It's unlikely to destroy the device - there's an expectation that someone will plug in an unbalanced TS connector - but it will often lead to increased distortion on the output while it's connected that way. Connecting headphones directly to line outputs just won't work well because the line outputs aren't designed to drive a low impedance load like headphones. Distortion will go up, and there will probably be variations in frequency response as the headphone impedance varies with frequency, interacting with the relatively high output impedance of the line outputs. You would be much better plugging the 371s into the headphone output, or getting a headphone amp to put between the 3&4 line outs and the headphones.So from what I get, I shouldn't use the balanced OUT (with the adapter) because it could destroy my device.
I could use the RCA out and the linked cable but it is not as powerful as the headphone out?