Madisound recommended a SB Acoustics speaker. The specifications look to be similar to the Audax. Thoughts?
The Madisound Speaker Store
The problem is you can never find a drop in replacement.
The biggest problem is that the acoustic response of the two drivers is very different. The Audax shows a rising response at 1 KHz. The SB unit a rising response at 3 KHz. So the crossover would have to be redesigned.
The SB unit has an Fs of 33 Hz and the Audax 48 Hz, the VAS of the SB unit is almost twice as high as the Audax unit. The Qs are close and so is the sensitivity. However the box would need retuning at least. I would have to play with it to see if that were possible. Quite likely new enclosures will have to be built.
If you just replaced the drivers with the SB units, you would have a very poor speaker without extensive redesign.
The bottom line is that starting again form scratch ends up being a better simpler solution, than trying to replace drivers, almost always. Either way you will not have the same speakers you had.
