On 22/06/2011 22:37, Ralph Glasgal wrote:
I have tried the Bluetooth wireless Jambox with the iPad 2 running Hotto's
Ambiophonic RACE app. I have also used the app with the iLuv iPad docking
station. You can see pictures of both on the Ambiophonic website. You should
try this for yourselves since my opinion is naturally biased. Both speaker
systems produced a full width stage and positioning was relatively non-critical
compared to using these speakers for plain stereo.
The little Jambox has two one inch speakers four inches apart. Fortunately the RACE parameters are fully adjustable even for this kind of narrow spacing (+/- 5 degrees or so) and for the first time I needed (and was able) to use a delay setting of 45.4 microseconds and an attenuation of 1.9 dB. There may even be better settings which you can research. Of course you need to be within about a meter or less with such closely speakers so you are always listening in the near field to these very very directional speakers which may explain why the results are so gratifying.
I think the sound quality is better when it is used wired, and it can
play louder.
Having listened now on larger speakers, I really miss the loudness on
the Jambox and it sounds compressed.
The jambox up close - I tend to hold it against my chest, has a greater
range of distance in the image compared to the larger speakers.
It makes a good monitor for image quality but I will listen to music on
the LX5s which give more of a cross between 'you are there' and 'they
are here'.
Try a small barrier with the Jambox.
Since the Jambox and others coming are Bluetooth wireless, it is conceivable that a family or bunch of home theater enthusiasts could all hold their own Jamboxes and enjoy the full width stage with the clarity and depth that XTC brings while they all watch same large screen 3D TV. (The iPad does have an HDMI output if you want the normal surround digital audio rather than Bluetooth.) I still need to see whether it is actually possible to drive two or more Jamboxes with the single iPad Bluetooth source. But if this is really a popular application I am sure a Bluetooth hub can be designed and a wire daisy chain is also feasible. A major criticism of Ambiophonics and Ambisonics is their inability to provide the same stage for a roomful of people seated at random. IMAX years ago solved this problem in a similar fashion by providing off the ear speakers for each viewer. The Jambox costs about the same as some of the switching 3D glasses
being sold.
The iLuv has larger speakers and better bass and you can get further away from it but it is not wireless at the moment. I am awaiting a pair of Soundmatters to see if they will also work well this way but eventually there will be too many of these for me to try them all.
Using two Jamboxes, one front and one rear, one could have full-horizontal-plane surround, but for that you need something besides the present App like two miniambios, TacT, etc. although again the iPad HDMI output can provide the raw digitally encoded surround tracks extracted from downloaded movies and video.
Ralph Glasgal
www.ambiophonics.org
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