Anyone seen this yet? Looks pretty cool
Adire Audio - Kali
4" XBL² motor, 3kW RMS. Dual Aluminum Shorting rings. Nice. I think I shall get a 12" when it's available.
Pics are property of Adire Audio.
I also saw they have the KH3001 subs which are also 4" coil, but overhung motors.
Adire Audio - Kali
4" XBL² motor, 3kW RMS. Dual Aluminum Shorting rings. Nice. I think I shall get a 12" when it's available.
Pics are property of Adire Audio.
I also saw they have the KH3001 subs which are also 4" coil, but overhung motors.
One can always (and usually) undersize a little bit and EQ to taste.
Adire says the 12" Kali won't be made for close to one year since they don't have the tooling for it at the moment. Oh well, looking to see it get done eventually.
I've noticed that about the XBL^2 drivers in general. Seems more "B" is needed in the BL, though there's likely some good reason why they're designing them that way.
Since the magnetic gap is split into two separate (but close together) gaps, BL does tend to suffer, so Qts ends up in the higher range (most are not under 0.40 Qts), but it's not overly outrageously high either. The good thing is that since BL is very constant over a long stroke, the Q does not shift [under high-power] anywhere near as much as overhung driver do when they start to lose BL (which is almost as soon as it starts to move if the curve is a "sharp" parabola). So under high-power operation, their Qts is actually lower than some other drivers that have a lower initial Qts under small-signal analysis.
I just picked up four 10" Brahma 10D2's since all Brahma's were 30% off for Labor Day.
I just picked up four 10" Brahma 10D2's since all Brahma's were 30% off for Labor Day.
High-ish Qts works for me! Adire just had a 30% off sale (it might still be going on) and I picked up a 15" Brahma for use in an H-frame dipole subwoofer at a GREAT PRICE! I have been waiting to pull the trigger on one of these guys and I was so glad to be on their mailing list and get the sales announcement!
Sure, you can toast your breakfast bread on this speaker.
And along with that 3000 watt flame-proof construction you have to accept a mass of 570 grams (AKA slogging around a pound and a quarter.... more than a stack of MacDonalds burgers, eh). Along with massive weight comes all kinds of painful compromises.
Makes no sense to me to walk down that path - unless you have a dance club or young children who play with your volume control.
The closer a radiating surface is to the weight of thin air, the better any acoustics textbook likes it - like plasma tweeters and electrostatic speakers and even true horns.
And along with that 3000 watt flame-proof construction you have to accept a mass of 570 grams (AKA slogging around a pound and a quarter.... more than a stack of MacDonalds burgers, eh). Along with massive weight comes all kinds of painful compromises.
Makes no sense to me to walk down that path - unless you have a dance club or young children who play with your volume control.
The closer a radiating surface is to the weight of thin air, the better any acoustics textbook likes it - like plasma tweeters and electrostatic speakers and even true horns.
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Weight is counteracted by force. In the end it comes down to what the motor is capable of, Qes, since it takes motor force and moving mass into account already. So, sorry I don't buy that line of thinking. I'll go down my path, you may continue on yours.
I guess I am rusty about the math these days. Can you post the model relating Qes, motor force, and moving mass for what you are saying please.
B.
An externally hosted image should be here but it was not working when we last tested it.
As one can see, a low Qes can (but is not always) be attributed by a large BL in the denominator. And since the quantity is squared, the denominator has a very good "leveraging" effect on this function, which if one considers BL to be the variable, it is of the inverse-square law. Thus two low-frequency speakers of equal Qes (which is the dominant figure of merit, between it and Qms, that is), have the same level of electrical damping, because of what I said previously: a large Mms (in the numerator) can be counter-acted by the appropriate increase in BL in the denominator.
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