I've had 3 dif. versions of the combo / single 12" speaker over-time (2000 JCM). Plus, others~* 
-though these have some inherent flaws in design, so must be careful when purchasing used...
Mine, not his/or the newer versions, insofar as I am aware^ (^;_*~>__.0}=]
IF, you'll notice, or note* on His "preferred," settings; he 'quickly,' switches channels (red lt., to green).
Or, it might've made a little bit more noise, or worse : blown?!?..


-though these have some inherent flaws in design, so must be careful when purchasing used...

IF, you'll notice, or note* on His "preferred," settings; he 'quickly,' switches channels (red lt., to green).
Or, it might've made a little bit more noise, or worse : blown?!?..

