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Reseanable 12" drive |
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discodave 
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Joined: 26 January 2008 Status: Offline Points: 287 |
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 Topic: Reseanable 12" drivePosted: 03 August 2012 at 6:50pm |
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I'm looking to build some relatively small reflex cabinets to be crossed to around 120hz some thing around 20 litres does and have and suggestion to a sencable priced 12" drive I'm going to put a beyma bullet for the hight
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ceharden
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Joined: 05 June 2005 Location: Southampton Status: Offline Points: 9208 |
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Posted: 03 August 2012 at 9:36pm |
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The problem you've got is that a bullet won't do anything below 4-5kHz but most 12" drivers have an upper limit of around 3kHz if you're lucky. The only drivers which will reach high enough are quite light coned and relatively low power handling.
You might get away with something like: http://www.bluearan.co.uk/index.php?id=CELTF1220&browsemode=category# |
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dlyxover
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Posted: 03 August 2012 at 9:40pm |
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maybe look at a coaxial?
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In the Truth there is no news, and in the News there is no truth
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ceharden
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Posted: 03 August 2012 at 9:48pm |
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Could always use a twin cone for a cheap option!
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discodave
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Posted: 04 August 2012 at 9:38am |
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What are twin cone sound quality like tho do they sound narsty like like a fete pa them Celestion seem ok with speakers do you have to reproduce all frequency for instance if to cone stops at say 2500hz and tithe bullet starts at 5k will them missing freqancys have a big effect would you ear it on in this case no ear it?
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ceharden
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Posted: 04 August 2012 at 9:55am |
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Some of the twin cone drivers don't sound too bad actually. Still not anywhere full range but the second cone does provide some useful extension to the frequency range. I think I'd rather use the twin cone driver rather than leaving a gap between the midrange driver and the HF.
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discodave
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Posted: 04 August 2012 at 2:17pm |
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Do you have any suggestion on make or model of twin cone I think the only ones Iv seen eminace ones I was think of giving Paul from loudspeaker recones a ring to se if he could make me one up to experiment with I duno how it will perform being a small encloser
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Tony Wilkes
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Posted: 04 August 2012 at 3:58pm |
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Instead of the Beyma Bullet why just use a suitable Comp and horn, why make things difficult when it is not necessary.
Tony |
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www.forteaudio.eu - BMS - db-Mark Processors
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discodave
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Posted: 04 August 2012 at 4:23pm |
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I have 4 just sitting here so tought I would put them to use thats all and being only a 20-25 liter box I'm not to sure how the driver will perform so didn't won't to chuck to much money at it I'm not expecting it to blow me away there being used has infills around aride regards john
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ceharden
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Posted: 04 August 2012 at 8:34pm |
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Steve_B
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Posted: 04 August 2012 at 10:12pm |
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20 litres is a small cabinet for 12" drive unit. It is half the size of this:
 If you must go down the route of cheap 12" in such a small cabinet you might as well go with a sealed box. Why not use a smaller drive unit if you need to keep the box size down?
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ceharden
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Posted: 04 August 2012 at 10:45pm |
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20-25L is fine if you're only interested in 120 up, I've built a few that small. Yes there would be some sense in a sealed box but personally I'd probably leave the port there just to help keep the cone excursion under control if it does end up being run lower.
I suspect that a 12" twin cone driver + bullet in a 20L box is actually a fairly reasonable suggestion for the intended application. At least it's not going to be a 12"+Piezo box. |
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