Ok here is the deal. I got pair of old Philips kit speakers. However, woofer is not original, Seas 25f-ew installed instead.
Midrange is Philips AD5060/sq8
Tweeter is Philips AD0160/T8
Crossover is quite simple, there is nothing for woofer. mid/tweeter crossover is cascade: 36µF/0.6mH+10ohm resistor in parallel/12µF highpass -> midrange (no lowpass) -> 2,2µF -> tweeter.
So crossover frequencies are something like 1500/5000 or so.. sound is pretty good tho.
As the woofer is not original I'm trying to make all new crossovers. I dont quite like the fact that 10 inch woofer is naturally crossed quite high especially in 3-way systems.
I have made MANY two-way speakers but 3-way is much more difficult. As far as I know, AD5060 should be good beetween 700-5000Hz.
What would you do?
Midrange is Philips AD5060/sq8
Tweeter is Philips AD0160/T8
Crossover is quite simple, there is nothing for woofer. mid/tweeter crossover is cascade: 36µF/0.6mH+10ohm resistor in parallel/12µF highpass -> midrange (no lowpass) -> 2,2µF -> tweeter.
So crossover frequencies are something like 1500/5000 or so.. sound is pretty good tho.
As the woofer is not original I'm trying to make all new crossovers. I dont quite like the fact that 10 inch woofer is naturally crossed quite high especially in 3-way systems.
I have made MANY two-way speakers but 3-way is much more difficult. As far as I know, AD5060 should be good beetween 700-5000Hz.
What would you do?
Both woofer and mid should have a lowpass. A threeway brings the opportunity to use the crossover between woofer and mid to correct the baffle step function. The 25F-EW will do fine up to 1kHz according to the response graph on the data sheet, so that option seems valid and useful to me.
This could be a fun project as the woofer is the old Dynaco A-25.You could take some hints from the Dahlquist DQ-10 and Infinity Qb and make a sort of Dynaco 3 way.
Some photos. The speaker itself and some measurements (bare drivers without crossover ).
The last measurement is the midrange on and 45deg off axis.
Midrange has some peaking around 1kHz and tweeter peaking at 15kHz. Flush mouting might be a good idea.
All drivers are behaving quite well being 50years old!
Overall sensitivies are quite similar so no need for attenuators, well maybe some fine tuning at most 🙂
The last measurement is the midrange on and 45deg off axis.
Midrange has some peaking around 1kHz and tweeter peaking at 15kHz. Flush mouting might be a good idea.
All drivers are behaving quite well being 50years old!
Overall sensitivies are quite similar so no need for attenuators, well maybe some fine tuning at most 🙂
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