I have a question for anyone able to or interested in answering. I have attempted twice to rebuild an MTX 9515 motor (4in coil) into an 18 using an 18" TI basket. Both times I have yielded good Fs of around 30, but the electrical Q and total Q I am unable to get down low enough for myself or where I would like them. I suspect one of several reasons. I chose to use a coil that is not the original MTX coil but the ID and OD are a match. The winding height is more by about 1/2in. Would the overall mass have any bearing on the electrical Q? My suspicion is the motor originally was not engineered for a larger cone/mass. Any thoughts on this? Maybe I can attempt a third top assembly and keep the Mass at or around 400g? Should I try to use an original or oem MTX 9500 4" coil?
thanks.
thanks.
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