Alesis Microlimiter Modification & Recap (with Sidechain Filter)

Description

This modification for the Alesis Microlimiter has four parts:

1. Replace all electrolytic caps in the audio path with larger bipolar caps
2. Replace the reservoir caps in the power supply with bigger caps & fit more decoupling
3. Reduce the compressor release time
4. Fit a switchable sidechain filter

Parts 1 & 2 replace old capacitors to reduce noise & help extend the low-end frequency response of the unit

Part 3 makes the unit much less subtle by shortening the minimum release time. It is now capable of sounding pretty abrupt. At longer release time settings it sounds smoother & more like the original unit. The extremely long (and basically useless) release times are removed

Part 3 creates a high-pass filter for the sidechain, making the compressor less sensitive to low frequencies and reducing pumping. The filter is switchable with three settings:

• bypass (standard)
• subtle high-pass filter
• unsubtle high-pass filter

I unsubtle mode you’ll find the compressor will choke with high input levels. This is a side-effect of the mod – if it happens either reduce levels or switch out the filter

the bypass switch can be fitted on the back panel or on the front panel. See photos for an example of a back-panel switch

Notes

• No shipping charges for mods carried out on in-stock items
• I can mix & match parts of this mod on request