[78-L] i-phone horn amplifier

[busterdog@Mac.com]

Check Baumbach's ampli-phone site for the results of the acoustical testing.  The guy did his homework.

On Nov 20, 2011, at 7:59 AM, Michael Shoshani <mshoshani at sbcglobal.net> wrote:

> On Sat, 2011-11-19 at 13:24 -0700, Michael Biel wrote:
>> From: Mike Daley <mikedaley at gmail.com>
>>> Then there's Michael Cumella's (he of the Antique Phonograph Program on
>>> WFMU) iPhonograph:   http://www.michaelcumella.com/ip/
>> 
>> In the early 20s there were a number of devices which enabled radio
>> users to attach their headphones to their phonograph tone arm.  They
>> didn't supply the horn -- you used the one already on your phonograph. 
>> This one is similar, and instead of using the small Gem-size horn he
>> supplies, you could put the nipple of the plastic device onto your
>> phonograph arm after removing the reproducer. 
> 
> The Gem-size horn seems inefficient, at casual glance. Its size seems to
> be about the scale of those miniature talking machines that were
> designed to fold up and be carried about.  And the taper resembles a
> recording horn - which had no flare - rather than a reproducing horn.
> 
> The Baumbach instrument looks better to me; my only hope is that the
> plastic is stiff enough not to cause spurious resonances. I'd love to
> see one of those for my HTC Desire Android device, which has a tiny
> speaker the size of a dog's toenail located on the back near the top.
> 
> MS
> 
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