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Really Thankful for the detailed description for the Speaker Repair.
It really helped me a lot. I have a unusual situation here with me. I have dissected the whole console and found the outer band of the speaker has just come off....have attached photos to make it clear. does the outer speaker cone will make a difference or i will have to replace the speakers itself.....when i checked pressing the speaker down and played the distortion had gone....but while playing without holding the distortion would come back....Hope you can help me in this situation....Thanks in Advance.....
A common reason for 'distortion' with all bass amps can be either that the screws holding the speaker unit to the cabinet have worked loose or that there has been a build up of dust particles in the corrugations around the edge of the speaker cone, which rattle especially on the lower notes.
The solution is simple - remove the front grille and check the screws are tight. Use a vacuum cleaner to remove dust from the rim of the speaker cone.
If the cone messed up there would be a lot of rattling. Most likely the subs have just gotten broken in and won't sound as loud as brand new. Over time and with use a subwoofer magnet will start to weaken. When the magnet weakens it won't hit as hard anymore.
Bass drum by convention is ch1 on the board. You need a good drum and a good mic
First set eq flat and pfl ch1, set gain control so drum just hits peak/or red when hit hard.
Send ch to drum group (1+2) on board, or route to master (L+R), depending on type board. Then listen to drum ONLY through the system, and adjust eq so it sounds good at low level then turn it up and keep it sounding good. If it keeps peaking the ch then turn down gain.
There are toys (inserts) you can use noise gates and compressors if available,
Sound is objective and can not be learnt without doing it , good luck. remember good low level sound will always be better than really bad lound sound, start low make it good then make it loud.
Good drums do not need much eq. Get the drum right first.
The Kickers are the way to go here- they move more air because naturally a 15 inch square has more area than a 15 inch circle- thus more air moved =greater spl =LOUDER. The only thing that might get some equality between the two is if the db drive round sub has a far greater xmax that is the linear movement of the cone from start to full excursion-IF the db drive has drastically larger xmax than it could possibly outperform the L7 because of greater cone excursion which also =more air moved=louder---- haha thats a tricky one but ya got me wondering too so let me know what you find out please-Ive always been a kicker fanatic so im probably biased towards their products-never heard nothing bad about db drive though either im in salt lake city i dont know of anywhere out here that even carries their products so i have nothing to reference by except kicker L7's kick asssssssssss
Well to be hones 85 sounds pretty loud to me, generally the bose acoustimass module shouldnt really be distorting or crackling unless under extremely high sound levels.
It could possibley be that the speaker cone in the bass module has a slight perforation so it would distort at high levels. However other problems could be loose connections inside the unt or outside the unit. If your friend doesnt have it above 85 under normal circumstances I wouldnt worry to much about it but if there is a tear in the cone the problem could get worse.