SO I came up with a plan last night..or the night before, I can't remember.
Either way, it's gonna be fun hehe.
Ingredience;
Stainless steel spring (can make at work)
Stainless brackets to mount the spring (can make at work)
some wood
Two speakers (one driven)
and some tooth picks.
Mount the spring with as much tension as desired in between the brackets (about 35 - 40 cm apart).
Mount th speakers at either end of the spring mounts.
hot glue, or attach some how, the tooth picks to the cones of both speakers.
These are to go through small holes in the spring mounts.
attach the other end of the tooth picks to the spring itself (there should be NO tension on the cone at any sage during this process).
Modify the speaker outs and ins to hook up with your pedals.
When you play it will vibrate the cones in the driven speaker, which will vibrate down the spring, until it hits the opposite speaker.
Because a speaker is just a microphone, it will (by moving the cone of the passive speaker) create current inside the speaker (no unlike that created inside a guitar pick up) and send a signal out.
This is how to create a true spring reverb.
The diagram below is my version.
I haven't started construction of it yet, but after much thought, I predict that instead of this being a pure spring reverb, it will probably produce more of a slow attack delay verb sound, due to the positioning of the speakers (and the direction of the vibrations).

Feel free to copy this, and tell me how it goes (once again you can email on the sitemail address in red at the top right).
Enjoy
Jonny.
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