JLNorthGA
Active Member
We are doing a musical (Spitfire Grill). We haven't been plugging our Yamaha Clavinova into the sound system for rehearsal as it had been in a rehearsal room rather than in the orchestra pit. We moved it into the pit when we started get ready for the performances.
We hooked the Clavinova into the sound system by hooking up a 1/4 TRS cable from the L/L+R 1/4" jack into a DI box. The DI box was then hooked into our sound system via a XLR microphone cable.
Initially there was no problem. However, after about a hour or so, there was an annoying hum.
I swapped out the cables and the DI box. It worked fine - for a few minutes. Then the hum started again.
The Clavinova does not have a grounded plug. The noise only occurs when the instrument is plugged into the sound system via the DI box. I suppose we could run 1/4" TS cable to the Clavinova.
Thoughts?
We have had grounding issues (annoying hums) from time to time.
We hooked the Clavinova into the sound system by hooking up a 1/4 TRS cable from the L/L+R 1/4" jack into a DI box. The DI box was then hooked into our sound system via a XLR microphone cable.
Initially there was no problem. However, after about a hour or so, there was an annoying hum.
I swapped out the cables and the DI box. It worked fine - for a few minutes. Then the hum started again.
The Clavinova does not have a grounded plug. The noise only occurs when the instrument is plugged into the sound system via the DI box. I suppose we could run 1/4" TS cable to the Clavinova.
Thoughts?
We have had grounding issues (annoying hums) from time to time.