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Old 16th March 2011, 02:09 AM   #1
jazd is offline jazd  Australia
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Default Full range speakers for boombox

Hi as per title, I need to find some full range speakers for a boombox. Something fairly cheap would be preferable. I am also open to suggestions separate woofers/tweeters if you think that would be better and still affordable.

Stuff I already have -
2x 12AH 12V SLA batteries
Arjen Helder TA2020 2x25W amp (wasnt really planning on using it)
Sure Electronics TK2050 2x100W amp
Massive sheet of 12mm MDF

I would just like a fairly simple sealed or ported box, doesn't really matter how big it is.

Would like decent bass say 40Hz up. 20Hz is unrealistic yeah?

Would prefer drivers from an Australian store but have a package forwarding service I can use in the USA if that will work out better. Thanks.
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Old 16th March 2011, 05:14 AM   #2
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The Dayton ND105's have outstanding bass output for such a small driver.

Dayton Audio ND105-4 4" Aluminum Cone Midbass Driver 4 Ohm

These would work very well crossed with a helper tweeter.

There's a discussion on their forums with crossover diagrams.

on Sale - $55/pr (drivers & XO) - Techtalk Speaker Building, Audio, Video, and Electronics Customer Discussion Forum From Parts-Express.com
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Old 16th March 2011, 06:05 AM   #3
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Quote:
Originally Posted by jazd View Post
Would like decent bass say 40Hz up. 20Hz is unrealistic yeah?
40Hz is comepletely unrealistic as well. Aim for good bass to 90-100Hz.
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Old 16th March 2011, 09:01 AM   #4
jazd is offline jazd  Australia
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Quote:
Originally Posted by XtremeRevolution View Post
The Dayton ND105's have outstanding bass output for such a small driver.

Dayton Audio ND105-4 4" Aluminum Cone Midbass Driver 4 Ohm

These would work very well crossed with a helper tweeter.

There's a discussion on their forums with crossover diagrams.

on Sale - $55/pr (drivers & XO) - Techtalk Speaker Building, Audio, Video, and Electronics Customer Discussion Forum From Parts-Express.com
So what you think I should run 2 of those 4" in series or something? They are a little low in the power department, 30W RMS each. I have a 100W per channel amp. Was hoping for something louder.. That second link seems to indicate they wouldnt be very loud.


Quote:
Originally Posted by Saturnus View Post
40Hz is comepletely unrealistic as well. Aim for good bass to 90-100Hz.
Not even with 8" inch drivers? Those Dayton 4" seem to model OK down to 40Hz in a vented enclosure, then again I might not know what I'm doing. -3db is 35Hz
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Old 16th March 2011, 09:56 AM   #5
jazd is offline jazd  Australia
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Oh yeah and shouldnt I be looking at higher efficiency drivers? Those Daytons are quite low.
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Old 16th March 2011, 10:32 AM   #6
jazd is offline jazd  Australia
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What about two of these in parallel for each channel - GRS 8FR-8 Full-Range 8" Speaker Pioneer Type B20FU20-51FW
Maybe coupled with a cheap tweeter to fill in the high end.

That would give 4ohms so I would get ~100W and they should handle the power. Efficiency is listed as 91dB 1W/1M
Volume could be anywhere in 60-120 L range.. (if I'm using WinISD correctly and not misinterpreting the graph its giving me)
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Old 16th March 2011, 11:18 AM   #7
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Would you be using rollers or a handle on your boombox? heh...depending on your answer, I may have some rediculous yet possible suggestions.
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Old 16th March 2011, 11:40 AM   #8
jazd is offline jazd  Australia
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Originally Posted by aptquark View Post
Would you be using rollers or a handle on your boombox? heh...depending on your answer, I may have some rediculous yet possible suggestions.
I dont really care haha, as long as its mildly portable. Was thinking a longer enclosure that sat on the ground rather than a tall standing one.
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Old 16th March 2011, 12:30 PM   #9
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I dont really care haha, as long as its mildly portable. Was thinking a longer enclosure that sat on the ground rather than a tall standing one.
Yea exaclty. Think center channel speaker. There are quite a few examples of center channel speakers covering lower frequencies (somewhere).
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Old 16th March 2011, 05:00 PM   #10
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Quote:
Originally Posted by jazd View Post
Not even with 8" inch drivers? Those Dayton 4" seem to model OK down to 40Hz in a vented enclosure, then again I might not know what I'm doing. -3db is 35Hz
A boombox is mostly for outdoors use right?

If so remember to add the 6 dB/oct drop below 200Hz, so that -3 dB @ 35Hz is actually -18 dB (or -15 dB actually since it'll probably stand on the ground).

Even with 4 10" drivers my Boominator (over in the class-D forum) doesn't pressume to go below about 90Hz flat (F0).
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