Brenda Ann wrote:
--
Say no to institutionalized interference.
Just say NO to HD/IBOC!

Always good to limit one's exposure to overly loud sounds.. but one must
also remember that there is natural loss of high frequencies as we age.
Teenagers are taking advantage of this fact now with their 17KHz ringtone,
which the average person over 30 cannot hear.
http://graphics10.nytimes.com/images...ng-graphic.gif

In my case I road a motorcycle for 25 years and that didn't help.

Given that I always have several receivers running, and am constantly
testing
new everythings, detectors, filters amplifiers etc, I have managed to
connect
to a receiver that is running way too high an audio level several
times. And
the two worst events are when the people next door use their food
blender,
a noise source from hell, and when an amplifier that had been stable
for years
decided to turn into a loud CPO. 5 Watts of audio is a little loud via
the
headphones.

I also use something similar with my Minimus 7 speakers after blowing a
"woofer", somehow a 4" driver just doesn't feel like a woofer, when I
got a
little distracted and fed 40W of white noise into it. It was only
painfull for a
moment.

Years ago a friend got the bright idea to connect his El Cheapo Tandy
stereo headset to his Marshall guitar amp. He didn't know that the
typical HiFi has a ~200 ohm resistor in series so he fired up the amp,
put the phones on and played a lick. Called me to complain about
how low the volume was. I went over and found the back of the
earphones discolored from the heat of the fried little speakers. He
was very lucky, God does sometimes look out for fools and children.
His amp was rated at something like 400W. And it had 4 pairs of
push pull output tubes.

I can remember what TV horizontal output transformers sounded like,
from maybe 25 years ago. I don't know if they are still as noisy. A
local
swanky clothing store had egg frier ultrasonic intrusoin detector that
used to hurt when I walked in. I dpn't miss 15K and up but I really
miss
the 8 to 10K range.

Terry