I feel it would be helpful to understand playing in stereo as applied to keyboards.

Two different signals amplified separately. Panning or degree of panning refers to how the instrument is has been set up. A trumpet for instance may be sounding from the left speaker and not the right, or it may be 40% on the right and 60% on the left or they 50% to each side. Normally the purpose for panning in a stereo mode is to capture the same sound you would hear if you were standing in front of the band. Stereo will make the sound more realistic. If you were standing on the left side of the speakers you would hear what you would hear if you were standing on the left side of the band. Stereo is sometimes used for a desire effect; it can give an effect of an instrument traveling from one speaker to the other, a moving effect.

Having said all that what happens if I do not wish to play in stereo or if I do not have a stereo amplifier as in the Bose compact amplifier? For this reason most keyboards have an R/L output. This output combines both sides of the stereo into one output, right and left sides are combined they are one.

When you use a Y wire to connect right and left to a (mono) amplified sub you are doing what the manufacturer has already done with their mono (R/L) output.

John C.

Right John
It is summed(L&R) to mono.

Thank you for your explanation of 'stereo' sound John C.

This subject came up at our Club recently as someone had seen the new Bose being used at the local Organ Club but he couldn't explain how it worked without speakers. Although I had some idea, as a few years ago I used 'amplified speakers' which were good but I couldn't explain how they worked, let alone the Bose, so I will pass on your detailed explanation to our members at the next meeting.

Audrey

It’s always best to use the mono output provided by the manufacture to connect to a mono sound system, as if you use a Y lead you sometimes get phase anomaly’s when playing Stereo sampled sounds. (The manufactures mono outputs designed to prevent this from happening)

Bill

So thats mean I will have to choose between the main out left or right Because on the KN7000 there is no mono R/L+
like the others keyboards
ON the KN7000
Main out
L and R

Wrong, Sorry
On the back of the keyboard you will find R and L and inbetween them you will find MONO -- meaning one combining both sides R and L. (R and Mono are the same impute)

John C.

Well your right John
KN7000 =main out R and L
But the R is R/mono
Thats mean that I will plug only one jack in the output R/mono and connect to the input sub?
Thanks John

One jack in the output that is second from the left marked MONO.

thanks Bernie everything is working good