agitato Posted August 12, 2013 Share Posted August 12, 2013 In a digital piano,(or any keyboard,for that matter), what's the difference between a line out, and a headphone out? Also,could a headphone out, be used if no line out is available, to go into a keyboard amp or powered speaker? Link to comment Share on other sites More sharing options...
FedzKeyz Posted August 12, 2013 Share Posted August 12, 2013 As I am not an electrical engineer, you may want a second opinion, but you can plug a headphone output into a keyboard amp or powered speaker without problem. Line Outs expect a high impedance load, so don't expect to deliver any significant current. Headphone outs expect lower impedance, so are capable of delivering more current (power). An additional amplifier is required to provide the additional power, so headphone outs are likely to be a little more noisy than line outs. Yamaha CP4 Stage Kurzweil PC361 Link to comment Share on other sites More sharing options...
ITGITC Posted August 12, 2013 Share Posted August 12, 2013 The manual in Kurzweil documentation states that it's fine to use the headphone out into a line input: Audio The PC2 has a headphone jack, which carries the same signal as the main outputs (that's true whether you're using stereo or mono output). The headphone jack accepts a standard 1/4-inch stereo plug, and is compatible with nearly all types of headphones. Plugging into the headphones jack does not mute the other audio outputs. You can also use the headphone jack as an unbalanced stereo line-level output. Just connect a stereo cable from the headphone jack to a stereo input on your mixer or sound system. If you have only unbalanced inputs to your sound system, you'll get better audio quality using the headphone jack. ========== You should use a TRS (stereo) plug with the headphone jack and take the signal from either the left or right - or go stereo. If you use only the left or right signal, change the parameter in the machine from stereo to mono. Good luck! Tom "Music expresses that which cannot be put into words and that which cannot remain silent." - Victor Hugo Link to comment Share on other sites More sharing options...
J. Dan Posted August 12, 2013 Share Posted August 12, 2013 As I am not an electrical engineer, you may want a second opinion, but you can plug a headphone output into a keyboard amp or powered speaker without problem. Line Outs expect a high impedance load, so don't expect to deliver any significant current. Headphone outs expect lower impedance, so are capable of delivering more current (power). An additional amplifier is required to provide the additional power, so headphone outs are likely to be a little more noisy than line outs. For not being an electrical engineer, you gave a pretty good answer. Signed, an Electrical Engineer Dan Acoustic/Electric stringed instruments ranging from 4 to 230 strings, hammered, picked, fingered, slapped, and plucked. Analog and Digital Electronic instruments, reeds, and throat/mouth. Link to comment Share on other sites More sharing options...
Theo Verelst Posted August 12, 2013 Share Posted August 12, 2013 Agreed. Probably the headphone out will distort the signal more (and different), and of course it isn't balanced, and the ground of it may connect with more hum/rattle. Also the signal level of a +4dB pro level line out may not work great with headphone out, but it certainly should work and not blow anything up. T Link to comment Share on other sites More sharing options...
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