# DIY Spring Reverb Module **URL:** \ **Category:** DIY STUFF\ **Created:** [March 25, 2022, 2:16pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815 "2022-03-25T14:16:41Z")\ **Posts on this page:** 20\ **Page:** 1
**Author:** ![Kellerdev](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@Kellerdev](https://lookmumnocomputer.discourse.group/u/Kellerdev)\ **Post date:** [March 25, 2022, 2:16pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/1 "2022-03-25T14:16:41Z")
Hello Guys, I’ve built a Spring Reverb Module for Eurorack. I followed some schematics I found online, mostly for the driver of the coil, but also added Low and High pass filter (simple RC buffered filters), feedback and distortion. I really liked how the distortion worked, as it is a soft clipping type, and it acts a bit like compressor, it icreases the loudness. Then I found that there is kind of a bad flaw, that I am not buffering the input, which creates an unwanted second feedback path. So I created a version without this distortion. Here is a vide: [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/4/8/487616a0f8f50de8a4c1698469a7891566107a45.jpeg "DIY Spring Reverb with feedback for Eurorack") ](https://www.youtube.com/watch?v=sded6s9DvT8) ---
**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\ **Post date:** [March 25, 2022, 4:02pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/2 "2022-03-25T16:02:28Z")
Nice work ! welcome to the forum 🙂 ---
**Author:** ![Bpbby](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bpbby/32/15259_2.png) [@Bpbby](https://lookmumnocomputer.discourse.group/u/Bpbby)\ **Post date:** [March 25, 2022, 6:01pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/3 "2022-03-25T18:01:05Z")
Great work indeed !! I was wondering if the spring has to be a special one (especially for music and sound I mean) or if any spring would work ? I am thinking that the sound quality would maybe not be as good but i cant see why it wouldn’t work 🤔 ---
**Author:** ![Kellerdev](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@Kellerdev](https://lookmumnocomputer.discourse.group/u/Kellerdev)\ **Post date:** [March 25, 2022, 7:00pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/4 "2022-03-25T19:00:30Z")
Well the reverb tank is a unit that comes with springs, I haven’t mounted them myself. But I’ve seen a video by one guy who build a spring reverb from scrap parts. I don’t think there’s something very special about the spring. The greater trouble are the pickups, they are like guitar pickups but bigger, I don’t know exactly how they function. But prebuild reverbtanks are commmon, you can find one on ebay for 10-20 dollars second hand. Now you have to adjust the resistor values for the driver for the different coils you use though ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [March 25, 2022, 7:42pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/5 "2022-03-25T19:42:19Z")
Even new reverb tanks are available for under $30, if you aren’t inclined to buy used > **[Reverb Tanks | Amplified Parts](https://www.amplifiedparts.com/products/reverb_tanks)** > > Browse products from the Reverb Tanks category - listing products sorted by popular, page 1 If you’re building Kosmo, Sam says he’s got a spring reverb module in the works ---
**Author:** ![Bpbby](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/bpbby/32/15259_2.png) [@Bpbby](https://lookmumnocomputer.discourse.group/u/Bpbby)\ **Post date:** [March 25, 2022, 9:00pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/6 "2022-03-25T21:00:17Z")
Thanks both for the reply. I am not sure if i will ever build one but for me there is something quite fascinating around this reverb effect, probably coming to the very mechanical aspect of it. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [March 25, 2022, 9:14pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/7 "2022-03-25T21:14:14Z")
The reverb tanks also turn up in old amps, organs and eBay. ---
**Author:** ![Kellerdev](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@Kellerdev](https://lookmumnocomputer.discourse.group/u/Kellerdev)\ **Post date:** [March 25, 2022, 9:23pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/8 "2022-03-25T21:23:10Z")
Check out this guy [![](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/9/e/9ee037669202d58a0e4e9882f71dbeeb00f00b59.jpeg "Cheeseverb Electric Guitar Spring Reverb by SoaringTortoise made from Recycled Materials") ](https://www.youtube.com/watch?v=JOLZZVy06wk) oldschool genious ---
**Author:** ![Soundbrigade](https://avatars.discourse-cdn.com/v4/letter/s/4af34b/32.png) [@Soundbrigade](https://lookmumnocomputer.discourse.group/u/Soundbrigade)\ **Post date:** [March 26, 2022, 1:56pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/9 "2022-03-26T13:56:43Z")
I am going for the newer solid state types, but a real spring reverb tank had been really cool. They aren’t that expensive either. Some of the old DIY synths described in various magazines had this kind of echo units. However can you use a SPRING reverb after May 31st??? 🙄 ---
**Author:** ![Kellerdev](https://avatars.discourse-cdn.com/v4/letter/k/f9ae1b/32.png) [@Kellerdev](https://lookmumnocomputer.discourse.group/u/Kellerdev)\ **Post date:** [March 26, 2022, 1:59pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/10 "2022-03-26T13:59:32Z")
You can try but it probably not going to work. Same like the plate reverb only works when you have lunch. That’s why people switched to chips… edit: It MAY or MAY not work ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [October 27, 2023, 4:59pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/11 "2023-10-27T16:59:05Z")
Here’s a schematic of the Doepfer spring reverb module, if anyone’s collecting ideas: > **[Doepfer A-199 Spring Reverb Schematic](https://sandelinos.me/diy/doepfer-a199-schematic/)** > > Doepfer A-199 SPRV Spring Reverb module schematic traced by me. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [October 27, 2023, 6:29pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/12 "2023-10-27T18:29:57Z")
Spooky! I moved house this year and today i found my box of salvaged reverb tanks, (in the kitchen under the sink. obviously) and then you post this. Many thanks! ---
**Author:** ![K.ostas](https://avatars.discourse-cdn.com/v4/letter/k/ed655f/32.png) [@K.ostas](https://lookmumnocomputer.discourse.group/u/K.ostas)\ **Post date:** [October 27, 2023, 9:40pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/13 "2023-10-27T21:40:28Z")
Unfortunately, in many countries, reverb tanks do not come up often in the ads for second-hand instruments, and when they do they are listed for as much as new (if not more). Buying of ebay is not an option either as the postage will easily double or triple the listed price. 🤷‍♂️ I do look for them nevertheless! ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [October 27, 2023, 11:02pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/14 "2023-10-27T23:02:10Z")
The mechanics of a spring tank are straightforward and a fun build. I had one made from a small display coffin I found at a car boot sale. ---
**Author:** ![Marty](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/marty/32/30770_2.png) [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Post date:** [July 29, 2025, 7:32pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/15 "2025-07-29T19:32:04Z")
Hi, just build it and tested it. Not completed though, need panel manufactured but it sounds awesome. A whole lot better than the Tombola Circuit. Way smoother blending transitions and the Emphasis acts like a EQ. Will soon upload a few pictures I’ve taken during building and a small demo. ![20250725_141216](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/e/1/e1384b4d2510069d849160800da12feb61dfdfe8.jpeg) ![20250725_142818](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/3/3/33ee534af5c167e2266568ba36c01b0ff9d07164.jpeg) ![20250725_195137](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/3/0/30dc4a38ea66f2f35b1885560ea986af5509cd90.jpeg) ![20250728_191957](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/3X/2/9/29c20ef7eecec87e39b86eef5db169a701f6965b.jpeg) https://w.soundcloud.com/player/?visual=false&url=https%3A%2F%2Fapi.soundcloud.com%2Ftracks%2F2138554332&show_artwork=true&maxheight=166 ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [July 29, 2025, 9:42pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/16 "2025-07-29T21:42:11Z")
What a neat driver! Can you point to a schematic? My spring reverb circuit is based on a sprawling circuit used by Vox and I’ve never liked it. I tried the MIAW version and hit a wall of issues that has it sitting in a box of ‘finish sometime’. Also in the same box is the unfinished driver for a plate reverb that is waiting for another free sheet of hardened steel. The test for the proof of concept used an old H&H amp combo’s fx loop to test it. ---
**Author:** ![Marty](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/marty/32/30770_2.png) [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Post date:** [July 29, 2025, 10:09pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/17 "2025-07-29T22:09:11Z")
Sure Very simple to build but i cant upload pdf files.Just ask @Sandelinos he has the schematic of the Doepfer Reverb so has @analogoutput Let me know how things are working out. ---
**Author:** ![Farabide](https://avatars.discourse-cdn.com/v4/letter/f/ecc23a/32.png) [@Farabide](https://lookmumnocomputer.discourse.group/u/Farabide)\ **Post date:** [July 29, 2025, 10:31pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/18 "2025-07-29T22:31:05Z")
Thanks again Marty. You’re a star! I don’t usually post finished commissions but as this drum set will be a freebie make for a pal I’ll be sure to post up the finished work. Fyi. As I’m disabled, my progress is slow to glacial at times but I’m sure to finish up in the next couple of months. ---
**Author:** ![Marty](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/marty/32/30770_2.png) [@Marty](https://lookmumnocomputer.discourse.group/u/Marty)\ **Post date:** [July 29, 2025, 10:32pm UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/19 "2025-07-29T22:32:37Z")
No worries mate. Take as much time as you need. Just curious how your version ends up. ---
**Author:** ![Sandelinos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/sandelinos/32/27423_2.png) [@Sandelinos](https://lookmumnocomputer.discourse.group/u/Sandelinos)\ **Post date:** [July 30, 2025, 5:39am UTC](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815/20 "2025-07-30T05:39:06Z")
Here’s my A-199 schematic that was mentioned: [Doepfer A-199 Spring Reverb Schematic | Sandelinos' website](https://sandelinos.me/diy/doepfer-a199-schematic/) [Next page](https://lookmumnocomputer.discourse.group/t/diy-spring-reverb-module/4815.md?page=2)