I have a umc1820 which is less than 2 weeks old from new. From setup input 2 was fine on TRS. Input from a Korg Monologue. Now the level is seriously low. I have checked the cables and done some signal path checking, swapped cables and it seems this issue is related to this specific input. I have connected to the ada8200 using the same cable and the signal is fine and full. On the 1820 the signal is weak and isn't picking up low to low mid frequencies.
Does anyone know what this could be about?