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Multi-Way Conventional loudspeakers with crossovers

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Old 16th September 2013, 06:29 PM   #1
xymox1 is offline xymox1  United States
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Default Reverse engineer xover - help please

I have what appears to be a complex xover I need to reverse engineer. Its from a speaker system thats not normal. Its very phase coherent. This is the mid-bass xover from a YG Acoustics Anat 3 main module. Im trying to get more bass extension and im trying to figure out if its the xover thats limiting me ?

Is there a way to model this xover ? Some computer based simulator ?

But I also want to understand it better.

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Old 16th September 2013, 06:34 PM   #2
xymox1 is offline xymox1  United States
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2 of these drivers are hooked to the above xover.. http://www.scan-speak.dk/datasheet/pdf/15w-8531k00.pdf
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Old 16th September 2013, 07:13 PM   #3
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As I understand, the system contains a pair of mid-bass drivers. They are not designed to produce very low frequencies. The crossover is designed to limit the low frequency energy (the L-R-C across the output of the crossover). You can disconnect one of the three parts and listen. Please be aware that those parts were included for a reason.
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Old 16th September 2013, 07:56 PM   #4
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Looks like the series notch filter at the end would be the bass limiter. Try bypassing the 5.6 coil.

Usually though, these things aren't put in for no reason as Frank has mentioned so you remove one part, you may end up throwing the whole thing off. A series notch is usually used to flatten the impedance top and bottom to allow the other components to more easily do their job.

Smarter people that me here so maybe someone else can chime in.
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Old 16th September 2013, 08:24 PM   #5
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Wouldn't that just be a mild notch around 700Hz? Doesn't seem like much of a bass limiter to me. Did I miss something?
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Old 16th September 2013, 08:29 PM   #6
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If was intended as a notch, why wouldn't they use a parallel I wonder?
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Old 16th September 2013, 08:35 PM   #7
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I dunno, I'd guess the resulting change to the load seen by the rest of the filter was useful? Just saying the values don't look like they'd touch the bass.
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Old 16th September 2013, 08:36 PM   #8
Dissi is online now Dissi  Switzerland
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It's a 4th order low-pass filter and an additional notch flattening the surround resonance at 800 Hz. None of the components does limit the bass extension in any way.
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File Type: jpg CrossoverXymox1.jpg (59.5 KB, 101 views)
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Old 16th September 2013, 10:25 PM   #9
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Why doesn't the 5.6 choke shunting the woofers in the series notch have that effect?
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Old 16th September 2013, 10:57 PM   #10
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Because there's a small capacitor in series with it.
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