"Norman Schwartz" wrote in message


"Arny Krueger" wrote in message
...
I did a little research and came up with the following:

Radio Shack part number 330-1109 3-Way Headphone Volume Booster. This
device runs off of 2 AA cells and provides 3 amplifier headphone
jacks. I ran some measurements on it and find that it has
approximately 6 dB gain,
0.003% THD @ 1 KHz full output, approximately 90 dB SNR and frequency
response 20-20 KHz +0, - 0.3 dB. It sells for the princely sum of
$22.95.


IME the best thing concerning the purchase of any Radio Shack branded
product is its no questions asked money back guarantee. (However with
the cost of gas these days it may not turn out to be a good thing at
all.)

If you actually heard the 330-1109, which appears to be a black-cased clone
of a product known as the "Boostaroo", you might give it a little more
credit than that. I'm thinking that a couple of dowel-based battery
simulators could mate it to a 6 volt DC wall wart for something with even
more punch.

BTW, RS does mail order.

http://www.radioshack.com/product.as...gory%5Fname=&p
roduct%5Fid=33%2D1109

In my ongoing search for quality personal listening devices, I just picked
up a pair of Shure E2's which I am investigating as an alternative to Sony
MDR-EX-70/71 earbuds.

MDR EX-71 are 16 ohms with 100 dB/mW sensitivity. Strong bass and strong,
rough treble but tolerable to my ears with smooth source material. Some
would say too just too much treble. Street price $40-50

Shure E2 are 16 ohms with 105 dB/mW sensitivity. Less bass and treble, but
smoother-sounding to my ears. Street price $80-90