Raal 140-15d in a 3 way, 1st order xo...

hey everyome

here's my project:

Beyma or Faital 15" pro woofer
Audax pr170mo or PHL 1120 midrange
Raal 140-15d

1st order, passive 1st order series crossover.
xo points: 300hz/4khz?

Can I use the 140-15d crossed around 4khz 1st order?
 
I think these midrange drivers are not the best choice for a 4kHz crossover. You can probably get a flat frequency response, but there will be a problem with directivity, I don't know, but many people say that this is important. A Viawave SRT-7 ribbon tweeter would fit them.
Or replace the midrange with something smaller, 4-5", which could play better up to 4 kHz.
Probably, ideally, it would be possible to make a 4-way with midbass and a domed midrange 😵
 
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If you look at Raals' recommendation a 1.6khz 4th order xo is stated with increased power handling. That xo freq/order would also work nicely with either the Audax/PHL mids. ... and I'd bump that woofer xo up to 500hz as well.
 
How much power handling do you need?
Specs says 200W program handling with 4th order LR @ 1,6kHz.
If you use 1st order @ 4kHz that would be around 1/3 of that

Edit: I agree with #3 you need smaller mid 4-5in for 4kHz XO frequency.
 
How much power handling do you need?
Specs says 200W program handling with 4th order LR @ 1,6kHz.
If you use 1st order @ 4kHz that would be around 1/3 of that

Edit: I agree with #3 you need smaller mid 4-5in for 4kHz XO frequency.
you think the raal could work with a 1st order at 4khz?
the system will be 95db efficient. powered with either a 30 WPC gainclone or EL84 PP amp (15WPC). I definitely couldnt use even more then 10 watts in my room before leaving in panic 🙂
right now my system is already almost the same speaker: eminence pro15, audax 170mo and hivi rt2ha. i want to build a slightly better speaker then what i use now...

i could maybe try to find a 5" that efficient, not sure they sound as good as phl 1120 or 170mo however.