ANTHONY2181 said:Hi i have a pair of kef 104 speakers they use a B200 BD139 passive radiator and a T27 tweeter i have the crossover design + i know the guy that was on the design team at kef in the 1970s
Yes. I'd build one from scratch with better parts. The box could use some work too.
Make sure you have the correct specification Kef drivers.
(Tapped inductor is some form of contour control built into 104aB's.)
If you do not have the correct specification drivers then its likely
better to use a KEF crossover for that specification driver.
It would 1000 percent necessary to include the passive radiators in to your design why would you even consider removing it . Perhaps putting it on the back might work but that would change phase a bit .In my opinion, the 104ab is a superb reference monitor. With tight low and mid-low bass, and a very open wide mid-high and high band spectrum . I've tested it with several amps: Akai am2400, Yamaha CR 420 and Harman Kardon HK6300 (bizarre fresh opensound!) and very satisfied with it.
Does the fact that it is a closed box with passive radiator have an effect on the crossover? Or could I rebuild a box with the same speakers (T27, B200 SP1039) vented / leaving out the passive radiator?
Thanks for all the info on this forum, I like reading it!