Series cross-over

[Piersma]

Hi all,

Would it be possible to build a series cross over with these VIFA drivers:
Dome midrange VIFA D75MX-31-08
Tweeter VIFA XT25TG30-04


XT25TG30-04 Tweeter

Nominal impedance [ohm] 4 SPECIAL FEATURES:
Voice coil resistance [ohm] 3.0
Nominal power [W] 140 Dual concentric
Short term max power [W] 950 diaphragm (Patent)
Long term max power [W] 400
Operating power [W] 5.3 Non reflective
Sensitivity [dB] 91.5 dual chamber design
Frequency range [kHz] 1.5-40
Free air resonance [Hz] 500 Voice coil with
Voice coil diameter [mm] 25 copper-clad aluwire
Voice coil height [mm] 2.2 and braids
Air gap height [mm] 3.2
Voice coil inductance [mH] - Controlled directivity
Eff. diaphragm Area [cm²] 5.4 design
Moving mass [g] 0.30
Magnet weight [g]/[oz] 240/8.5 No ferrofluid
Force factor [Bl] 2.5
VAS [l] 0.017 High power handling
Qms 2.50
Qes 0.71 Wave-guide center
Qts 0.55 plug (Patent



D75MX-31-08 Dome midrange

Nominal impedance [ohm] 8 SPECIAL FEATURES:
Voice coil resistance [ohm] 5.9
Nominal power [W] 80 Precoated fabric
Short term max power [W] - diaphragm
Long term max power [W] -
Operating power [W] 2.5 Low moving mass
Sensitivity [dB] 92
Frequency range [kHz] 0.5-6 Internal ferrite
Free air resonance [Hz] 300 magnet
Voice coil diameter [mm] 76
Voice coil height [mm] 3 Very linear impedance
Air gap height [mm] 2
Voice coil inductance [mH] - Internal Diaphragm
Eff. diaphragm Area [cm²] 55 protection grille
Moving mass [g] 3.3
Magnet weight [g]/[oz] 240/8.5
Force factor [Bl] 4.7
VAS [l] -
Qms -
Qes -
Qts -


Any comment or suggestions would be very welcome.

regards,

Piersma

 

[bambadoo]

www.acoustic-reality.com/ar-sxo.htm

 

[bambadoo]

http://www.acoustic-reality.com/us_diythree.htm

 

[bambadoo]

I have used a 3 way ar-sxo series xo for my construction with great luck
http://194.248.247.76/hifi/projects/

Will finish the project in about a month or so. Regards

 

[Piersma]

Three ways series cross over

Hi Bambadoo and others,

Thanks for the usefull link you posted !
Can you post your three way cross over for us.
It would be helpfull to me and probably other enthousiasts.

Thanks so far.

best regards
Piersma

 

[bambadoo]

Yes I will , when I have tuned it to perfection.
But my 3 way series XO is really a 2 way Capacitor less version, with a second orden Low Pass for the woofer section.
The drivers are:
SS d2904/9800 tweeter
2* SS15w8530k00 Midrange
SS 25W8565 -01 woofer

Regards

Will keep you posted

 

[bambadoo]

And I will also recommend you to post your question on the madisound discussion board.

 

[bambadoo]

http://www.speakerbuilder.net/web_files/Articles/perkinsxo.htm