two 10s or a 15?

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Steven Kephart

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Posted: May 09, 2004 at 8:02 PM / IP Logged

Here's what our Brahma user manual says about break-in:

"Break-in is best accomplished once the driver is installed. The first 2 days of use, keep the volume way down. Over 99% of all break-in problems are not from the driver, but from the setup of the system. Any time you change out any piece of gear in your system – including a driver – there is the chance that wires will be knocked loose, gains/controls bumped and set wrong, etc. Spend the first few days finding all these problems. Only after the system has proven to be very reliable and solid (no cutouts as you go over bumps, well balanced, etc) for a minimum of 48 hours should you begin turning it up."

As for CES, unfortunately I have never been. I got hired at Adire only a couple months ago. But I will be at CES next year. So if you go, look me up.

Your above idea is intriguing. I will have to pass it on to my boss to see if it will work right. It sounds good to me though. Although no offense to you, but I wouldn't be surprised if he has looked into it before. IMO we have some of the most intelligent engineers in the industry working for us. If you haven't read about the XBL^2 motor, I recomend you doing so. It is rather ingenious. Also look at our new arachnid spider. It is the one used on the Parthanon subwoofer found here: http://www.adireaudio.com/Files/Dan/Parthenon/ It keeps the Kms curve perfectly flat. We rate it's linearity to 10% of K instead of DUMAX's standard 400% of K. And tolerances per spider are less than .1% rather than the standard 30% tolerances on standard spiders.

Steven Kephart

Adire Audio

Ravendarat

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Posted: May 09, 2004 at 8:16 PM / IP Logged

Wow, I thought I had a pretty good understanding of how car audio worked but you guys are talking so far over my head I feel like Im 6 feet under. Super interesting stuff though.

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Ketel22

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Posted: May 09, 2004 at 10:03 PM / IP Logged

thats why i love this site. learning new stuff every day....

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DYohn

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Posted: May 09, 2004 at 11:08 PM / IP Logged

I believe Tesla (one of my heroes) invented an adjustable impedence voice coil for use in telegraph systems that has been used by Altec Lansing in an adjustable Q loudspeaker. I'll have to look that up tomorrow at work. We use some adjustable low frequency drivers in one of our test rooms to create different Q room environments... but that's different from what you're discussing. Also, take a look at the technology n the KEF Reference Series Model Four, which was an amazing loudspeaker system back about 8 years ago that maintained a single Q number acrosss the entire audible spectrum. Amazing stuff.

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Ravendarat

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Posted: May 09, 2004 at 11:18 PM / IP Logged

Isnt the infinity perfect avalible with an adjustable q

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Steven Kephart

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Posted: May 09, 2004 at 11:37 PM / IP Logged

Ravendarat wrote:

Isnt the infinity perfect avalible with an adjustable q

Yes it is. By removing one of the plugs, you make the pole piece smaller saturating it earlier. This reduces the B field, thereby effecting Qes, and from that Qts. What they don't tell you is that by lowering the BL, Fb drops which can effect your in car frequency response. Also efficiency and Re are also effected.

By using a resistor, I don't think as many of the parameters are effected.

Steven Kephart

Adire Audio

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two 10s or a 15?

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