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Old 2nd March 2013, 02:41 AM   #1
gio89 is offline gio89  United States
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Default crossover help for my boombox

I have built this boombox
Click the image to open in full size.
It sounds good but I would like to make sure it sounds the best.
I am using a lepai amp and hivi b3n speakers, but I would like to add a crossover and these dayton audio tweeters. If any one knows a crossover design to add tweeters to these speakers it would help me out greatly.
Right now they are 8 ohm speakers but ideally I am looking for 4 ohms after the added tweeter if its possible.
Thank you for anyone that can help.
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Old 2nd March 2013, 07:50 AM   #2
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gio,
You can use the standard approach...
Help understanding speaker design
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Old 2nd March 2013, 08:09 AM   #3
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As a last resource/reference or just a starting point look at the Carmina's (w/ Dayton ND20FA-6).
Boxsim Projektdatenbank Carmina
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Old 2nd March 2013, 05:30 PM   #4
gio89 is offline gio89  United States
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These are almost the same speakers and tweeters, can i use this crossover design?
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Old 2nd March 2013, 06:53 PM   #5
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Yes, the Overight Sensations are a very similar pair.
With time you will need small crossover mods.
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Old 2nd March 2013, 08:08 PM   #6
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As a reference you will need to mod the sensitivity of the crossover with the new drivers.
L-pad is playing with original drivers 8R/10R (series/parallel)
for Dayton ND20FA-6 3/4" (~90dB) and you're moving to Dayton ND16FA-6 5/8" tweeter (~89dB). You need to go up 1-2dBs here.
The same with the Swan Hivi BN3 vs. HiVi B4N 4" (82dB vs. 85dB). You need to drop ~3 db's here to match your smaller driver. All in all you can start to change your crossover l-pad for less 1 or 2 dB.
Overview M3N Full-Frequency_HiVi, Inc.
Large Bande - HiVi B4N Haut-Parleur Large-Bande Aluminium-Magnésium 4"
(Note) you might be happy with the result before changing, you will probably will notice the tweeter louder to start with, there are more important details like a good integration of the two drivers at crossover frequency.

Last edited by Inductor; 2nd March 2013 at 08:16 PM.
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Old 3rd March 2013, 04:50 AM   #7
gio89 is offline gio89  United States
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You provide great information.
Thank you for all the help.
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Old 3rd March 2013, 07:39 PM   #8
gio89 is offline gio89  United States
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Will this crossover give me a good integration of the two drivers at crossover frequency.
What did you mean by that?
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Old 3rd March 2013, 07:49 PM   #9
balerit is offline balerit  South Africa
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You have to measure the impedance at the desired crossover frequency.
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Old 3rd March 2013, 07:57 PM   #10
gio89 is offline gio89  United States
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This will be my first crossover build, I was hoping to follow the overnight sensation crossover with a little modification thanks to the input of Inductor above.
How do i make sure the crossover frequency is perfect?
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