Recently I got hold of an Alesis Midiverb 4. Unfortunately I've been getting a loud hiss from the unit, which seems to be made worse when I run it at the the end of my effects chain. Could this be fixed by a noise suppressor? I got no sound from the unit when I put it through my fx loop.

The signal path is:

Guitar - Boss Tu2 - Deviever Shoegazer - Proco Rat - Boss dd6 - Ehx Small clone - Alesis- Vox ac30 cc2.

Any advice?
multicolour random messge!

FAC 13
"The hacienda must be rebuilt"