transmission line speakers are not difficult to build and i suspect they would be better for a ambisonic system than reflex speakers, for almost thirty years now i had a pair of 'miniline' transmission line speakers published in HiFiNews (and i think designed by P Atkinson) they use KEF B110 and MK8s but one can use more modern 5 1/2 speakers. i have built myself an eight speaker system using 3 1/2 vifas in sealed boxes, but my kefs sound very much better. i will do eight identical transmission line speakers when i have lots of money!
umashankar i have published my poems. read (or buy) at http://stores.lulu.com/umashankar > Date: Mon, 9 May 2011 20:54:21 -0400 > From: m...@hacklava.net > To: sursound@music.vt.edu > Subject: Re: [Sursound] Speaker configs + subwoofers > > > I found very little information about domestic Ambisonic speakers > setups. All I know is that it's better to use the same speakers and > amplifiers for the whole setup... I adopted the layout proposed by > Bo-Erik Sandholm (10 speakers), and now I have to find the right > speakers. > > Here's some random thoughts (comments are welcome): > > - Speaker design really is an art form; I can't build very good > speakers myself, so eventually I will buy two for my main stereo > system (and they will sound much better than they look). > > - I can build "good enough" speakers based on tutorials and > software. I did it and it's worth the effort. Bass-reflex enclosures > are easier to design and build than quarter-wave enclosures. > > - The frequency response of some good full-range drivers is about > 70Hz-20Khz. They are perfect for near-field listening, and probably > appropriate for a small Ambisonic setup. > > - For Ambisonic reproduction in a small room, I can't afford to buy or > build fancy speakers (like quarter-wave), but I can build many (10+) > speakers using full-range drivers in sealed enclosures. > > - I learned that it's possible to use subwoofers with Ambisonic; but a > minimum of four subwoofers are required with a dedicated FOA decoder. > That's a reason why I'd like to build small enclosures for small > drivers with a limited bass response instead of larger enclosures > with bass extension (either bass-reflex or quarter-wave). > > - Bass reproduction is important for directional cues. It is influenced > by the room response (or modes) and the placement of the subwoofers > (more than their size and quality). > > - Digital room correction and EQ are useful tools; we should use them > instead of looking for speakers with the "best" frequency response. > > Is there any web site (article, book) on how to build speakers > specifically for Ambisonic reproduction? > > -- > Marc > > Mon, 09 May 2011 23:24:17 +0100, > Gerard Lardner <glard...@iol.ie> : > > > There's also the Yahoo group Quarter-Wave > > (http://tech.groups.yahoo.com/group/quarter-wave/), where there is > > discussion of loudspeaker design, and the related website Quarter > > Wavelength Loudspeaker Design (http://www.quarter-wave.com/) where > > there is Mathcad software for loudspeaker design. Mostly for > > transmission-line designs. Seems to be good; but I haven't built any > > yet myself. > > > > Gerard Lardner > > > > > > On 09/05/2011 07:12, Bo-Erik Sandholm wrote: > > > > > > A bit out of topic but if anyone else is into building their own > > > speaker cabinets. Let me point you to a document that is very good > > > in explaining the design choices in a cabinet for the bass > > > frequencies. > > > > > > http://www.sonicdesign.se/optimum.html > > > > > > Regards > > > Bo-Erik > > > > > > -----Original Message----- > > >> From: sursound-boun...@music.vt.edu > > >> [mailto:sursound-boun...@music.vt.edu] On Behalf Of Bo-Erik > > >> Sandholm > > > Sent: den 4 maj 2011 13:48 > > > To: Surround Sound discussion group > > > Subject: Re: [Sursound] Minim AD7 for sale - Speaker configs. > > > > > > >From > > >> http://en.wikipedia.org/wiki/Sound_localization#Evaluation_for_low_freq > > >> uencies > > > Evaluation for low frequencies > > > > > > For frequencies below 800 Hz, the dimensions of the head (ear > > > distance 21.5 cm, corresponding to an interaural time delay of 625 > > > µs), are smaller than the half wavelength of the sound waves. So > > > the auditory system can determine phase delays between both ears > > > without confusion. Interaural level differences are very low in > > > this frequency range, especially below about 200 Hz, so a precise > > > evaluation of the input direction is nearly impossible on the basis > > > of level differences alone. As the frequency drops below 80 Hz it > > > becomes difficult or impossible to use either time difference or > > > level difference to determine a sound's lateral source, because the > > > phase difference between the ears becomes too small for a > > > directional evaluation. > > > > > _______________________________________________ > > 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/20110510/fa73d830/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
