low xlr output

Anyone got any ideas on why the xlr balanced output would be quieter than rca.

Normally it would be the other way around, this is on my perreaux r200i tested from my xa5400es and hapz1es

boomtheroom01-24-2023 10:58am

wlutke Details Discussions Posts This discussion Message User 744 posts 01-24-2023 at 02:08pm Copy Comment URL Report Comment Edit Delete I'll guess you are bypassing the pre (direct mode). An XLR cable has an in phase signal and a 180 out of phase signal when it arrives at the pre. That's why there are two 'hots" in the cable. If you are bypassing the pre (direct mode) and using the volume controls of the players instead, the XLR signal is probably bypassing the diff amp in the pre. The diff amp amplifies the difference between the two hots. When a 1 volt peak signal arrives at +1 volt, the other arrives at - 1 volt. The diff amp "sees" the difference (2 volts) and amplifies it. That's where the boost in volume (gain) comes from. Any EMF picked up by the XLR cable is in phase (same in each hot conductor) so is eliminated at the diff amp, which only sees a difference. `
wlutke Details Discussions Posts This discussion Message User 744 posts 01-27-2023 at 04:36pm Copy Comment URL Report Comment Edit Delete Not about the jumpers but... From Stereophile: "The maximum voltage gain with the R200i's volume control set to its maximum (an indicated "59") was 46.5dB for both the balanced and unbalanced inputs." Could this be a clue?