I did mention 'hard hats' in my original post. But the point bears emphasising more explicitly than my whimsy. Thanks Dave (and Peter).
We _do_ use safety 'chains' .. though some non-rattling evolution of the idea. (On which note: lighting stands are already littered with rattling elements compared with mic. stands:) We have also moulded a loud speaker base, and now have a Silastic (elastomer) positive of a speaker base from which we can make troughed wedges . . . but even so would still use safety chains (with or without a hard hat ;-)>. The problem with sandbagging/weighting the base is --as ever-- portabilty. Three dimensional rigs just aren't fun to transport (or set up with the angle (elevation, that is) measuring and bespoke matrices ...). Michael > For extra security for high speakers, we add luggage straps > > Dr Peter Lennox > School of Technology > University of Derby, UK > tel: 01332 593155 > e: p.len...@derby.ac.uk > > -----Original Message----- > From: sursound-boun...@music.vt.edu [mailto:sursound-boun...@music.vt.edu] > On Behalf Of Dave Malham > Sent: 01 July 2011 09:34 > To: Surround Sound discussion group > Subject: Re: [Sursound] Portable ambisonics setup, or "how do you mount > speakers on tubes?" > > > > On 30/06/2011 20:42, Michael Chapman wrote: >> We just made 'bird tables' to put the top speakers on. About >> 200 mm of broom handle to slot into the lighting stand, and >> a approx 15-20 mm thick horizontal shelf (the right sized >> drill and the two glue together with no clamping). >> I said it was a quick expt'l project, but was over-ruled and >> the bird-tables were painted black ... must admit it is an >> enormous aesthetic improvement. >> > Whoaa! Be very careful if you are using a system like this - many years > ago I was working with Chris > Richards from Cepiar, trying out some decoder stuff here at York. He > brought with him a system > exactly like this on which we mounted some of my (then brand new) > Wharfedale Diamond V's at almost 4 > metres height. What Chris forgot to mention was that he _hadn't_ fixed the > speakers down in any > other way than their weight. I went to move one of the stands and the > speaker fell off, grazed my > right shoulder and smashed its corner in on the floor. If it had been 50 > mm further over, I doubt if > I would have been interested in height information - or anything else - > any more :-( > > For what it's worth, I used, on the Wharefedales, Tandy (Radio Shack > anywhere other than the UK) > Universal wall mounts screwed and glued to the back of the speakers. They > have a four hole wall > mounting plate. I made up some U bolts with threaded rod the legs of which > fit through the holes in > the plate. These then slide over stands made (by me) of 25mm square steel > tube which have a cross > shaped (removable) base. To ensure safety and stability, I have a pile of > concrete blocks I keep > specifically to weight down the bases - stage weights would be nicer but > I've only managed to > scrounge a couple of those...the blocks are way cheaper. You can use > Speedframe > (http://www.richardsonsuk.co.uk/product.aspx?p=47&gclid=CJS8zNLd36kCFUEa4Qod-Hc5Xg) > to make up this > sort of stand, but being a good Yorkshireman, I just got a local company > to cut up standard 25mm > square tubing, which was much cheaper (though not as nicely finished) as > the proper stuff and the > only Speedframe bits I bought where the 5 way corner connectors to make up > the bases. > > Dave > > PS Richard (Lee) - I'm pleased to report that that speaker is still > working...I think I showed great > restraint in not dumping it in the bin after it tried to kill me like that > :-) > > -- > These are my own views and may or may not be shared by my employer > /*********************************************************************/ > /* Dave Malham http://music.york.ac.uk/staff/research/dave-malham/ */ > /* Music Research Centre */ > /* Department of Music "http://music.york.ac.uk/"; */ > /* The University of York Phone 01904 432448 */ > /* Heslington Fax 01904 432450 */ > /* York YO10 5DD */ > /* UK 'Ambisonics - Component Imaging for Audio' */ > /* "http://www.york.ac.uk/inst/mustech/3d_audio/"; */ > /*********************************************************************/ > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > > _____________________________________________________________________ > The University of Derby has a published policy regarding email and > reserves the right to monitor email traffic. If you believe this email was > sent to you in error, please notify the sender and delete this email. > Please direct any concerns to info...@derby.ac.uk. > The policy is available here: http://www.derby.ac.uk/LIS/Email-Policy > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound > _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
