Maselec MLA-4 Triband Compressor/Expander
Developed in exclusive collaboration with Leif Mases, the Maselec MLA-4 Triband Compressor/Expander plug-in is the only officially endorsed software recreation of the iconic hardware.
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Developed in exclusive collaboration with Leif Mases, the Maselec MLA-4 Triband Compressor/Expander plug-in is the only officially endorsed software recreation of the iconic hardware.
Product details
Delivery, formats, and options
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Precision Dynamics, Without Compromise
Compression and Expansion Together
Most multiband processors give you compression or expansion — the MLA-4 gives you both, simultaneously, in every band. Tighten dynamics from above while lifting detail from below, shaping the full dynamic range of each frequency band with surgical control.
Sculpt Dynamics with Surgical Precision
Three fully configurable frequency bands — each with independent threshold, ratio, attack, and release — let you treat low, mid, and high frequency dynamics completely independently. Tame a boomy low end without touching vocal presence, or control harsh high frequencies without affecting the body of the mix.
Adaptive Waterfall Linking for Smoother Dynamics
The MLA-4's waterfall linking cascades gain reduction across bands, so when one band compresses it gently influences adjacent bands — preventing the unnatural pumping and frequency imbalance that plagues conventional multiband compressors. The result is transparent, musical dynamics processing even at heavy settings.
Preserve Your Sound, Perfect Your Dynamics
The MLA-4 is designed for mastering-grade transparency. Linear-phase crossover filters ensure zero phase distortion between bands, and the precision gain staging preserves every detail of your source material while you shape its dynamics.
Add Harmonics Only Where You Want Them
Go beyond the original hardware with per-band saturation controls. Add subtle harmonic warmth to the low end for weight, gentle midrange saturation for presence, or high-frequency harmonics for air — all without affecting the bands you want to keep clean.
Hear the Problem, Fix the Problem
A real-time spectral dynamics display shows you exactly how each band is compressing and expanding, so you can see the interaction between bands and fine-tune your settings with confidence. No guesswork — just precision.
Frequently Asked Questions
The MLA-4 is modeled on the Maselec MLA-4 triband compressor/expander — a mastering-grade dynamics processor designed by Leif Mases, known for precision dynamics control with zero coloration. The plug-in faithfully captures the circuit behavior and extends it with additional features.
Waterfall linking cascades gain reduction across adjacent frequency bands so they influence each other naturally. When the low band compresses, it gently nudges the mid band — preventing the unnatural pumping and frequency imbalance common in conventional multiband compressors.
Absolutely. While designed with mastering-grade precision, the MLA-4 is equally powerful on mix buses, drum groups, vocal chains, and individual tracks where you need independent control over dynamics in different frequency ranges.
The expander in each band works below the threshold — quietly lifting low-level detail and restoring dynamics that compression reduces. Used together, compression and expansion let you shape the entire dynamic range of each frequency band, not just the peaks.
The MLA-4 supports VST, VST3, AU, and AAX on macOS (including Apple Silicon native), and VST, VST3, and AAX on Windows. It works with all major DAWs including Pro Tools, Logic Pro, Ableton Live, Cubase, Studio One, and Reaper.
Yes. The MLA-4 runs natively on Apple Silicon (M1, M2, M3, M4) with no Rosetta translation required, giving you maximum performance and the lowest possible latency on modern Macs.
The MLA-4 uses PACE iLok for authorization. You can activate on an iLok USB dongle or directly on your computer using machine-based authorization — no physical dongle required. A free iLok account and current PACE drivers are needed.
We offer a 30-day money-back guarantee. If the MLA-4 does not meet your expectations for any reason, contact support within 30 days of purchase for a full refund — no questions asked.
Maselec MLA-4 Triband Compressor/Expander