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Multi-Way Conventional loudspeakers with crossovers

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Old 6th October 2013, 11:40 AM   #21
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sreten

I am using the Accuton C158 8 085 midrange.

When I was listening to the 2-way section, I fell in love with the openness of the sound. When I added the capacitor for the high pass, something happened. That cleanliness, or openness of the sound was subdued. I have on hand Duelund CAST PIO's, Duelund VSF's, Mundorf Silver/gold/ oil, and even more.

It didn't matter which cap I introduced, or which combination of caps, that sound which I loved was gone.

Adding the notch may be the wrong way of doing it, but it sounded better to my ears.

I have no empirical data, just the smile on my face.
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Old 6th October 2013, 01:05 PM   #22
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Tinitus
Please help. Where would my phase problem come from?.
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When I was listening to the 2-way section, I fell in love with the openness of the sound. When I added the capacitor for the high pass, something happened. That cleanliness, or openness of the sound was subdued. I have on hand Duelund CAST PIO's, Duelund VSF's, Mundorf Silver/gold/ oil, and even more.
my guess is it's primarily caused by the sidemounted woofer
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Old 6th October 2013, 01:52 PM   #23
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Tinitus, you have hit the nail on the head. Yes, the side firing woofers are my last obstacle.

The natural rolloff of the midrange, coupled with the high pass notch, gives me a steep drop starting at 120Hz.

My testing now involves inverting the signal from the woofers, and adjusting delay. This is proving to be the longest to solve problem, but the DSP helps.

In the future I might try facing the woofers forward, though this will make for a very wide speaker.
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Old 6th October 2013, 02:31 PM   #24
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What is your crossover point between the woofer and midrange? What are the frequency responses of each without the crossover? Have you measured the driver/box impedances?

I think that the side mounting issue is a red herring- your real problem is the first order crossovers, which are extremely unlikely to give you a 6dB/octave acoustic transfer function- and are HIGHLY sensitive to physical offset. Your focus on the capacitor brands suggests that you haven't really looked at the fundamentals here. and that's likely where your problem is.
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Old 6th October 2013, 03:57 PM   #25
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I have only ever seen Electro-Voice implement a vented mid-range
CV was another. 15" 3 way with a 10" vented mid.
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Old 6th October 2013, 07:08 PM   #26
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I think that the side mounting issue is a red herring ...
no problem if crossed low, and active

but with a midrange rolling off at 100hz by itself ...

adding a cap, and it might start rolling off much higher

and further, at ressonance it might also cause a bump

as described, it worked better without any crossover on midrange
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Old 6th October 2013, 08:12 PM   #27
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CV was another. 15" 3 way with a 10" vented mid.
Altec's 6041 studio monitor 'mid' is a vented 604 :

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Old 6th October 2013, 08:42 PM   #28
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Altec's 6041 studio monitor 'mid' is a vented 604 :

GM
is it a 2.5way ?
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Old 6th October 2013, 09:52 PM   #29
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No, discrete 3 way.

GM
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Old 6th October 2013, 10:07 PM   #30
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big driver in small vented box ?

I suppose it gives some 'midbass gain, and they thought it sounded better that way

early BSC compensation ?

when was this speaker designed ?
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