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Post by kruzty on Jun 29, 2007 20:08:15 GMT -7
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Post by benttop (Steve) on Jun 29, 2007 21:56:16 GMT -7
Yeah, Ted lays it out a bit differently, and makes a lot of sense. I still intend to do a test here - I'm really curious about this now.
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Post by Jan on Jun 29, 2007 22:32:08 GMT -7
My background is physics, and this is a problem that just begs me to do some research. I have kept silent because acoustics was not my area of concentration, but I know enough to know that the problem is not straight forward and simple. Damned complicated, actually. I have a few texts that discuss the scenario, but the math a lot more than I am willing to speculate about without spending a lot more time than I have available to get comfortable with it. The human ear is a marvel but it is not an accurate measuring device for gathering data.
As I said, acoustics was not my area of concentration. However, it is familiar enough and I have appeared in several court cases as an expert witness in matters of sound levels (local newbies trying to close an old private air strip) so I am not entirely without opinion on the subject.
Data. I need data. I will need oh, half a dozen speaker cabinets consisting of several designs and a boat load of speakers... And time. Lots of time. Anyone want to donate hardware to the cause? <very big silly grin>
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Post by benttop (Steve) on Jun 29, 2007 22:36:07 GMT -7
I have a perfect setup for a test here - a 2x12 cab wired stereo. That's about as scientific as I'm going to get, but I think I'll be able to resolve it for myself, if not for anyone else.
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Post by benttop (Steve) on Jun 30, 2007 7:53:22 GMT -7
I've been thinking about this, and I'm not sure I can prove anything by doing a test. The issue is the impedance change when you add a second speaker. Now you're running off a different tap on the output tranny, and who's to say THAT wouldn't produce a volume difference? It could, depending on a whole list of other variables that I'm not interested in pursuing.
In fact, I'll go one step further - it is very likely using a different tap on your output transformer causes as big a difference in volume as adding another speaker might. Or it is just as likely that it causes a loss in volume equal to any gain you might get from adding a second speaker. And every amp would be different.
I think I'll still do the test, just for fun, but I'm now thinking I can't prove much of anything that way. I would have to control things much more tightly to actually prove anything - as in measuring the exact input voltage on the speaker terminals, using a signal generator instead of a guitar, and using calibrated tools to measure the speaker's output. I don't really have the facilities to do some of that here, so I'm going to have to settle for a simple recording test with my impression - not represented as fact.
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Post by John on Jun 30, 2007 8:46:11 GMT -7
...does anyone have aspirin?
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Post by dixiechicken on Jun 30, 2007 12:22:54 GMT -7
I'll just add a little footnote th this thread. The originator of this thread started out with a deceptively easy question about loudness. The discussion has digressed somewhat , I will have to take some of the blame for that. However, sometimes when people will ask me - what speakers to buy to get a better sound in there home hifi - I will simply ask them: Have you tried to move the speakers to another location/position in the room? This surprisingly often is by far the easiest and cheapest way to get a better sound. Best of all it will save quite a bit of dough, that you can use on one Dr-Z amps instead. Thats what I call budgetplanning. ;D Cheers: Dixiechicken
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Post by guitarcrusher on Jul 27, 2007 21:25:38 GMT -7
I am a biologist so I would like to weigh-in. Molecular genetics is much easier to understand.
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