Music Thing Modular - Spring Reverb Expander

Product information "Music Thing Modular - Spring Reverb Expander"
The passive Spring Expander adds phono sockets on a separate front panel plus adds a blend knob for brick/tank.

• This is a very simple passive expander for the revised Spring module, which brings the phono connections to the front panel — ideal for smaller cases — and adds a simple mix control to blend real spring tanks with the solid state reverb 'brick'.
• The main reverb module has phono sockets on the back, so you can put a reverb tank inside your modular case. Often, you might want to mount the spring tank outside the case; for small cases, or for access to the springs — stroking them or muting them or ‘preparing’ them in some way. This little 3hp expander makes that simple.
• The panel is designed to be reversible, depending how you want to arrange the cable to your spring tank.
• The expander also has a simple mix pot to blend the spring and brick reverbs together — this is a really nice effect, particularly when using feedback.
• Weird patch trick: If you use the expander with a brick, but without a spring connected to the front or back of the module, the spring drive circuit will overdrive massively (the spring pickup is part of the feedback loop of an op amp, so without it you get open loop gain). Fading across to spring and playing with feedback and EQ can get some really crunchy, squeaky extreme distortion that can be quite controllable with the blend control.
• If you want to know more about spring reverb than you ever thought possible, enjoy my Medium post Everything I know about spring reverb.
• This is a very simple build - just a potentiometer and a couple of wires soldered onto the PCB, but if you have any trouble the best place to find help is in the Spring Reverb Github Issues List. Remember to search for closed issues as well as open ones.

THT-Kit-1. This is a Do-It-Yourself kit, not an assembled module. The kit includes all parts to build the module. Only trough-hole parts to solder. Make sure to check the build guide before you buy. For build guide, more info, videos etc. please check the buttons below.
Current draw +12 V [mA]: 75
Current draw -12 V [mA]: 25
DIY Level: Medium
Depth [mm]: 44
Width [HP]: 6
Format: 3U
Panel / Color: Silver Alu
Manufacturer "Music Thing Modular"
Eurorack Modular Synth format. They are designed in Herne Hill, London by Tom Whitwell. I’m a former journalist and magazine editor (Mixmag & The Face). In the noughties I ran the Music Thing blog, before working at The Times. Got into DIY electronics after attending a workshop with Tom Bugs, reading Handmade Electronic Music, playing with Arduino and building guitar pedals. Contacting me directly is rarely a quick way to get help with a project or a technical problem. GitHub issue lists are a good place to start (Turing Machine, Radio Music), a search of MW DIY will often find answers, as will looking at the Facebook Synth DIY group. You can read more about Music Thing Modular and open source in this article: Why Open Source Music Hardware works for Music Thing Modular.

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