the three d printer is a little bit of frankenstein. a lot of the parts are from a chinese machine called ecubmaker. the dodecahedrn design is on thingiverse but i had to modify it to speakers i wanted to use = VIFA 3 inch full range available on madisound. i have also redesigned the brahma microphone to print on my 3d printer. there is a picture of that too. umashankar
here is a picture \\umashankar > Date: Sat, 31 Oct 2015 13:30:51 +0000 > From: augustineleu...@gmail.com > To: sursound@music.vt.edu > Subject: Re: [Sursound] 8 channels on 12 volts > > Fantastic ! What sort of 3d printer did you use or was it a router ? Your > own design of speaker ? > > On Saturday, 31 October 2015, umashankar manthravadi <umasha...@hotmail.com> > wrote: > > > my first use is to power a dodecahedron loudspeaker-three speakers to each > > amplifier. that way i will get more power out of 12 volts. i just finished > > 3dprinting the loudspeaker. > > > > i will build a portable 8 channel system with 3-inch speakers that i would > > like to take around for ambisonic demonstrations in colleges etc. > > > > i should check the specs for the ic.it is a single chip and the board > > looks well made - it says 50 watts per channel, but i would be happy with > > about 18watts into 4 ohms per channel. (it should be capable of that much - > > these are bridge outputs. > > > > umashankar > > > > > Date: Sat, 31 Oct 2015 10:42:43 +0000 > > > From: augustineleu...@gmail.com <javascript:;> > > > To: sursound@music.vt.edu <javascript:;> > > > Subject: Re: [Sursound] 8 channels on 12 volts > > > > > > Ooooh for me this is very interesting. Let us know how long it lasts for. > > > Let us know what material and what speakers ! What are you using this > > for ? > > > > > > On Saturday, 31 October 2015, umashankar manthravadi < > > umasha...@hotmail.com <javascript:;>> > > > wrote: > > > > > > > dear all > > > > there have been recent discussions on multichannel amplifiers. this > > is my > > > > solution. two cards providing 8 channels of amplification running on a > > > > lithium 12 volt battery ! (very low cost too, on aliexpress > > > > > > http://www.aliexpress.com/item/Free-Shipping-Amplifier-Board-TDA7850-4X50W-4-Channel-Car-Audio-Amplifier-Board-12V-AV-Interface/1331622462.html > > > > . > > > > i have not powered it up yet > > > > umashankar > > > > -------------- next part -------------- > > > > An HTML attachment was scrubbed... > > > > URL: < > > > > > > https://mail.music.vt.edu/mailman/private/sursound/attachments/20151031/aba8d359/attachment.html > > > > > > > > > -------------- next part -------------- > > > > A non-text attachment was scrubbed... > > > > Name: WP_20151031_10_55_06_Pro.jpg > > > > Type: image/jpeg > > > > Size: 1430143 bytes > > > > Desc: not available > > > > URL: < > > > > > > https://mail.music.vt.edu/mailman/private/sursound/attachments/20151031/aba8d359/attachment.jpg > > > > > > > > > _______________________________________________ > > > > Sursound mailing list > > > > Sursound@music.vt.edu <javascript:;> <javascript:;> > > > > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe > > here, > > > > edit account or options, view archives and so on. > > > > > > > > > > > > > -- > > > www.augustineleudar.com > > > -------------- next part -------------- > > > An HTML attachment was scrubbed... > > > URL: < > > https://mail.music.vt.edu/mailman/private/sursound/attachments/20151031/dfe8ebd2/attachment.html > > > > > > _______________________________________________ > > > Sursound mailing list > > > Sursound@music.vt.edu <javascript:;> > > > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > > edit account or options, view archives and so on. > > > > -------------- next part -------------- > > An HTML attachment was scrubbed... > > URL: < > > https://mail.music.vt.edu/mailman/private/sursound/attachments/20151031/77203aed/attachment.html > > > > > _______________________________________________ > > Sursound mailing list > > Sursound@music.vt.edu <javascript:;> > > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > > edit account or options, view archives and so on. > > > > > -- > www.augustineleudar.com > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20151031/7c2c0503/attachment.html> > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit > account or options, view archives and so on. -------------- next part -------------- An HTML attachment was scrubbed... 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