General description This output shield is made especially for the MIRAND Audio AK4490 USB Audio DAC, but it can be used for all dacs’s having a voltage output, preferable differential out. The module is completely discrete and all stages runs in Class A. All outputs are Singleended class A equal to the frontend opamp on TSSA V2/V4/V8 control board Key specifications Supply voltage : +/-15VDC DC offset: <20mV dc Single ended and balanced output. Gain from balanced input to output : +6dB Input impedance : 3.24Kohm per diff input Discrete SSR for transparent mute circuit. Size (WxLxH): 71x110x20mm (With molex connector)
can you play [email protected] file, an measure with DMM set to Vac what you have between XLR pins 2 and 3 of DAC output?
so no guesses, you will get rms reading
logically, no connection to preamp, DAC being standalone
I need help... When I put in Q3, Q4 IRF9240 and in Q7 I put IRF240, I have + - 13.8V. But when I put SJ618 or 2sj201 at Q3 and Q4, and 2sk1530 or 2sk4397 at Q7, at the output I have half the voltage (around + -7V)