site but I can't be bothered to go look it up).
If I had a DAC that was pushing 4vrms out to the AMP I suspect I wouldn't have any desire to adapt the output.