My Topping Pre90 is fully balanced differential with separately buffered XLR balanced and RCA outputs.
Current application for Pre90 variable outputs:
I have a 3rd load, a separate integrated amp with RCA inputs only, to drive discrete reverberant field speakers, one behind each main speaker. Instead of a regular parallel 1 to 2 splitter for the RCA or XLR output, I propose the splitter described below:
Pre90 XLR output > XLR to dual RCA splitter/adapter (RCA #1 comprises pins 1-2 non-inverted, RCA #2 comprises pins 1-3 inverted):
If there's a better option to derive a 3rd variable output, please describe it and state why it's better. I presume, maybe wrongly, that the above-described method is best because it employs a separately buffered source for each of the three loads. Any normal parallel splitter parallels the inputs of 2 loads, minimizing the input Z for no benefit.
Current application for Pre90 variable outputs:
- RCA output 20-ohm > RCA IC > RCA input of main amp > main speakers
- XLR output 40-ohm > XLR/RCA adapter 20-ohm non-inverted pins 1-2 > RCA IC > RCA unbalanced input on 2 sub amps (one per L/R ch) > subs
I have a 3rd load, a separate integrated amp with RCA inputs only, to drive discrete reverberant field speakers, one behind each main speaker. Instead of a regular parallel 1 to 2 splitter for the RCA or XLR output, I propose the splitter described below:
Pre90 XLR output > XLR to dual RCA splitter/adapter (RCA #1 comprises pins 1-2 non-inverted, RCA #2 comprises pins 1-3 inverted):
- Non-inverted 20-ohm output > RCA IC > sub amps > subs
- Inverted 20-ohm output > RCA IC > Reverberant Field Integrated Amp > invert speaker cable polarity on reverberant field speakers
If there's a better option to derive a 3rd variable output, please describe it and state why it's better. I presume, maybe wrongly, that the above-described method is best because it employs a separately buffered source for each of the three loads. Any normal parallel splitter parallels the inputs of 2 loads, minimizing the input Z for no benefit.