While official datasheets are frustratingly difficult to find, community contributions have pieced together a rough picture of its electrical behavior and internal makeup.
: You cannot simply omit the low-voltage wires. The LFMA 00690 amplifier requires all four control lines (+7V, -7V, STB, GND) to remain connected and balanced; otherwise, it triggers an immediate protection shutdown. hys3c210-cs power supply
Do you own a or a soldering iron to perform basic board checks? GND) to remain connected and balanced