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Old 18th April 2004, 06:33 PM   #31
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Well done!

Did you get the paint job finished?
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Old 18th April 2004, 08:50 PM   #32
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Quote:
Originally posted by pinkmouse
Well done!

Did you get the paint job finished?
Thanks

I havent painted it yet. The paint wont effect the sound. :d
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Old 19th April 2004, 12:00 PM   #33
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my jbl is still naked after 12months Click the image to open in full size.

my 360L 33hz basshorn will need something so it lasts a littlewhile..
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Old 19th April 2004, 02:35 PM   #34
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Quote:
Originally posted by mikee12345
my jbl is still naked after 12months Click the image to open in full size.

my 360L 33hz basshorn will need something so it lasts a littlewhile..
While I wait for you to put enough mesurements of your horn to replicate it on your plans, I am going to design a ~40Hz basshorn with the Beta 15 I am using in my sub. :d
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Old 19th April 2004, 02:50 PM   #35
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First off excellent job that thing looks like a killer.

Anyway, Bull said the driver is not meant to play 25hz and will brake over time, ie your box tuning to 25hz. This is complete nonsense. You can play a little iddy biddy tweeter at 25hz for the rest of its life it you want and it wont break and you can hardly say a tweeter is designed to play 25hz! All you have to look out for is excursion limits, the driver its self will not break playing a 1hz tone, but at 25hz it may move a bit more then it would at 35hz so it could suffer mechanical failure. However this would not be a thing that took a while, it would happen almost at once when the thing decided you were playing too much thru it and bumped its voice coil on the front and back plate smashing it to bits. You usually get a good few attempts at this if its a robust driver, but something will give.

What order xover should you use?? depends on the bass type of your main speakers. Are they sealed or ported. If sealed a 2nd order would be good, if ported a 4th order.

Oh and good to hear the linkwitz works great. If you get enough level with the sealed box and the transform then why not just leave it at that, dont bother making a huge whacking isobarik, or just make a sealed iso and linkwitz it again.
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Old 19th April 2004, 04:58 PM   #36
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Quote:
Originally posted by 5th element
First off excellent job that thing looks like a killer.

Anyway, Bull said the driver is not meant to play 25hz and will brake over time, ie your box tuning to 25hz. This is complete nonsense. You can play a little iddy biddy tweeter at 25hz for the rest of its life it you want and it wont break and you can hardly say a tweeter is designed to play 25hz! All you have to look out for is excursion limits, the driver its self will not break playing a 1hz tone, but at 25hz it may move a bit more then it would at 35hz so it could suffer mechanical failure. However this would not be a thing that took a while, it would happen almost at once when the thing decided you were playing too much thru it and bumped its voice coil on the front and back plate smashing it to bits. You usually get a good few attempts at this if its a robust driver, but something will give.

What order xover should you use?? depends on the bass type of your main speakers. Are they sealed or ported. If sealed a 2nd order would be good, if ported a 4th order.

Oh and good to hear the linkwitz works great. If you get enough level with the sealed box and the transform then why not just leave it at that, dont bother making a huge whacking isobarik, or just make a sealed iso and linkwitz it again.
Thanks

Yes, when playing a 30Hz sinewave through it, there was loads of excursion, so I may have a ~18db/oct HPF at ~25Hz to lessen the excursion.

Im using a 2nd order at the moment and it sounds fine. (I think its 2nd order, its 6db/oct. I think it sounds ok, I havent listened to it for too long, ill have to try some different CDs to test it.

Im leaving it as it is for now. I may get a Tempest or even a Tumult from Adire Audio if I can afford it. (£185/£550!) This wont be for a while, so ill stick with what ive got.
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Old 19th April 2004, 05:05 PM   #37
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Congratulations Matt! I'm really glad you've been successful.

6db/octave is 1st order btw.

When the time comes you'll be absolutely stunned by the Tempest, but one step at a time! Enjoy the free driver first!!
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Old 19th April 2004, 07:00 PM   #38
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Quote:
Originally posted by SimontY
Congratulations Matt! I'm really glad you've been successful.

6db/octave is 1st order btw.

When the time comes you'll be absolutely stunned by the Tempest, but one step at a time! Enjoy the free driver first!!

Thanks.

Ahh.

Thanks loads again for the driver. <--smilies cannot transmit gratitude.
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Old 19th April 2004, 07:05 PM   #39
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I'm just really pleased you've made a good home for it!

And if you desire more, you can pass it on again, or rip the cone off and make a bass shaker out of the motor
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