On 2002.10.17 21:18 linuxmedia4(a)netscape.net wrote:
Greetings,
I just bought a new system. It has integrated sound on the Mother
Board. There is a jack marked "spk" (obviously the speaker jack). But
the manual refers to that jack as "line-out" I was always under the
impression (just an assumption) that "line-out" and the speaker jack
put out completly different voltage levels (and we know how dangerous
it could be to plug things into the wrong voltage levels).
Are the standard speaker jacks indeed "line level"?
There's several possiblities that I can think of:
1. The standard "speaker out" jack complies to the "line level"
standard
2. Since it's a costom made computer, the jack is incorrectly marked
and its actually a line out jack. (after all, the VGA port is marked
as "COM2")
3. Since the manual covers several versions of their Mother
board, it's actually a different interface that it's referring to (I've
run into this with the manual before).
I'm actually hoping to find out that the speaker out jack complies to
the line level standard. This way I can use the speaker out for line
level devices.
Why don't you measure it with a voltage-meter? It should be around 1.5-2 V
for a line out device. Most of the time it's a speaker out connector that
just delivers line voltage. Lots of the small speakers are 4Ohm, which
means that with the line level voltage you get 1W rms power. That's enough
for most computer bleeps.
Remco Poelstra