Eurorack pots and jacks spacing

From circuitbending to homebrew stompboxes & synths, keep the DIY spirit alive!
Post Reply
User avatar
Learning to Wiggle
Posts: 30
Joined: Fri May 18, 2018 11:40 am
Location: Italy

Eurorack pots and jacks spacing

Post by MickMad »

Hello there,

I have searched the forum for a definitive post about this subject but I couldn't find "one topic to rule them all" about it.

What are your go-to spacings for pots and jacks when you design your Eurorack panels? What are your minimum spacing values that you use? Would you rather go for a larger spacing between controls and sacrifice rack space by making bigger modules or keep it as small as possible while being practical?

I'm making this question because I am designing my own modules which I will present later when I make the first protos, and I am questioning whether my modules will or will not be usable.

The tightest I'm doing s 19mm spacing between pots, 19mm spacing between pots and jacks, and 13mm horizontal spacing vs 11mm vertical spacing between jacks, or between jacks and toggle switches (the pots spacing is to be considered with 9mm pots and with 12mm knobs).

I actually have a prototype where I put Volca-style pots on a 13mm spacing and they are kinda usable (they are meant to be used every once in a while, not like a frequency pot on a filter), but then again that's insulated pots with no knob. My question is more concerning normal pots with knobs.

Thanks in advance to everyone who contributes with their opinion on this subject.
User avatar
Eric the Red
Ultra Wiggler
Posts: 891
Joined: Tue Jun 02, 2015 12:43 pm
Location: Detroit, MI

Post by Eric the Red »


Check out how Rex developed his panels here: viewtopic.php?t=78836&postdays=0&postor ... &start=200
Abandon all hope, ye who wiggle.
User avatar
Ultra Wiggler
Posts: 994
Joined: Sun Dec 04, 2011 9:14 pm

Post by soup »

I think the general rule is being able to get a finger between the knobs but it's easy to get a piece of heavy cardboard from your local art supply store, cut it size, mount pots on it and test your design.
User avatar
Veteran Wiggler
Posts: 526
Joined: Wed Oct 12, 2011 12:59 pm

Post by executiveBlaster »

you’ll really need to build it and feel it out! at least get a panel laser cut or something like that and install the pots and jacks to feel it.

I put jacks on a .6” grid (~15mm), pots on 1.2” grid (~30mm). very happy with this spacing. pots with a knob will almost always be 1.2” away from jacks, but there are some cases this is ok.

my brother and I argue back and forth on whether we should have lots in a small space for customers’ sake, or big spread out modules, for the customers’ sake :)
User avatar
Synthwerks Design
Posts: 8037
Joined: Fri Mar 06, 2009 1:18 pm
Location: Seattle WA

Post by ersatzplanet »

There is no set rule to this. Just look at the modules in your rig and see the differences. Your knob choice will determine the spacing there. Basically look at as many modules you can and see which ones feel the best to you and use their spacing. If it is a great module, the spacing of the knobs/jacks will be at the bottom of the list for most people. This is why I sell controllers! If your knobs have CV inputs, they can be a little more cramped.

James Husted - past major partner in Synthwerks, LLC
"It takes about a week to learn how to play a synthesizer, but several years to learn how *not* to play it." - Brian Eno
User avatar
Jay F.
Common Wiggler
Posts: 175
Joined: Mon Jul 17, 2017 12:20 pm
Location: Belgium

Post by Jay F. »

In my last build I put pots on a 25 mm grid and jacks on (roughly) half that space : 4 jacks could fit the space of a pot.
Switches taking twice the space of a jack.

And I use clones of Davies 1900H knobs.
"We are born naked, wet and hungry. Then things get worse."
User avatar
Super Deluxe Wiggler
Posts: 2267
Joined: Thu May 29, 2014 7:52 pm
Location: Sydney, Australia

Post by jsleeio »

When spacing jacks, make sure you allow enough room for the tool used to fasten the jack to the panel

With Thonkiconns and probably other jacks it's possible to pack them dense enough that the appropriate hex socket won't fit. Not such a big deal if you're using the smaller knurled nuts and the matching tool

You can allow for this and knob sizes in CAD by drawing extra shapes in a documentation layer

Personally I don't like things being too uniform, as it makes the modules all blend together too much. Olivier Gillet talked about this in his Why We Bleep podcast with mylar.melodies too, recommend having a listen :guinness:
User avatar
Learning to Wiggle
Posts: 30
Joined: Fri May 18, 2018 11:40 am
Location: Italy

Post by MickMad »

indigoid wrote:Olivier Gillet talked about this in his Why We Bleep podcast with mylar.melodies too, recommend having a listen :guinness:
that was a really cool podcast :) I listened to it yesterday! Thanks for the suggestion
Post Reply

Return to “Music Tech DIY”