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In the Forum: Horn-Loaded Speakers
In the Thread: Chinese upperbass horn.
Post Subject: Re: Chinese upperbass horn.Posted by rdrysdale on: 8/8/2005

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     Hi Romy, I've been following your progress, it seems that you are drawing some very similar conclusions to what Steve Schell and I have learned. The bass horn has to be the proper size in order to work well, we are having extremely good success with our bass compression driver. Our horn is slightly compromised right now, but we are drawing plans for one to work exactly with our driver, it will have about a 7 to 9 foot path. We also discovered that solid state doesn't work well with the bass units, it doesn't even work well with the lowest frequencies. The same rules hold true for the sub woofer, the horn length has to be long enough to propagate the wave properly. We are using about an 18 foot path for the sub. What we need is for some smart electronics guy to design and build a processor just strictly for time correction, and nothing else, no EQ, or crossover built in.
     As far as a high frequency driver goes, we have decided to build our own tweeter. It is going to be a horn loaded ribbon, with a massive field coil motor in order to bring up the flux density to the levels that we need. we need to fill about a 4mm gap up to about 18 to 20 kilogauss, so the motor will weigh about 50 lbs. We have been planning to build a tweeter for about 2 years, now we need one.
     I will soon have an excuse to come to Boston, my niece has been accepted to the Boston Conservatory, I'm sure I will need to come out to see her perform.
Rich

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