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Multi-Way Conventional loudspeakers with crossovers

Proac crossover
Proac crossover
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Old 29th September 2019, 06:33 PM   #31
Galu is offline Galu  Scotland
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The capacitor in parallel with the ATC SM 75-150 shown in post #26 should be 4.7uF and NOT 15uF.
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Old 29th September 2019, 07:17 PM   #32
Galu is offline Galu  Scotland
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WAIT A MINUTE!

I've just spotted a mistake in one of Datsun's component values in post #10, which I've been wrongly working with!

The rule is that if the driver impedance is halved then the inductor value should also be halved and the capacitor value should be doubled.

Thus, referring to the original crossover scheme the midrange components should be changed to:

C3 = 47uF, L2 = 0.65mH, L3 = 0.45mH and C4 = 18uF

So its neither 4.5uF or 15uF, but should be 18uF.

Hope this finally clears things up!
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Old 29th September 2019, 07:24 PM   #33
Galu is offline Galu  Scotland
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P.S. Since 18uF is not a standard value, you will have to approximate it by wiring two capacitors in parallel e.g. a 10uF and an 8.2uF.
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Old 29th September 2019, 08:05 PM   #34
Galu is offline Galu  Scotland
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Or, more sensibly in your case, put a 3.3uF in parallel with your existing 15uF!

Please let me know how it goes.
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Old 30th September 2019, 02:48 PM   #35
Datsun is offline Datsun  Russian Federation
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Location: Krasnoyarsk. Siberia.
Quote:
Originally Posted by Galu View Post
C3 = 47uF, L2 = 0.65mH, L3 = 0.45mH and C4 = 18uF
Sorry, this is my typo - the shunt capacitor should be two times the nominal value - 18 μF. ((
I sometimes use LC_Filter.
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Old 30th November 2019, 12:43 AM   #36
miguelnoda is offline miguelnoda  Spain
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Default Crossver proac ebs

The crossover in the middle and lower part works very well with these new values but the upper part sounds advanced and with sound as distorted or with grain I would like to attenuate or sound without being ahead of what I could do, insert some resistance?
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Old 30th November 2019, 02:08 AM   #37
Galu is offline Galu  Scotland
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If the treble is too strong, then try increasing the value of the tweeter resistor R1 to 4.7Ω.

A higher value such as 5.6Ω or 6.8Ω may be necessary - work your way up if required.

If that proves unsatisfactory, then report back.
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Old 30th November 2019, 02:22 AM   #38
AllenB is offline AllenB  Australia
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You want the sound to be the same as the original...

I think you should leave the woofer and the tweeter crossover original. Then compare the 8 ohm and 16 ohm response so you can create the difference. You must also compare the 8 ohm and the 16 ohm impedance vs frequency. This is much easier to do with a simulator.
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Old 6th December 2019, 07:23 PM   #39
miguelnoda is offline miguelnoda  Spain
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Default crossover proac ebs

the sound with that grain in the high part was suspicious to me that the d2010 were distorting I had the opportunity to try others and they no longer do it, I think that with the Wilmslow Audio filter they lowered the frequency cut a lot and broke down.
now they work well but I would like to put some better twetter
They could advise me with the same characteristics or modifying the croossover.
Cheers
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