The Yamaha AN1x Synthesizer mailing list

Jeff’s answer was pretty good.  Here’s my try at it:

 

The danger is that each output needs to have a load equal to its needs.  A
see-saw with a fat kid on one side might launch the skinny kid into orbit.
So if you’ve got headphone levels of wattage (voltage times current) it is
meant to push the heavy load of the 32 ohm headphone speakers.  Now the
confusing thing is the impedance.  As the impedance DECREASES the wattage
necessary to do the work INCREASES.  So the 32 ohm impedance at the
headphone jack has a lot of wattage available.  On the other jacks, the line
levels, the impedance is (maybe this helps, warning- technical:
http://artsites.ucsc.edu/EMS/music/tech_background/TE-15/teces_15.html)
about 3000 ohms.  So you need much less wattage to get the signal into the
next device.  Putting headphone levels into line level inputs can literally
burn them up due to the excess.  If you could read the schematic, you would
see that the line level signals are sent to an extra stage of amplification
to produce the headphone outputs.  So stick with what balances the impedance
see-saw.

 

Ed²

 

  _____  

From: AN1x-list@yahoogroups.com [mailto:AN1x-list@yahoogroups.com] On Behalf
Of gravkitty
Sent: Saturday, February 20, 2010 6:48 PM
To: AN1x-list@yahoogroups.com
Subject: [AN1x] (Headphone/LineOuts) Confused as to why...

 

  

Official Question 1:
Why is the headphone output hotter than the actual line outs?

Official Question 2:
Are there any issues for prolonged use of the headphone outs for recording
in a home studio scenario? I never push any synth beyond 3/4 max volume.

Is there some, not in the manual, aspect/reasoning behind this? I don't
understand, it seems to me(IMHO), it should be the reverse. I suppose in a
live sound application, the line outs would go to an amp/pa which would take
care of the issue. I'm just a guy in the bedroom though.

I'm trying really hard to stay on track with FAWM.org, and I noticed
something I recorded (using an1x, sh32 and an200) that the AN200 was way
lighter than it should have been. This caused me to doubt all the cables and
connections, so I rigorously unplugged everything. Found the best cables I
have and ran thru all the equipment 'outs', all the mixer 'ins', in order to
get a birds eye view on the situation.

I have the AN1X midi out to the AN-200 then SH-32(good combo for a broad
expansive sound), My Pk-6 is just going straight into the mixer(Yamaha
MG10/2). The an1x, an200 and sh32 are all going into there own channels.
From there, to a recorder.

I gotta say, the action on the AN1X keyboard is so awesome, it gets my best
vote (the Ion gets worst)

Sorry if this is rambling...



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