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Multi-Way Conventional loudspeakers with crossovers

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Old 24th January 2012, 12:48 AM   #581
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After attaching the base to the bottom of the baffle, next item was to glue and screw the baffle / wing supports to the baffle. A note on the plywood. You might be able to see some chipping at the base of the plywood. This is from my power handsaw. I pre-cut with my power handsaw a little oversize and then finish cut on my portable table saw. It was easier to handle that way and none of the chipping is on the visible side.
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Old 24th January 2012, 11:23 AM   #582
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Securing the wings to the Baffle and supports was straight forward. I added an extra horizontal screw on each side (don’t forget to glue first) at the base to help support the overall baffle structure. Then added the top portion of the base structure where the crossover will mount. A note on the relief for the Vifa. John specified a 4.5 inch by 7/16 deep relief. Mine is only 4 inches wide. I did not have that size router bit and didn’t want to spend 30 bucks on one.
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Old 24th January 2012, 11:42 AM   #583
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Just though I might throw this out there. I build this about 4 years ago.

NaO Micro
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Old 24th January 2012, 11:54 AM   #584
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John K., are you serious ? this speaker (NaO micro) is just to put on your desk ?
How can you have a decent output level with a 7" (125cm²) on an OB ?
I experimented with 2x7" and it was not enough !

Here the manzanita, you have a 12" (525cm²) and it can provide good level output... No comparison can be done...
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Old 24th January 2012, 12:01 PM   #585
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depends on music, volume, and how far away you sit.

bass support is usually a welcome addition if it doesn't hurt the mids too badly.

Norman
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Old 24th January 2012, 01:35 PM   #586
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Shortwave

Thanks for sharing your build experience and pictures. It will be interesting to get your feed back on how they perform. What amplifier do you plan on using with them?
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Old 24th January 2012, 03:39 PM   #587
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Quote:
Originally Posted by jerome69 View Post
John K., are you serious ? this speaker (NaO micro) is just to put on your desk ?
How can you have a decent output level with a 7" (125cm²) on an OB ?
I experimented with 2x7" and it was not enough !

The low sensitivity and limited SPL are why I never really released th micro. However, look at the SPL vs cut off frequency;

Click the image to open in full size.

If you can live with the low sensitivity then crossed into a sub at 150 Hz it can achieve 104 dB (4Pi) per side. Crossesd at 200 Hz that increases to 112dB. The problem is more one of low sensitivity.

Actually it was a very nice sounding speaker. If you compare it so something like an LS3/5a or other small 2-way monitor it holds up quite well. Nice little bedroom speaker.

2x7" will work very well in a 3-way configuration like the NaO II or Note.

Anyway, the thread was titled fast, fun, inexpensive OB. The micro fits that topic so I though I'd put it out there.
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Old 24th January 2012, 05:02 PM   #588
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John K's design really is magnificient in it's smallness. But see there is nothing simple here, beside the carefully constructed crossover you also have a notch for the Peerless break up mode, a notch for the baffle hump and very thoroughly estimated zobel corrections. The result is a virtually flat frequency response with ample high SPL capabilities. Quite a contrast !

/Erling
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Old 24th January 2012, 05:59 PM   #589
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Originally Posted by john k... View Post
Just though I might throw this out there. I build this about 4 years ago.

NaO Micro
Thanks John K. Lots of great reading. Already looking into building one.
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Old 24th January 2012, 06:00 PM   #590
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Looking good! Thanks for the pix. Let us know if you need any help.
The offer is appreciated.
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