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Multi-Way Conventional loudspeakers with crossovers

lumine-one-2-way
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Old 6th October 2016, 02:57 PM   #1
ckwong99 is offline ckwong99  Hong Kong
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Red face lumine-one-2-way

Can anyone help me modify or change new design of this speaker kit xover
I find its not have a good presentation and the sound not detail

https://www.madisoundspeakerstore.co...y-speaker-kit/
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Old 6th October 2016, 04:39 PM   #2
Face is offline Face  United States
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What are you comparing them to?
Can you describe your setup?
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Old 6th October 2016, 04:45 PM   #3
dragonweed is offline dragonweed  Hungary
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You need to be a bit more specific.. What part of the "presentation " is no good, and in what manner? Bass, mids, upper octaves, sondstage, depth, clarity, coloration, overall musicality?
What are your sources, room dimensions, box positions?
Did you build the kit exactly as specified? Did you (or can you) make any measurements -freq-response, phase, impedance?
If we know more, we can help more.....
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Old 7th October 2016, 12:46 AM   #4
LineSource is offline LineSource  United States
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Can you test the time-alignment accuracy of your Lumine-one? Several new 2-way designs invest engineering into good time coherence.
Reverse the polarity on your tweeter and re-test.

=======WORTH SOME STUDY=====
Troels Gravesen developed a time delay crossover for high-end ScanSpeak Illuminator Monitor (D2904/710003 tweeters. Midbass 18WU/8741-T00. His design produces proper T-M time alignment on a flat baffle using low phase shift LR2/LR2 crossover slopes.

"The crossover follows an LR2 topology. For the bass an RC circuit across series coil provides damping of peak at 4-6 kHz. The tweeter high-pass filter is a bit unusual as it provides compensation for the delayed response from the woofer and allows drivers to be connected with the same polarity. Bottom line is that we can manage a close-to-perfect LR2 topology." Troels Gravesen

Illuminator-Monitor
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Old 7th October 2016, 05:25 AM   #5
ckwong99 is offline ckwong99  Hong Kong
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I exactly bought this kit and finsihed it with installing on 7.5L cabinet. My listening area around 70 sq. feet. Speaker placed in front of me about 6 feet and toe-in 15 degree.
First impression the sound does not much outperformed in high~middle band. The soundstage/image does not in conceret and widen enough. And high/low extension does not enough. And it seems the tweeter and mid-bass drivers working does not in harmony.
Sorry, I don't know how measure the time-alignment accuracy....
So my strategic is simply replace the new or modify exsiting xover , then doing A/B compare on overall performance.
I read the design page of Illuminator-Monitor , it is so tailor-made and sophisticated design. So i wnat to try replace my exsiting xover with it for the comparsion.
However, Troels Gravesen's design he used drivers are 18WU/8741-T00 & D2904/710003, my kit they are 15WU/4741T & R3004/6620. So if I really try this xover on my kit, whether which components value should be changed and have the circuit revised ?

Thanks for your support in advance !
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Old 7th October 2016, 05:38 AM   #6
ckwong99 is offline ckwong99  Hong Kong
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Hi folks,

I also find following page, it seems the desing near close my drivers. Can anyone know my mid-bass driver is 15WU/4741T (following design is 18WU/4741), then how to change the xover design for my usage ?

Illumina-66
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Old 7th October 2016, 12:19 PM   #7
Lojzek is offline Lojzek  Croatia
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I have tried to make some sense out of the data available.
The cabinet was simulated as a very large sealed one, so
I haven't used any other impedance plot but the manufacturer's
in free air because the usual one modeled with TS parameters
doesn't track the measured one with enough accuracy.
Grey curve is out of phase, blue is in phase.
Attached Images
File Type: jpg Madisound's FR.jpg (150.7 KB, 200 views)
File Type: jpg Lojzek's FR.jpg (149.4 KB, 191 views)
File Type: jpg Filter.jpg (32.4 KB, 193 views)
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Old 7th October 2016, 12:52 PM   #8
ckwong99 is offline ckwong99  Hong Kong
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Seems your design is simple and direct use 2 and 3 order .. I will try it tonight . does my drivers can use this xover ?
Thx
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Old 7th October 2016, 02:15 PM   #9
Lojzek is offline Lojzek  Croatia
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Yes, it was made specifically for your units. Original filter didn't follow the usual phase alignment. Maybe that will change now for the better.
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Old 7th October 2016, 02:45 PM   #10
xrk971 is offline xrk971  United States
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This is a pretty premium kit as far as components go and I am surprised that it doesn't sound good. Photos of your implementation as well as a microphone measurement would really help to pin point the problem. If you can afford a $1200 speaker in parts, a $60 mic and free REW software is a trivial investment to better sound.
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