Originally Posted by jlpowell84
So is it possible the unbalanced version is underrated then?
Andy, sorry if it seems redundant to you as you have helped me understand in Carps thread immensely. So if I use 2 outputs on the balanced I ordered today then what Vrms can I expect to get to each of my Submersives?
The 2 Volt vs. 4 Volt discrepancy with the balanced miniDSP is not an issue of conservative vs. optimistic specs. It's an issue of the doubling of output voltage that occurs between the condition of taking output between one single "hot" signal and ground, and the other condition of taking the output between the two "hot" output signals. These latter two signals are equal in amplitude and 180 degrees out of phase, so when you take their difference, the amplitude of that difference is twice that of either signal individually. It's analogous to how 240 Volt AC power is obtained using two 120 Volt lines.
In the balanced miniDSP owner's manual, they specify the maximum output levels of both the balanced and unbalanced outputs as 2 Volts RMS. This is contradictory and simply an error. The amplitude of the balanced output must
be double that of either signal to ground. So one or both of those numbers must be wrong. The spec sheet does call it out more clearly and specifies the correct numbers.
Regarding the unbalanced version, this user
says he is getting audible distortion at levels from 0.6 to 0.7 Volts RMS. His view, which I'll copy below, is the same as mine.
Originally Posted by DrDyna
Perhaps I purchased the wrong units, but I'm still really asking...for whom would these units be the correct units in that case? I mean, these units start reaching audible levels of distortion at somewhere around 0.6 or 0.7v it seems, so I have to ask if anyone actually owns a power amplifier that can deliver it's rated power at that input level.
This is all I'm going to say about this subject.