Wiring a Leslie 710 with non-Hammond organ

[mark.ledford]

Our church has a Baldwin C-630T, which is a 5-channel organ. Two manual channels, one pedal channel (subwoofer), and two "tone expander" channels, which are the manual channels basically run through a phase-shifter. I have those five channels run through speakers mounted in the sanctuary. But I have a possible opportunity to acquire two Leslie 710's. I know that Leslies are more for Hammond-type organs, but let me explain our needs/desires for this possible set up.

1. Our music is not "high church" music. The organ accompanies the piano, as the piano accompanies the singing. (If that makes sense.) There are a few times when we use the organ for special music, cantatas, etc, where we like it to sound as much like a pipe organ as it can. But we like to use the vibrato for a more "gospel" sound.

2. The vibrato on the organ is cheesy, and we would benefit from the Leslie in those situations.

3. When used in conjunction with the stationary speakers, I think the chorale speed would sound nice.

4. Because we already have stationary speakers, I'm not very concerned with the stationary channels of the Leslies.

5. If we cannot easily change the speed of the Leslies, I'm not very concerned about that.

So here is my question:
Could we connect the two manual channels to the rotary channels of the Leslies? Even if each Leslie handled only one of those manual channels? (Each Leslie would be wired directly to the organ, not "daisy-chained" to each other.)
I don't know much about the crossover system in these speakers, but because the low frequencies would not be sent to the Leslies, would I need to worry about that?
The organ has two sets of outputs: Main and Echo, which can be switched between Main, Echo, or both from the key desk. I currently have the stationary speakers on the main output, and would run the Leslies from the Echo outputs, so that the organist could change what speakers are being used.
I have studied the pinouts for 9-pin Leslies, and I know that I would need to power them from the Leslie connections. (The organ actually has switched line voltage for Baldwin tone cabinets that I could connect to.) So would I be able to simply tap into the ground/rotary channels, and then wire/switch the rotary speed accordingly?

[geoelectro]

Here's what I would consider.
Connect each organ manual output to each rotary input of the Leslies. (upper to one Leslie, lower to the other)
Then, connect the pedal output to both stationary channels of both Leslies.
In the Leslies, I would disconnect the stationary 6x9's so that channel would just handle the bass from the pedals.

Depending on how much physical separation there is between the Leslies, separating the manuals into each one "might" be an issue but with your Baldwin speakers still in there likely not. The volume of each Leslie can be adjusted so you could blend them in nicely.
I would definitely connect the switching so it could be operated from the organ. That circuit is very simple.

Geo