ok , i'm not really on a mission here so no worries .. just got a rumble 40 and got it for its ease of use ..i.e. its light as a feather .. but just wonderin out loud a bit .. because this sucker is so light.. ( and i ain't taken the speaker out ..yet .. just to see for myself .. ) so i'm still in the speculation stage here .. not lookin to do anything crazy .. yet .. i do like that its light so i'd like to maintain that ..but if i was to try and upgrade the speaker ??( i'm sure its been done already ) if i was to do it i'm not thinkin of some 300 watt monster .. its a 40 watt solid state amp for cryin out loud ..so no need to go that far out on a limb ..and 40 solid state watts is probably closer to about 16 tube watts so .. what would be an affordable and light,, but better speaker that would drop in and possibly improve the tone a bit ? if thats even possible ?? just keep in mind we're not tryin to reinvent the wheel ..and money is an object cause who wants to put a 200 dollar speaker in a 150 dollar amp?? i'm sure there are plenty of 10 inch speakers out there that might improve this sucker perhaps ?? without makin this amp when said and done a 500 dollar investment ?? whaddya think ??