2 x 12" + 2" part 2

2.5 way crossover usually seems to be implemented by having the woofers in parallel and putting an inductor in series with one of the woofers so it has a LPF at the baffle step frequency. bass is increased by 3dB giving a flat response through the baffle step region.

alternatively you could wire the woofers in series and put a capacitor across one of them to implement the LPF. the response woudn't be flat but you would have the extra power and excursion capacity to get flat response with eq. would lose 3dB of headroom on the amp but the higher impedance load at bass frequencies would help.

the hf crossover is between the tweeter and the top woofer, rather than all three drivers. the midrange is covered by one driver rather than two, and at bass frequencies the two woofers are close enough that they act as a single source anyway.


Edited by snowflake - 20 May 2017 at 5:04pm

Fair enough I haven't compared the 70l @ 68Hz vs 100l @ ~65Hz sims so it's hard for me to judge.

Does the 2" driver need it's own separate compartment?

Edited by darkmatter - 20 May 2017 at 12:39pm

does anyone use 2.5 way crossover on boxes like this? should give loads better vertical pattern that way.

bmwkid wrote: Llo all, I've been busy choosing the drivers and making first designs. Here a picture of what it is atm :p I went for 2 x  RCF MB12N401 speakers to accompany the RCF N901 HF Driver. I'm just having trouble tuning the cabinet for these speakers. De manufacturer says to tune at 60Hz, but that gives this result in WinISD Tuning at 95Hz gives a peak at 100Hz. I need some help here on what to do before i finisch upthe design. All suggestions are welcome :-) Kind regards.

My x2 12" + 2" built by Ultimate sounds