Signal is still being passed and amplified without the proper load terminations. The amplitude of signals is reduced due to the lack of current flow, but that doesn't mean that the devices aren't sustaining some type of wear and or damage.
Try taking an amplifier and running it with no load with rated input. Theoretically, there is no voltage or current flow due to the infinitely high impedance it sees as a load, so there should be no problems. Wait a while and see what happens. While you might say that this is not a fair comparison, it is. It's just that the results that occur are far more visible / easier to measure with the amplifier. The same results / circuit degradation is taking place in the line level gear, it just isn't as evident or abrupt. Kind of like a slow and punishing life rather than a more timely death. Sean
>
Try taking an amplifier and running it with no load with rated input. Theoretically, there is no voltage or current flow due to the infinitely high impedance it sees as a load, so there should be no problems. Wait a while and see what happens. While you might say that this is not a fair comparison, it is. It's just that the results that occur are far more visible / easier to measure with the amplifier. The same results / circuit degradation is taking place in the line level gear, it just isn't as evident or abrupt. Kind of like a slow and punishing life rather than a more timely death. Sean
>