We are not all made equal and normally size doesn't matter, but in this case... it does.

Some patch cables are slightly smaller spec than what the audio jacks expect.  

It's a very tiny discrepancy but it will cause some movement within the jack which results in unpleasant noises.

You can do a very easy mod that will eliminate this issue

Just add a jumper from the ring to the sleeve.

- we didn't think we would need this but it has now been updated on all new Reverbs.

This will not void your warranty.

There ya go!  Happy little Reverb :)