Re: Attenuating headphone side of 1/8" jack

Using a standard 1/8 stereo headphone jack (http://tinyurl.com/yzqgv8)
is
it
possible to attenuate with a resistor the HEADPHONE output without
attenuating the speaker output. I know that I can plug the headphones
into
an attenuate or volume control, but don't want to do this.


Thanks


Yes its possible. The headphone output is separate from the speaker out
at
that jack. They share the common and usually the speakers are
disconnected
when the plug is inserted.
You may need to consider impedance matching to the phones. Can you say
a
little more about what you want to do and what equipment you have?

Tom


A little detail into what I am doing: The Mac G5 does not disconnect the
external speaker when you plug headphones into the headphone jack on the
front panel (I have confirmed this is a 'feature' in several
newsgroups).

My amplified speakers have a headphone jack that does disconnect the
speakers when used. The problem is that the headphone jack it is also
amplified making the headphones really loud. I would like to keep the
speaker setting set where it is comfortable and reduce the headphone
output
so it is not so loud when used.

Everyone in my family uses/likes different headphones and will be
plugging
in there own personal MP3 player headphones whew needed, so modifying
the
headphones is out of the question. I would like to avoid a volume
control
or external attenuator as it is just another thing not to be able to
find
when needed (and may also be forgotten to use). I would like to
internally
modify the jack to achieve this result.

Pinouts (I Think)

1 GND
2 R IN
3 R Speaker SW
4 L Speaker SW
5 L IN

http://tinyurl.com/yk2v2c ** Look at PN16-3155E **

Thanks



It may be as simple as this:
http://www.epanorama.net/circuits/headphone_attenuator.html
Try it.

Tom


Thanks


.

Relevant Pages