Woofing modes?

[mARKw]

I have my G-System relays changing the voicings on my 2:90 but when I change from a preset that uses only Modern voicing to a preset that uses Modern and/or Half there is quite a woofing sound with a brief drop in volume. When I go the other way, there is a brief volume swell and the woofing sound as well. :?

Anyone else get this?

 

[18&Life]

HALF is suposed to cut half power= lower volume
When I change between DEEP and MODERN there aren't any woofs or drop in volume :wink: