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In the Forum: Horn-Loaded Speakers
In the Thread: How to USE “Resonating Oops” in loudspeakers
Post Subject: One man's junk is another man's... Uh... Injection Channel?Posted by jessie.dazzle on: 6/10/2007
Romy wrote :
"If someone discover a 4-5” driver that can have the same Syrupy Sound as the Red 10” then please let me know"
I will be trying some older alnico drivers in the Mid-Bass horns (the first pair should arrive in about 2 weeks time).
I have been thinking in this direction since you started experimenting with the injection channel.
Then...
One day this week, sitting next to where I had my car parked was a large pile of rubbish. In this pile was an old home-built speaker enclosure, complete with very old full range driver (Divine Provenance?). I of course could not just leave it there... So I gently placed it in the trunk .
Removing the ugly fabric covering exposed what is obvioulsy not expert carpentry work (the whitish stuff is filler). The driver has a cast aluminum frame and a paper cone/suspension, with the magent out in front, so it pulls rather than pushes the cone (while doubling as a phase plug?). I estimate the enclosure at 1.5 to 1.75 cubic feet. It is not just a box (it would seem the builder was somewhat knowledgeable) ; it is made from 3/8 inch thick, very lightly braced plywood.
This weekend I finally listened to it... Just placed it near the right channel, and connected it to the 16Ω tap (the coil measured about 7.5Ω). I was not expecting much.
But...
This thing actually sounds pretty damn good all alone! It is colored, and yes, a bit syrupy is exactly how I would describe it ; but overall, very very non aggressive and really pleasant. Ah... Tone...
Then I tried it with the rest of the system.
While not at all implying that I have a "Romy-Quality" Injection Channel here, the effect of using this thing with no filters, positioned completely arbitrarily, is enough to suggest that (what there is of) my system can benefit from the presence of such a driver... Where and how it might be used is not certain, and I don't know which is contributing more to the listening pleasure ; driver or cabinet.
I will spend some time to find a better position, and wire in a high-pass filter.
I still have no idea who made the driver... Getting that information will require that I open the box, which is not at all made to be opened.
This event really reinforces my curiosity to try such drivers in the Mid-Bass horns. As there are plenty here in Europe, that is exactly my plan (most however are not 16Ω... don't know to what extent that might be an issue... all my other drivers are 15/16Ω... Does anyone have thoughts on this?).
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