Look at it and figure it out?
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$ 15 in puke n' wipe covered MDF, $ 4 in plastic, $ 25 amp and two $ 6 stamped frame drivers. All tolled, about $ 56 worth.... for that Acoustimess unit.
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If you threw it in a woodstove, it should give you about 10 minutes worth of heat.
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If you threw it in a woodstove, it should give you about 10 minutes worth of heat.
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Yep. 8th order BP.
Looks like the back chamber is the low tuned one and the middle chamber is the higher tuned. I'm assuming that they are using the 6th order 1st 2 chambers to get a broad response range with excursion reduction, filtering of unwanted noise/frequencies and a bit of increased efficiency maybe. The 3rd and final chamber common to both ports I assume is going to tune somewhere between the 2 other tunings and provide further reduction of distortion and driver noise, while perhaps boosting the efficiency even more, but maybe giving a peakier response (50hz-60hz)? I'm just guessing on some of this obviously. Looks like it is a way to get decent efficiency and output over a small range from pretty crappy drivers that would otherwise die with any sort of real bass signal, without the enclosure doing a lot of the work. (why would Bose use this complex design otherwise?
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I wouldn't mind messing around with a design like this. It may be solid if done right (probably tricky) Just imagine if you used real drivers instead? If they can get any real bass out of 5.25" stamped frame $4 speakers it might be interesting with some 8" TB's or something. Maybe use PR's instead of ports.
Looks like the back chamber is the low tuned one and the middle chamber is the higher tuned. I'm assuming that they are using the 6th order 1st 2 chambers to get a broad response range with excursion reduction, filtering of unwanted noise/frequencies and a bit of increased efficiency maybe. The 3rd and final chamber common to both ports I assume is going to tune somewhere between the 2 other tunings and provide further reduction of distortion and driver noise, while perhaps boosting the efficiency even more, but maybe giving a peakier response (50hz-60hz)? I'm just guessing on some of this obviously. Looks like it is a way to get decent efficiency and output over a small range from pretty crappy drivers that would otherwise die with any sort of real bass signal, without the enclosure doing a lot of the work. (why would Bose use this complex design otherwise?
I wouldn't mind messing around with a design like this. It may be solid if done right (probably tricky) Just imagine if you used real drivers instead? If they can get any real bass out of 5.25" stamped frame $4 speakers it might be interesting with some 8" TB's or something. Maybe use PR's instead of ports.
How do I know?
This is the fun one:
http://www.audioheritage.org/vbullet...highlight=4688
W10GTI does fine just by itself, actually:
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Extra credit: Who's the dude with the mic?
This is the fun one:
http://www.audioheritage.org/vbullet...highlight=4688
W10GTI does fine just by itself, actually:
Extra credit: Who's the dude with the mic?
1 - 20 of 110 Posts
