1

DI503J Triple DI and Re-Amp / DI503J triple DI output buffer

« on: February 04, 2026, 06:30:55 PM »

Is the output TS jack of the Triple DI buffered (when not in reamp mode, so just paralleling the input signal).

2

EQ250 stereo equalizer / EQ 250 setup question

« on: January 21, 2026, 03:48:27 PM »

Hi, I want to build a 250 stereo EQ and I wonder how to test the left / right balance. The setup manual says: Do the test with the frequency adjustment potentiometer in the middle of the band, at about 12 o’clock. Measure the central frequencies of the two channels. you get fmin and fmax.

My question is: how to measure this? Do I send an audio signal through the unit and turn (for example) the mid band volume up? And then use a frequency analyzer on the computer and look for 'bump' differences in both channels? If I use an audio signal, what kind (white, sine etc)? So, any tips how to do this measurement?

I understand the part about adding caps when channels don't match. My question is how to measure wether they match or not.