I tried to duplicate the Echoplex by monkeying around with an old, portable reel-to-reel tape recorder. I don’t remember what I soldered and to where, but it worked! And sounded completely like crap!
The Leslie was made to be used with any organ, but depending on the particular model, it can require a special connector. I know the G37 has a regular 1/4" input.
I’m not aware of that ever being an option, but there are models with separate motors for the tweeter and woofers. I suppose you could always modify it and give you separate controls for them.
They spin at different rates because of their mass apparently. The Ferrofish has controls for each, allowing you to set the horn at a faster rate to properly emulate the real thing.
Can you split the kb, and have the ferrofish play one half and the crumar play
the other ?
I’m sure it should work but I can’t think how !
Now I’ll have to fiddle around with that. The Crumar has the best Rhodes sound out there, so it would be pretty neat to have Hammond on one half and Rhodes on the other.
It might work.
I had a look around, and I don’t think it’s possible with the Crumar. May be
possible on other kbs.
(You could always buy a second cheapo kb with midi out from FB market
place or Craigslist or something to control the ferrofish !)
scabpicker, Thanks for the information. A fascinating speaker system.
That would work, but it’d be like a dual manual organ, kind of. If your desire is to have it all in one keyboard, I’d suggest a good one, not some random one. I know my Artruria Keystep Pro can do splits, but that’s a lot more than just a MIDI controller (in some ways, it’s more advanced than the sequencer in my Digitakt), and woah, you’d better like mini keys (I have small hands, it’s fine for me). You could put all your keyboard parts for both keyboards into its sequencer and just play the bass live, if you’re into that. But the non-pro Keystep can’t do splits. Either way, you’re now toting around more than just the Crumar and the Ferrofish module. How much does the Crumar weigh, BTW?
NP at all. They’re a weird speaker system. I should probably try to buy my guitarist’s Leslie. It’s a portable one, finished in Tolex. He’s not using it, after all, 
Barry Morgan from The World Of Organs
Thanks guys. For now this is simply me putting together the awesome 70’s music machine, so no need for anything more. If I want Hammond, then it’s gonna play Hammond, If I want Rhodes or Wurli, use the Crumar’s output.
One thing I would have liked on the Ferrofish would have been a pair of balanced outputs. They have a single stereo output jack that needs a Y adapter and a stereo line-to-XLR box to get the signal to the house board. The Crumar already has dual balanced outputs, albeit as TRS jacks, so all one needs is a pair of TRS-to-XLR cables.
The line-to-XLR box does me an extra favor: It allows me to run a pass-through line output to a small bass amp at my feet. At our place it is not unusual for my IEMs to stop working altogether, so having a small personal monitor is my lifeline.
ETA: scabpicker, I think you mentioned adding this to your short list. Definitely. It is a tidy small dense very well built chunk of German engineering. All of the knobs and sliders are perfect, and it really does give great control over the Hammond sound. I doubt it would let you down.