Need your advice to modify crossover.

[floatingfloc]

A friend gave me an speaker box without crossover and drivers,it's 3-way four drivers designed,one tweeter, one midrange and two 6.5" woffers.
So I bought Hivi drivers and Kusan crossover from the market as below and attached.However,tweeter's sound is higher and woffers' sound is lower,so I want to attenuate the tweeter and increase the woffers,need your advice to modify crossover.
Box Dimension : 320mmX250mmX1000mm (L X W X H)
Tweeter : Hivi SD1.1 5Ohms, 91db, >2.5KHz
Midrange : Hivi DMA-A 5Ohms, 92db, >800Hz <6KHz
Woffer : Hivi D6.8 8Ohms, 85db, <2Kz
Kusan crossover : Crossover at 800Hz and 5000Hz,however,will be changed due to the different Ohms drivers,says using in 5~8Ohms tweeter and woffers and 6~8Ohms of midrange.
Could you help to advise to modify the crossover to make it better,thanks a lot.

Walter.

[Inductor]

Invert polarity for tweeter.
Tweeter section here.

[picowallspeaker]

IMHO that crossover elements are strange . Simple calculations make me think those woofers should be 4 Ohm each ,to obtain a low pass with that (low)inductor value .
Probably I'm wrong . But...usually should the midrange be polarity inverted ,in a 3 way design ?

[Inductor]

Mid section here.
For the (2x) woofers section I would use a 100uF cap instead of the 4.7uF, and leave the 15uF in parallel.
This would be my starting point and adjusting everything (and checking for,yes or no, lower resonance on the mid because of high fs). Level and tonal balance the 3-way.
I will check bass and mid bass again in another time.

[PeteMcK]

are there published impedance curves for these drivers?

[floatingfloc]

Hi Inductor,
Will build a new crossover according to your drawing,then let you know result,thanks.

PeteMck
Attached are the curves

[Inductor]

Originally Posted by PeteMcK

are there published impedance curves for these drivers?

Pete, Google,
HiVi D6.8 6" Poly Bass/Midrange Shielded | Parts-Express.com
Médium - HiVi DMA-A Haut-Parleur Médium à Dôme 50mm
Hi-Vi SD1.1-A, 1" Fabric Dome Tweeter, 116 mm flange NLA

Walter,
There's here a close approxim. (in simulation) of what I should have for the woofer section.

Going back. In the mid section, you can smooth a lot the HF (merging with tweeter) if you go/change the 3.30uF (posted) cap to 4.7uF or double the value. The small detail, will only be possible after testing it all, for small in-balances.

Please give heights/location (@center of drivers) from the base of the speaker for all drivers, and location of reflex ports (front or back of speaker/height).

[floatingfloc]

Inductor,
Carefully check your drawing then found no need to build a new, just modification,thanks again.

[Inductor]

Originally Posted by floatingfloc

Inductor,
Carefully check your drawing then found no need to build a new, just modification,thanks again.

I made add/changes components to your xover - do you like it like that? - instead of giving you one with only the new values. To make a swapping of components you just need to add, not so expensive as a new component of full value.

As a final detail, after testing final speaker/xover look for the right attenuation of the mid section (might need adjustments), if it works right and voices good or not, comparing with the rest LF and HF sections.

Note: if it rings ~@600Hz (Fs/Mid) it might need something different. Difficult to tell right now.

[Inductor]

There's a different 3.order xover for the woofer (2. version), that deals with this difficult dome mid (that has an attenuation of ~10dB between 800/600Hz). Inverted polarity. Woofer is also a little critical. Good luck with your moddings.