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In Reply to: RE: Inlow Sound's 130 Hz midbass horn posted by hvbias on March 11, 2016 at 04:17:14
You did ask.
It's possible that using the Inlow 100hz horn would do a better job at going to 100hz that the doubled 130hz horn. It goes up to 500hz well. If you want down to 90hz, then he has an 80hz horn, but it only goes up to 400hz, and throws you out of whack with your mid horn. Nothing wrong with a sub from 100hz on down. You could make it a horn sub if you wanted to go all the way. Bill Fitzmaurice comes to mind.
If you crossover at 500hz you have a lot more choices with horns and drivers than 400hz. Also, 400hz pretty much guarantees a three way plus sub. Still it has it's charms.
Think twice about GOTO. I'm sure they're great, but their mouths are only three quarters on an inch. For a mid or mid-bass driver that's archaic. It guarantees a long hyperbolic (which is exactly what GOTO horns are) profile which is going to be high distortion, and that's not going to sound very good. Sometimes the Japanese worship a little too devoutly at the alter of WE. John's suggestion of using the Le'Cleach profile would be making the best of that bad situation.
Have at it!
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Big speakers and little amps blew my mind!
Follow Ups:
Yes, that is a very good point about the GOTO drivers small exit. There are a couple of people that have used them with more modern horn profiles with throat adapters. For my intended use I would only be using them from about 500-600 Hz on up, no super expensive 4" exit midbass compression drivers for me :) I will probably only look to GOTO after trying others out (or skip them altogether). I do have a bit more leeway since I am doing this multi amped and via DSP.
The reason I was looking into a scaled up 135 Hz horn is an 8" driver has lower moving mass plus should work better into the midrange over the larger drivers.
hottattoo I just re-read your comment about Cessaro, aren't they using tractrix horns for midrange on up?
hvbias,
Cessaro uses a spherical horn profile. My friend is the USA importer for Cessaro and I help him set up at audio shows. Do a search of the Rocky Mountain Audiofest from 2 or 3 yrs ago for some pictures. The mid range horn is about (my guess) 24" diameter and about 18" deep but weighs approx 175 lbs !!! and over 1000 lbs per channel. Some kind of special resin concrete--a bitch to lift up and install needless to say.
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