Leslie Speaker Box - Projects - Audio Artillery

Leslie Speaker Box

  1. Intro
  2. Building the Box
  3. Wiring
  4. Finished
  5. Sound Demo

1: Intro

The really nice guy I bought my Fender pedal steel from threw this Leslie rotating speaker module in for free. I'm unsure what the module is. I'm pretty sure it was part of an organ or something. Has a 15" drum driven by an 8" Jensen C8R speaker.

(click for full size)

(click for full size)

The motor and belt work fine so I figured I'd wrap a box around it so it's a little more usable.


2: Building the Box

Nothing fancy here, 3/4" panels from the local big box and glued together. The bottom is held on with screws and the Leslie module is bolted to that bottom piece, so it can be take apart for servicing.

(click for full size)

(click for full size)

The box measures roughly 20" x 18" x 12". It's pretty big. The whole thing weighs around 40 pounds


3: Wiring

My uncle suggested making this variable speed and I just happened to have a cheap solid state motor speed controller lying around. I don't know much about how these work. I think they PWM the AC signal. Works fine from about 3/4 up to full. I have to turn it up to nearly full to get the motor spinning but once it's moving I can dial it back quite a bit.

(click for full size)

I don't know the speed range I'm seeing here, my best guess is 100 RPM to 400 RPM.


4: Finished

I used Helmsman Spar urethane to finish this off with. I don't know much about it but it was easy to apply. It should at least keep the greasy fingerprints of studio goons from getting into the bare wood.

(click for full size)

(click for full size)


5: Sound Demo

I did a quick stereo recording to show what this thing sounds like:

Sound clip

I recorded this with a baritone Telecaster into a Firefly amplifier which output directly into the Leslie box. No effects were used.