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Multi-Way Conventional loudspeakers with crossovers

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Old 16th June 2012, 11:18 PM   #41
ODougbo is offline ODougbo  United States
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Okay...1st result. The crossover point seems a bit low - around 900hz.

What was the goal, 1,500hz?
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Old 17th June 2012, 10:50 AM   #42
ODougbo is offline ODougbo  United States
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Default Yikes!

Not sure what is going on but the tweeter is so low I can not tell if it is working.

Extremely hard to tell where the sound is coming from, even with 6" foam blocking the woofer.

Is the crossover wired correctly?
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Old 17th June 2012, 11:22 AM   #43
ODougbo is offline ODougbo  United States
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Okay sorry, my mistake...had a 10Watt .47ohm resistor on the L pad. The cross over point is somewhere near 1,800

Last edited by ODougbo; 17th June 2012 at 11:45 AM.
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Old 17th June 2012, 12:01 PM   #44
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Is there any solution about tweeter always blowing? because my power amp is 400 watts and my tweeter is 150 watts / 8 ohms only, can somebody recommend value of limiting resistor fit in that to avoid blowing the tweeter?
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Old 17th June 2012, 12:09 PM   #45
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Is there any solution about tweeter always blowing, because my power amp is 400 watts, single channel, and my tweeter is 150 watts/8 ohms only, can any recommend limiting resistor for that to avoid blowing?
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Old 17th June 2012, 12:15 PM   #46
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I use polyswitches for anything that will be subjected to abuse. They work very well and will have minimal effect on the speaker when working normally.

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Old 17th June 2012, 12:35 PM   #47
ODougbo is offline ODougbo  United States
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Smile Success!

Hey they sound great...hard to believe they stopped making the woofer, great bass.

The imaging is nice and they sound solid! If I could change anything, maybe a bit more treble.

Good Guesswork 7

Thanks again...
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Old 17th June 2012, 01:06 PM   #48
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Good news. Imaging is good because the phase is nicely aligned.

What you call treble is a bit vague, of course. We have been guessing on the tweeter. It's that 2-5kHz region to align here. All the metallic harmonics and sibilance. Dire Straits "Water of Love" and Paul Simon's "Take me to the mardi gras" are good tests. If you are overly bright, the trumpets in the Paul Simon piece sound too loud and intrusive. But you want some energy there.

You're main options to increase treble energy are to drop the woofer capacitor from 15uF to 10uF which boosts the 2-4kHz range and should sound musical, or increase the tweeter capacitor from 3.3uF to 4.7uF. Changing the 3.3 resistor in the tweeter attenuator to 2.2 will boost the very top end.
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Old 17th June 2012, 03:22 PM   #49
ODougbo is offline ODougbo  United States
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I don't think I want to change the woofer components, they sounds great. Also I did hear some highs that Morels do not have.

I'd like to brighten up the tweeter just a bit.

Going to order some more parts Monday.

Sorry this is so painfull, never did anything with resistors (been using L pads); and hence the project.
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Old 17th June 2012, 03:35 PM   #50
system7 is offline system7  United Kingdom
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You'd be surprised what a difference a smaller woofer capacitor can make. It's subtle really, but you gain MUSICALITY. Which is hard to describe, but the whole lower range can gain an effortless nice and clear acoustic.

In your case, the woofer rolloff is probably quite high, and it overlaps with the tweeter, so it can make a couple of dB difference around 2-4kHz. There's a sweet spot that you can HEAR with woofers.

In fact, I've got to log out and do something similar to mine. 15uF is just not doing it. I need 10uF.
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