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Diy Driver

1287 Views 12 Replies 7 Participants Last post by  TheEAR
I made a little driver that resembles an oversized headphone driver.


It actually sounds fine, it just takes way too much power. Its nominal impedance is about 1.25 ohms.


With 4 amps of input (20w), it's not too loud. The bass is not lacking at all though.


I want to try putting more power through it. The amp I'm planning on using to power my sub system is rated for 5000w (more like 4300w probably) into 1 ohm in parallel-mono mode.


Does this look coil like it could handle that much for a short period? Thanks
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is that a bowl?
Why yes lol I am rather limited on supplies..


I was going to use an oil can, but I don't have one



Seriously though..I'm quite limited on supplies.


I also thought I'd make one that worked as opposed to Household Hacker's iPod output shorting device. I just used a coil over a magnet (instead of in the gap) and put loads more power on it.
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with 5000 watts you oughtta be able to cook anything in that bowl!
So is the bowl the cone?
Lol I'll probably place it outside and plug it into the amp, then crank some music.


I don't have enough magnet/coil strength (Bl factor) to be able to make the bowl the cone. The coil is actually suspended on cellophane... the fs is extremely low.
Of course it's real!


It's a coil on cellophane with a magnet inside the bowl to provide a magnetic field (though very weak in the fringe field, hence the low efficiency) and the bowl is the enclosure.


It's very bass-heavy, though.

Quote:
Originally Posted by arande2 /forum/post/12799863


Lol I'll probably place it outside and plug it into the amp, then crank some music.


I don't have enough magnet/coil strength (Bl factor) to be able to make the bowl the cone. The coil is actually suspended on cellophane... the fs is extremely low.

Well a low BL and low fs makes me think this good be a good IB driver. What's it's xmax, vd and Qts? Or have you not measured it yet due to needing to be "broke in"?
What I can say is that the xmax is low, the Vd is about that of a 4" driver (making up for the fact that most of this driver is a surround).


According to the way it sounds, I'd say the Qts is high (don't know where I got that...other than a loose boomy sound...)


If someone were crazy enough to buy enough wire, bowls, magnets, and cellophane to make enough of these to supply 110dB/10hz output anechoic... you would need a LOT of power.



You might need like 10000 of them..


That's around $6000 in wire, $?000 in bowls, $?0000 in magnets, and a lot of cellophane!


Crude models show that you'd need about 1Mw for your 110dB fix. Ouch.


Well that was fun to model such an impractical situation where you'd need like 70 -Crest 10001- amplifiers to get 110dB at 10hz.


Bleehhhh
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Quote:
Originally Posted by arande2 /forum/post/12801891


You might need like 10000 of them..

Crude models show that you'd need about 1Mw for your 110dB fix.

Hmm, that sounds like it needs to be in the "crazy DIY" thread
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Wow it is the Tea See Noises PMS-69 ! Yeah yeah one heck of a monster BL and talk about linearity (
).
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