Waves L4 Ultramaximizer 2025 Review: Great or Average?
October 2, 2025 ยท By VDAM ยท 8 min read
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The Waves L4 Ultramaximizer is built for loud, clean masters in 2025's streaming era. I've tested it, studied the manual, and put it through its paces. It's a beastly maximizer โ but not a full mastering chain.
What Is the L4?
The L4 is a peak limiter with a real-time adaptive engine that analyzes transients, crest factor, and envelope to adapt release, lookahead, and attack. Five limiting modes: Modern, Smooth, Aggressive, Safe, L2 Legacy. True Peak and Oversampling up to x16. EBU R128 loudness meter built in.
Real-World Testing
Trap (808-heavy) โ Aggressive mode, -10dB Threshold, Clip x2. Hit -6.5 LUFS with tight lows.
Indie Rock โ Smooth mode, Release x1.5. Kept transients crisp, LRA held at 8.
A must for loud, polished masters โ especially as the last plugin in a chain. At around $29, it's an almost no-brainer for anyone serious about loudness control in 2025.
