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Boominator build (UK)... |
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DJ-Dulux 
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Joined: 24 August 2009 Location: Kenilworth, UK Status: Offline Points: 378 |
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 Posted: 28 March 2015 at 9:25am |
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Parts have started to arrive, the speakers, battery and epoxy:
Eminence Basslite S2010  IMG_0557 by infoavcandy, on Flickrcoming in at 1.6kg Paudio PHT-407N  IMG_0553 by infoavcandy, on Flickrcoming in at 0.2kg West System Six10 Epoxy Adhesive  IMG_0561 by infoavcandy, on Flickrpbd 10Ah 12 V LifePo4 battery  IMG_0550 by infoavcandy, on Flickrcoming in at 1.5kg We are at around 8.7kg so far, aim is <20kg, which is going to the tight. Just a few cabling bit now, the stainless 316 grills and and cabinet which is out to quote at the moment. Dupe... Edited by DJ-Dulux - 01 April 2015 at 8:33pm |
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Dupe...
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lutkeveld
Young Croc 
Joined: 23 September 2013 Location: The Netherlands Status: Offline Points: 517 |
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Posted: 28 March 2015 at 9:38am |
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Awesome! How are you going to do the wood, CNC?
For a moment I thought this was a halfinator build A lightweight halfinator is still on my to do list, but those basslites, tweeters and MiniDSP aren't cheap.
Edited by lutkeveld - 28 March 2015 at 9:51am |
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DJ-Dulux
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Joined: 24 August 2009 Location: Kenilworth, UK Status: Offline Points: 378 |
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Posted: 28 March 2015 at 9:44am |
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Wood is going for CNC, actually making 2, a lightweight and a standard one for a mate, will be interesting to see quality difference and if the 10kg weight saving is worth the extra cost, standard looking at around 25kg compared to 15kg!
I have fully equipped acoustic lab so will be doing some tests on the things to quantify differences and to set up DSP. Will post the DSP files once done. Will lay down on the long side, 3 feet on bottom. Dupe... Edited by DJ-Dulux - 28 March 2015 at 9:47am |
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Dupe...
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DJ-Dulux
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Joined: 24 August 2009 Location: Kenilworth, UK Status: Offline Points: 378 |
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Posted: 31 March 2015 at 8:09pm |
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CAD finally complete:
Lightweight  image by infoavcandy, on FlickrStandard  image by infoavcandy, on FlickrJust waiting for wood now.... Dupe.... |
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Dupe...
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DJ-Dulux
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Joined: 24 August 2009 Location: Kenilworth, UK Status: Offline Points: 378 |
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Posted: 01 April 2015 at 8:31pm |
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Weight update...
So the model above is predicting that the cabinet be just over 11kg. Speakers and battery are measured at 8.7kg Total so far 20kg We have some fixings, epoxy and the electronics to add yet, so its going to be around 22kg in the end. Bit heavier than I wanted, but still OK. Dupe.... |
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Dupe...
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lutkeveld
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Joined: 23 September 2013 Location: The Netherlands Status: Offline Points: 517 |
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Posted: 01 April 2015 at 8:37pm |
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No way that that cabinet is 11kg. Which type of wood do you use? Should be closer to 3-4 kilos.
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Darkstar
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Joined: 08 October 2014 Location: Italy Status: Offline Points: 326 |
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Posted: 01 April 2015 at 8:48pm |
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Lol 25kg is the weight of an active stage monitor, that's quite impressive.
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Bass =/= Enough
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Saturnus
Old Croc 
Joined: 13 July 2010 Location: Copenhagen Status: Offline Points: 2025 |
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Posted: 01 April 2015 at 11:12pm |
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It's 19kgs on the dot with filmed birch plywood and with amps, drivers, wires and other electronics but without battery. And that's with HP10W drivers which are exactly 1kg more heavy each than the basslites. The PHT407N are 150 gram more than piezos each so total saved would be 3.4kg. I'd be very surprised if it weighs more than 16kg total still without battery.
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DJ-Dulux
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Joined: 24 August 2009 Location: Kenilworth, UK Status: Offline Points: 378 |
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Posted: 01 April 2015 at 11:47pm |
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We will see, we have struggled a bit to get the model to calculate so could be an error. However, we usually use steel parts and its very precise, we are assuming wood is 708kg/m3, this is what wisa quote.
If its lighter then great, 17.5kg would be ideal.... Dupe... Edited by DJ-Dulux - 01 April 2015 at 11:47pm |
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Dupe...
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Saturnus
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Posted: 02 April 2015 at 12:14am |
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Are you sure you have taken the cut outs into the equation? The cut outs account for nearly 1/3rd of the total volume of ply wood used... actually pretty much exactly 1/3rd.
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DJ-Dulux
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Posted: 03 April 2015 at 12:00pm |
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I think we have an explanation on the weight, essentially we have checked the model by using a reference 1m * 1m panel and it all calculates correctly.
The difference is in the density of the plywood, I had no idea it varied so much: Wisa Form Birch - 700kg/m^3 SyPly Film faced Birch - 665kg/m^3 Wisa Form Spruce - 500kg/m^3 Cheap ply - 460kg/m^3 These differences make a huge impact on weight: Wisa Form Birch - 11.5kg Wisa Form Spruce - 8kg Cheap ply - 7.4kg So does this explain the difference? This takes the Boominator from 17kg to 22kg, is spruce good enough, saves 3.5kg compared to birch? Dupe... Edited by DJ-Dulux - 08 April 2015 at 11:16am |
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Dupe...
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Saturnus
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Joined: 13 July 2010 Location: Copenhagen Status: Offline Points: 2025 |
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Posted: 03 April 2015 at 12:23pm |
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Problem with that calculation and assumption is that my original Boominator is built with WISA FORM BIRCH. So your calculations are simply incorrect.
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