Hello, I just received an lfm 1 plus and hooked it up via high level/speaker level inputs. The sub barely has any volume to it, even when cranked up to 10. I also noticed when i play a song, the led doesnt turn green for 10-15 seconds.

My setup is laptop>dragonfly DAC>fiio a1 amp (2x14w)>cambridge audio s30/lfm-1 plus

I tried messing with the crossover, phase, changing high output/low extension, i triple checked all connections for polarity issues or poor contact. I even opened up the back and checked if any wires were loose on the inside.

I first thought maybe my stereo amp was too weak but i hooked it up to another one (2x68w) and same issue, no change in volume from sub.

The sub-out DOES work though. It gave proper volume. Only when connecting via speaker level does the low output occur.

Is the subs amp broken? I really hope theres something else i could try on my part to maybe fix the problem without having to wait for a replacement amp....