I'm with Umashankar on this - digital T-Amps are very cool. I helped assemble a bunch of hemispherical speakers for the Princeton Laptop Orchestra using these, and they work quite well:
http://diyparadise.com/shop/index.php?main_page=product_reviews_info&products_id=67&reviews_id=9 You can buy larger versions with 8 channels (and maybe more?) on one board, at a fraction of the weight of old-school amps. cheers, j On Jun 30, 2011, at 11:50 AM, umashankar mantravadi wrote: > > i would agree with that (arent there too many wires already?) but i found a > cheaper solution in chinese made digital amplifier cards. 50 dollars > including shipping for four channels! you need to build a box etc of course. > there are switched mode power supplies too. (search for sure electronics on > ebay) i use light weight home made speakers with a metal hook on the back. > just now they hang on walls, but can easily hook them up otherways. i would > make a ring and hook assembly which can slide up the stands and locked in > place. umashankar > > i have published my poems. read (or buy) at http://stores.lulu.com/umashankar >> Date: Thu, 30 Jun 2011 10:53:22 -0400 >> From: [email protected] >> To: [email protected] >> Subject: Re: [Sursound] Portable ambisonics setup, or "how do you mount >> speakers on tubes?" >> >> I don't have an answer to your question. But i would consider using passive >> speakers and a separate amp setup. That will take some weight off your >> stands, and, the bigger advantage, you won't have to run power and and audio >> cables to every speaker location - just to the amp setup. Simple speaker >> wire (lamp cord) goes out to the speakers. >> >> we've been using this amp with some small behringer 1C monitors (JBL control >> 1 knock offs - more or less) for an inexpensive solution that performs >> surprisingly well (a bit lo-fi - especially the monitors): >> http://www.bhphotovideo.com/c/product/597468-REG/Pyle_Pro_PCA3_PCA3_Mini_2_x.html >> >> we have a bunch of stereo kits that can be combined for multichannel use or >> used separately. >> >> - >> >> something like this is more pro: >> Rane MA4 4-Channel, 4 x 100W Amplifier MA 4 B&H Photo >> Video<http://www.bhphotovideo.com/c/product/362083-REG/Rane_MA_4_MA4_4_Channel_4_x.html> >> >> and there are a lot of surround sound receivers that will do the trick >> nicely with 5 or even 7 channels of amplification in a single unit. Many >> even have calibration routines built in. But it's hard to find them with >> discreet analog input these days - I would look for that or be prepared to >> deal with getting a digital multichannel input to the receiver. >> >> jim >> >> On Thu, Jun 30, 2011 at 9:36 AM, Franck M. <[email protected]> wrote: >> >>> I'm designing a mid-size (8 to 12-ch) ambisonics setup, using small active >>> near-field studio monitors such as Fostex PM04, Focal CMS40, BM-5A...(the >>> exact model will depend on the funding I'll get for this project). >>> >>> As it is supposed to be "portable" (well, transportable would be a better >>> term) I'm planning to put the speakers on stands (such as lightning >>> roll-stands from Manfrotto) that can be easily folded and put in some car >>> (mine). >>> >>> For example, the 12 speakers setup would have 3 speakers per stand (floor, >>> mid, ceiling speakers), each stand being in the corner of the room or, >>> better, at the middle of each room side, in order to prevent that common >>> room-corner-ultra-bass-boom effect. The 8 channels setup is simply the cube >>> (or the "parallelepiped"), with no mid speaker. >>> >>> As some of you already may have built such fixed or portable setups, I was >>> wondering how you managed to fix the speakers to (vertical or horizontal) >>> tube stands or structures. For lights, they use tube clamps, but the weight >>> is not the same when it comes to active loudspeakers. Most small form factor >>> speakers have threaded mounting holes so you can put them on microphone >>> stands, so I was planning to use them, but I couldn't find the "missing >>> link" between the tube and the mounting holes... >>> >>> Thanks in advance for any tips! >>> >>> Frank >>> _______________________________________________ >>> Sursound mailing list >>> [email protected] >>> https://mail.music.vt.edu/mailman/listinfo/sursound >>> >> >> >> >> -- >> Jim Moses >> Technical Director/Lecturer >> Brown University Music Department and M.E.M.E. (Multimedia and Electronic >> Music Experiments) >> -------------- next part -------------- >> An HTML attachment was scrubbed... >> URL: >> <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110630/250da75c/attachment.html> >> _______________________________________________ >> Sursound mailing list >> [email protected] >> https://mail.music.vt.edu/mailman/listinfo/sursound > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > <https://mail.music.vt.edu/mailman/private/sursound/attachments/20110630/5bb0d26f/attachment.html> > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound > _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
