DOD FX96 distorted delay

[artstomp]

..hey gurus...my DOD FX96 Echo FX Analaog Delay has distorted delay signal on 9v power supply...
..but when i use a 12v power supply the distortion goes away...where should i start probing to check the problem?..thanks in
advance....

[TGP39]

I'd start with your 9 volt power supply.  Try a different 9 volt supply or battery.

Steve.

[artstomp]

...i already tried a fresh 9v battery and a BOSS PS120S power supply...the distortion seems to go away with 12v power supply only...



..tnx Steve

[TGP39]

The only thing I can think of is more voltage usually equates to more headroom. As to why this distortion is just starting now? I wonder if swapping out the NJM4560 with a better spec'd op amp would help?