AP-21 Line Out level

[rendoman]

Hi all

Just tried to use the line out (Celviano ap-21) with my audio system. It seems that the output voltage is not high enough, even at full volume position. I found also that the internal speakers of the keyboard are still active when the line connected. Probably I missed something in user guide, maybe some button to press to choose the right option. 

I didn't checked with scope the rms output, that should be 2v rms, 20k impedance, the Behringer deq 2496 has similar imp and fairly high preamp board.

Any idea of a possible solution?

[Brad Saucier]

Have you tried plugging the headphones jack (with an adapter or such) on the piano?  Some of the older models needs that done in order to switch the line outputs to the appropriate output level and turn off the internal speakers.   

[rendoman]

Thank you, going to try soon!

 

[rendoman]

It seems it's necessary to plug a jack in headphone sockets to mute the internal speakers and activate the lineout. Pretty impressive, as expected, the performance in bass range, considering the drivers installed in celviano, mids and highs are not so bad.