ALM Busy Circuits MT-EX2 (Early 2020s)
An expander module that adds a second effects send and return to each channel of the MEGA-TANG mixer
Overview
The ALM Busy Circuits MT-EX2 is an expander made only for the MEGA-TANG mixer, introduced in the early 2020s. It adds a second effects send and return to each of the mixer's four channels. That means more complex routing without external mixers or patching workarounds. It's a passive, daughterboard-style module that attaches straight to the MEGA-TANG and takes its power and mounting from the mixer, with no extra cables or rails. The MT-EX1 adds extra inputs. The EX2 handles layered effects processing.
Specifications
| Width | 4HP |
| Depth | 32mm |
| Power Consumption | 25mA @ +12V, 25mA @ -12V |
| Compatibility | Mega-Tang only |
| Max Expanders Supported | 1 per Mega-Tang |
| Send/Return Channels | 4 channels, 2 sends and 2 returns per channel |
| Jacks | 8x 3.5mm (4x send, 4x return) |
| Signal Path | Passive, unbuffered |
| Mounting Type | Direct attach to Mega-Tang |
| Weight | Approx. 50g |
| Model Variant | MT-EX2 (second expander model) |
Design
The MT-EX2 is a daughterboard-style expansion that attaches physically to the MEGA-TANG mixer and draws power directly from it. It is passive, with no active circuitry, and relies only on switching and passthrough to route signals. There is no buffering and no signal processing, so the tonal character of the source and the connected effects stays as it was. Because it doesn't drive the signal, it keeps noise floor and power draw low. It also can't correct impedance mismatches or drive long cable runs.
Context
The MT-EX2 showed up in the early 2020s, when Eurorack systems were shifting from pure sound generation toward advanced signal management. ALM expanded the MEGA-TANG platform with targeted accessories. The MT-EX1 added extra inputs for multitrack flexibility, and the MT-EX2 addressed the growing need for layered effects. Competitors like Intellijel and Make Noise were already putting effects sends in their mixers, but often limited to one global loop or shared aux buses.
Market
New units sell for $120, and used ones typically trade between $90 and $110. The most common issue is bent pins on the MEGA-TANG's expansion header, usually from improper installation. Bent pins can cause intermittent signal loss or DC offset. With no moving parts or sensitive components, failure rates are extremely low.
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