Thanks so much Marc, Carlie, & everyone. - matt
On Sun, Oct 20, 2013 at 8:11 PM, Marc Lavallée <m...@hacklava.net> wrote: > Matthew Palmer <palme...@mymail.vcu.edu> a écrit : > > I'm wondering if it (4 sets of Logitechs) can give me 3d > > gratification for a little over $200. I know I'm definitely > > sacrificing quality but it will take me ages to save up for a proper > > set-up. > > I don't understand what kind of amplifier would be needed though. > > Yes! 4 small speakers with one sub are enough as a starting point: > I suggest reading "Localization in Horizontal-Only Ambisonic Systems" : > http://www.ai.sri.com/ajh/ambisonics/BLaH1.pdf > > Use a square or rectangular configuration, and drive the sub with the W > ambisonic channel; you can use a multimedia 5.1 kit (with integrated > amplifiers), but the sub should be driven separately, not by a mix of > the 4 decoded speaker channels (that's my comprehension). > For un-amplified speakers, you can use cheap D-class amps. > > > I don't fully understand what cross-over frequency is (it sounds > > obvious though) but maybe by reducing the center channels from the > > set-up , I'd reduce the amount that is happening. > > I would not use the centre channel; there are experimental 5.1 decoders > but I never tried. The cross-over frequency is between the sub-woofer > and the satellites. Ambisonics works well at low frequencies in small > rooms, at least down to the Schroeder frequency (usually around 150Hz, > depending on your room size and acoustic treatment). That's why 300Hz > is a bit high, but it's not catastrophic. > > Ambisonics with height is possible with a "3D7.1" configuration (using > a 7.1 speaker kit). I yet have to try it. > > -- > Marc > > > On Sun, Oct 20, 2013 at 7:12 PM, Charlie Richmond > > <charlie....@gmail.com>wrote: > > > > > On Sun, Oct 20, 2013 at 3:59 PM, Marc Lavallée <m...@hacklava.net> > > > wrote: > > > > > > > > > > > What matters is rigidity; if a plastic enclosure is rigid > > > > enough (for its size), then it would sound the same than a hard > > > > wood enclosure. In the specific case of the Z506 model from > > > > Logitech, wooden enclosures for the satellites would make no > > > > difference; the drivers, the amps, and the enclosures are too > > > > small to shake. Only the sub-woofer enclosure is made of MDF, for > > > > a reason. > > > > > > > > So, why not using the Z506 5.1 kit from Logitech? "Multimedia" > > > > speakers are primarily designed as computer accessories; some are > > > > probably well made, excluding the one in the MoMA's permanent > > > > collection (unless aesthetic is the most important criteria). I > > > > wouldn't trust its sound quality; it's a bit small unless the > > > > listening distance is less than 2 meters, the centre speaker does > > > > not match the four other satellites, the centre speaker have 2 > > > > mids and the satellites have one mid and one tweeter, and the > > > > cross-over frequency for the sub-woofer is probably near 300Hz, > > > > which is a bit too high. For Ambisonics, I believe that better > > > > quality full-range or coaxial speakers, all matched, should be > > > > preferred. > > > > > > > > I would only such use small multimedia speakers for a very compact > > > > periphonic installation, along with 4 to 8 small sub-woofers for a > > > > supplemental horizontal or periphonic low frequency decoder. > > > > > > > > > > Agreed. That said, the Logitech self powered systems are generally > > > extremely well made and sound very good, imho. > > > > > > C-) > > > -------------- next part -------------- > > > An HTML attachment was scrubbed... > > > URL: < > > > > https://mail.music.vt.edu/mailman/private/sursound/attachments/20131020/73b9a2d1/attachment.html > > > > > > > _______________________________________________ > > > Sursound mailing list > > > Sursound@music.vt.edu > > > 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/20131020/2bfcc5f5/attachment.html > > > > _______________________________________________ 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 > -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20131020/1fc4770b/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
