GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Horn-Loaded Speakers
In the Thread: Problems with horns: upper bass

Post Subject: Long and lowPosted by jessie.dazzle on: 11/17/2008

Romy wrote :
"...I have no way now to look at the right number but how I “feel” is you shell be arriving under 8’ of length and 40Hz cutoff with 8” throat. With 4” throat you will be looking at 12” or so…"

For info : In my case, I am using an 8" throat (15" drivers), a 40Hz cutoff, and an exponential profile... I'm writing this from my day job, so don't have the precise figures at hand, but if memory serves, the resulting horn comes out to around 2.90 meters, or well over 9 feet in length without the driver or rear chamber installed.

"...Jessie...plans to put his 40Hz horn in other side of listing position (meaning behind the listener)… and who know – it might work and his upper bass horn hold the right location of fairly directional lower mid range. There are a lot of moments like this in horn practice..."

Yes, though this is the less-favored "short wall scenario", which is one of two possibilities in the given room ; the other being to place the system against the long wall, setting the mid-bass horns in front of the listener, (conventional placement to the left and right sides of the MF/HF horns), thus condemning a huge percentage of prime living space. I am favoring this scenario.

Incidentally, a little motivational experiment was recently made possible; with half a horn complete and laying flat, the missing half substituted by the floor, I had my "assistant" (who has quite a low voice for a female) speak into the throat while I stood at the other end of the room. Result : Amazing; all the detail of someone speaking directly into my ear! Then I put a transistor radio in the throat and listened to various stations. The local classical station just happened to be braodcasting suitably LF-oriented material... Though we are talking about sound emanating from a 3" driver, this still gave a little preview of the potential, and I ended up installing a folding chair there, listening for quite a long time.

Strength, power and courage to you Dresden,

jd*

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