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Old 29th June 2003, 01:20 AM   #1
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Default Dipoles KICK ***!!!

Today my dad and I built our first experimental dipoles, and on a scale of 1-10, I give a full 10.1 for satisfaction. The drivers used are some we picked up at Radio Shack on clearance for $3 apiece, and when we got them home, I thought to myself, why even bother?

Well, as I learned today, it's all about the enclosure. The drivers in anything else I had tried sounded horrible, all midrange and no oomph, but the dipole configuration really made them into full-range speakers! I am amazed; I never believed a single transducer with no crossover could *possibly* sound this good. The bass is full, punchy, and not floppy or boomy at all, and everything else sounds great too! I even think this box sounds better than one of my $300 studio monitors in the bass department, because the bass extension is so much better.

Seriously. If you are at radio shack and see these 8" drivers on sale--they're paper through and through, with itty bitty ceramic magnets and in general they look like pieces of $#!&, snatch them up in droves--in a dipole configuration, they're the best thing since crossovers.
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Old 29th June 2003, 01:26 AM   #2
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Yes dipoles are nice...I love my Magnepans and I will probably start a project with some Tang Bands.

The absolute best part about Dipoles? The freaking cost!


Hell I even mounted 3 8" drivers to a 12x48 MDF shelf that cost all of $5...didn't sound bad....not the best drivers and the efficiency sucked wang, but it was allright for a $5 board and extra parts....radio shack 8"ers by the way....not as quite as bad as yours
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Old 29th June 2003, 05:41 AM   #3
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Default Dipole

Have you used any 6dB selving filter and notch filter to flatten the response, or are you driving it straight from your amp and it sounds good.

What is the dimension of your box.
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Old 29th June 2003, 07:50 AM   #4
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So are you using it as a full range speaker or a low frequency speaker? How do you have the drivers wired?
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Old 29th June 2003, 02:17 PM   #5
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Right now it's set up as just a sub, crossed at ~100hz using my $40 digital crossover (Soundblaster Live!) but, used as a full-range speaker, it sounds very good indeed!

I haven't played with any filtering or EQ except the crossovering, largely because I don't have a measurement mic to use for such. (Wanna send me one? )I did some more side by side listening with my studio monitors and I've decided it needs more in the 10k+ range, but I haven't gotten to actually implementing that yet. Today's Sunday, and I need to go to church first.

The whole thing, outside dimensions, 10" deep, 11" wide, 20" tall.

All told, the project cost less then $20, and IMHO, leaves many commercial offerings for dead.
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Old 30th June 2003, 06:58 AM   #6
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Quote:
Right now it's set up as just a sub, crossed at ~100hz using my $40 digital crossover (Soundblaster Live!)
im guessing you're using the bass redirection feature of the sblive..ive just discovered that recently its' great... i got my card crossing @ 91 hz..


Quote:
I haven't played with any filtering or EQ except the crossovering
When u start playing around with filter/EQ, I highly recommend checking out the sblive parametric equalizer.
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Old 30th June 2003, 07:25 AM   #7
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What is the model radioshack drivers are they?

--
Brian
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Old 30th June 2003, 02:43 PM   #8
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Actually, I'm using 2 SBLive!'s at the moment (helps with production work) and I'm going to buy a third when my pocketbook permits me to do so.

The really cool thing is that I'm not using Creative's sucky drivers, I'm using the kX drivers, available here:

http://kxproject.spb.ru/index.php?skip=1

These drivers will, when I get the third card, allow me to use the third card as a 3-way stereo crossover, at whatever frequencies and slopes I wish! It also allows for real-time effects boxing (though you might have a hard time getting enough inputs), corrective EQ, and all sorts of other cool stuff that's not possible with the normal drivers.

The model numbers? I don't have the boxes anymore but here's what's stamped on the backs of the drivers:

Radio Shack
40-1271C

8ohm, nominal 5W
MAX 10W
Korea 7 A 7
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Old 30th June 2003, 04:53 PM   #9
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wow...im pretty blown away right now.. i knew the sblive was a
great card but i never knew about the kX drivers... very interesting..

my current crossover setup is i got sb live 5.1 setup in 5.1 mode..im only using the sub out and the front channel..with bass redirection turned on..each output is going into a separate active crossover and then going to a seperate amp..

i thought i had an unusual setup but your with the soon to be 3 sound cards takes the cake.. wow..

keep me posted on how that's going..
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Old 30th June 2003, 05:06 PM   #10
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heh, will-do.

Seriously though. If you were really desperate, you could use the individual outputs of the card and have a 6-way mono crossover... these drivers are just so useful, I don't know how I've lived without them for so long.

Bass redirection is great though. My studio monitors would run out of excursion below 60 hz before, but now 60 hz plays almost exclusively on the subwoofer, so I can have the whole system play louder than before.

I'm looking now at the possibility of getting drivers with greater power handling and xmax than the ones in there now; the only downside is that I'd probably lose out on the full-range capabilities of this speaker. As it stands, I just have to turn up the treble knob on my mixer and this dipole is a full-range speaker. I'm amazed.
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