Volume Settings fo Leslie 145 & Combo Pre-amp Pedal

[Guest]

Hey Everyone,

I am new to the Organ Forum! As well as a proud new owner of a Leslie 145! I have some basic questions about volume settings..

KORG CX-3>Leslie Combo Pre-amp>Leslie 145

As of right now, I have the volume of the Leslie itself at 9. The combo pre amp is at 6

Everything sounds fine except the lowest register, when using the low end for a slide for example, will cause the low end of the Leslie to "rumble".
I dialed the Leslie back to 6 and was still causing the same affect.

I only had out the 8' drawbar as well. So Ultimately wondering what the best way to scoop out the low end is to prevent the rumble.
Should I keep the Leslie on 9 and adjust the sounds on my organ?

Any advice would be appreciated! Thanks!

[geoelectro]

Usually the more critical volume adjustment is between the keyboard and the preamp. This is because the preamp has a fairly sensitive input that can be easily over driven. So either lowering the keyboard volume or the input volume of the preamp so no distortion occurs at the highest volume. Adjusting it at either the keyboard or preamp makes no difference to the preamp. I'm not familiar with the CX-3 so I don't know if running it full volume can possibly over drive its output. Easy to test though.

The Leslie volume is usually set for the over all volume in the room. I believe a preamp may be able to over drive the Leslie input but it would be very loud at that point.

Could the rumble you hear be normal? Again the CX-3 may have that as a normal part of its sound. Perhaps trying the keyboard with headphones would verify that. A rumble could also be a rattle or something loose in the Leslie. It could be a bad 15" woofer. A problem with the amp may be causing it.

Try the keyboard through a different sound system to confirm the rumble is not part of the keyboards sound.
Try the Leslie on another product to see if the rumble is coming from the Leslie.
Try lowering the preamp input level and compensating with a higher Leslie level.
Good luck!

Geo