New knob caps for Prophet-5/10/600, Pro-One etc

Painted vs new
Ugly old painted Prophet-5 cap (left). My brand new cap (right)

I bought a Prophet-5 where the black caps were painted black… it looked absolutely awful. Searching the web for replacement knobs (like I’m sure many of you Prophet owners have) only turned up extremely expensive old stuff, which usually was “out of stock” anyway. I did get hold of some original replacement knobs, but these were pretty scratchy and worn too.

I decided to fix this! I had a company re-manufacture the aluminum cap to the exact original dimensions. (I also looked into making the plastic knob part, but then I realized most people already have these and they usually look ok).

The old caps are easy to replace, they basically pop off with the help of a knife blade. There is a little dot of glue in there that doesn’t provide much resistance 🙂

Now, only the more high end SCI gear (Prophet-5, Prophet-10 etc) had the fancy knobs with aluminum caps. The more low end stuff (Pro-One, Prophet-600, Split-Eight etc) only had the plastic part of the knob, with a simple painted white indicator line. The best part is that now you can pimp these models too! Many vintage (80s) Sequential Circuits gear used the same plastic knobs, with this cap being the only difference. The T8 and some other machines used different wider and shorter knobs, and unfortunately my caps will not fit those.

The pic below shows two old Prophet-5 knobs, one with a silver cap, the other with a removed black cap. Next to those a Pro-One knob. And in the bottom right corner: old knobs given a second life with my new caps!


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A Pro-One, Prophet-600 and Prophet-5 all recapped:


Sequential Circuits Prophet-5 – panel replacement

I have a Prophet-5 that is in pretty nice condition except for a nasty dent in the black front panel.


I have been thinking about if it’s possible to fix it, and asking around on how to approach it. I got a lot of good tips in my fav Facebook group Vintage Synth Repair and Mods

The consensus there seemed to be that it is sometimes tricky to fix these kind of issues. It is possible that ‘fixing’ the problem may result in things looking worse.

The paint has been stretched, and will likely crackle if pounded flat. Using a heat gun to warm the panel (and the paint) could possibly help to avoid that.

There are also quite a few companies that repaint old synth panels, but none of them seem to be capable of doing the typical ‘grainy’ texture that many vintage synths have.

The best way to fix it would of course be to replace the panel with a new one. I asked around but was not able to locate one.

But then one day I was talking to a friend who works for a Swedish super-producer with many many many synths in his collection. He mentioned that they had a “organ donor” Prophet-5 in their warehouse, and that he would take a look at it next time he was there.

And yesterday he called with good news – the panel on it looked fine and I was welcome to have it!


And there we are. (Jan 22, 2016).

UPCOMING: Panel switcharoo!