Comments on: It’s Just Cool: Dodecasub http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/ All tools. All the time. Your source for news, information, and reviews of hand tools, power tools, and tools of all kinds. Mon, 13 Oct 2008 04:24:21 +0000 http://wordpress.org/?v=2.6.1 By: dodecaguy http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-322632 dodecaguy Mon, 19 May 2008 16:52:34 +0000 http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-322632 The Electrotap hemisphere is a full (actually midbass and above) range device using two way car speakers. This is a subwoofer. The Instructables project is an interesting starting point for the same. The D1 weighs about 80lb without drivers, and the drivers are Elemental Designs 11kv2. A fully loaded cabinet is well over 200lbs. Yes, materials cost is much less. However, after you build the first three or four cabinets and figure out how to make the cabinets well the cost does go up. We call that "value added". We hit 119dB at 21Hz, 138dB at 53Hz, 148dB at 76Hz and the limit was the 2500W amp shutting down. More power would get a +3dB bump but more than that and you'd have to run PA amps off dedicated 240V circuits. In my experience almost no one has actually experienced 110dB at 20Hz in a room. In a car, not really too much of a problem. At lower SPL the sound is definitely different from a single-driver sub. Each driver stays pretty much at the neutral position, which means very low distortion. The Electrotap hemisphere is a full (actually midbass and above) range device using two way car speakers. This is a subwoofer. The Instructables project is an interesting starting point for the same. The D1 weighs about 80lb without drivers, and the drivers are Elemental Designs 11kv2. A fully loaded cabinet is well over 200lbs.

Yes, materials cost is much less. However, after you build the first three or four cabinets and figure out how to make the cabinets well the cost does go up. We call that “value added”.

We hit 119dB at 21Hz, 138dB at 53Hz, 148dB at 76Hz and the limit was the 2500W amp shutting down. More power would get a +3dB bump but more than that and you’d have to run PA amps off dedicated 240V circuits. In my experience almost no one has actually experienced 110dB at 20Hz in a room. In a car, not really too much of a problem.

At lower SPL the sound is definitely different from a single-driver sub. Each driver stays pretty much at the neutral position, which means very low distortion.

]]> By: Toolmonger » Blog Archive » How-To: Cut Angles With A Circular Saw http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264994 Toolmonger » Blog Archive » How-To: Cut Angles With A Circular Saw Fri, 28 Mar 2008 17:55:17 +0000 http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264994 [...] This Dodecasub makes a great DIY project for a Toolmonger, but cutting the angles can be a problem. After reading this post on the All-In-One Clamp, and this post on the MilesCraft Saw Guide, I still had no solution for how to cut long, straight lines that’re at odd angles to the edge of a board. A table saw with the guide set at an angle will do the trick, but here’s a way to manage it if your shop hasn’t grown that big yet. [...] [...] This Dodecasub makes a great DIY project for a Toolmonger, but cutting the angles can be a problem. After reading this post on the All-In-One Clamp, and this post on the MilesCraft Saw Guide, I still had no solution for how to cut long, straight lines that’re at odd angles to the edge of a board. A table saw with the guide set at an angle will do the trick, but here’s a way to manage it if your shop hasn’t grown that big yet. [...]

]]> By: ToolFreak http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264601 ToolFreak Fri, 28 Mar 2008 03:18:05 +0000 http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264601 $2,500? Probably an ok deal, but I'd bet it could be built for much less with a few sheets of MDF and 10 subs. Would suck for space, though. I'd rather just have a 12" in each corner of the room, or even a well-placed pair. $2,500? Probably an ok deal, but I’d bet it could be built for much less with a few sheets of MDF and 10 subs. Would suck for space, though. I’d rather just have a 12″ in each corner of the room, or even a well-placed pair.

]]> By: Kurt Schwind http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264336 Kurt Schwind Thu, 27 Mar 2008 18:12:18 +0000 http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264336 That looks awesome. I wonder how it sounds. That looks awesome. I wonder how it sounds.

]]> By: Michael Zbyszynski http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264323 Michael Zbyszynski Thu, 27 Mar 2008 17:48:09 +0000 http://toolmonger.com/2008/03/27/its-just-cool-dodecasub/#comment-264323 This is similar: http://www.instructables.com/id/Low-cost-Spherical-Speaker-Array/ and this http://www.electrotap.com/hemisphere/history.shtml This is similar:

http://www.instructables.com/id/Low-cost-Spherical-Speaker-Array/

and this

http://www.electrotap.com/hemisphere/history.shtml

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