dbx 560A - Compressor/Limiter

dbx 560A - 500 Series Compressor/Limiter with OverEasy, VCA RMS and “Infinity+”

The dbx 560A is a 500 Series compressor/limiter that brings classic dbx sound to a modular form factor, featuring true RMS detection and a highly musical VCA . It offers the brand’s two signature behaviors— OverEasy (Soft Knee) and Hard Knee —plus program-dependent attack and release for natural dynamic control. Operation is straightforward (Threshold, Ratio, and Output), and precise metering on Input/Output and Gain Reduction LEDs makes it easy to fine-tune everything from subtle compression to brick-wall limiting in seconds. Hardwire bypass allows for on-the-fly comparisons between the wet and dry signals.

With a threshold of -40 to +20 dBu , variable ratios from 1:1 to ∞:1 , and the exclusive Infinity+ mode (negative ratios down to -1:1 for creative effects), the 560A adds punch to drums and bass guitars, stabilizes vocals and acoustic instruments, and protects peaks in live and studio applications. All this in a single-slot module compatible with any 500 Series chassis.

Main features

• VCA compression with RMS detection for musical and predictable response.
• OverEasy/Hard Knee with front switching and LED indicating the OverEasy zone.
• Wide ranges : threshold −40 to +20 dBu ; ratio 1:1 → ∞:1 and Infinity+ to −1:1 for negative ratios; gain adjustment −20 to +20 dB .
• Program-dependent attack/release time (Fast and Auto): typically 15 ms (10 dB), 5 ms (20 dB), 3 ms (30 dB) attack; typical release 8 ms (1 dB), 80 ms (10 dB), 400 ms (50 dB).
• Dedicated measurement : Input/Output switching on the level meter and Gain Reduction bar up to 40 dB (internal capacity up to 60 dB).
• Hardwire bypass for direct path when processing is disabled.
• Electronically balanced I/O with +22 dBu maximum input and output level.
• 500 Series format : 1 slot; power supply ±16 V ; consumption 60 mA/rail (1.92 W).

Product benefits

• Classic dbx sound – from transparent compression to aggressive control with the character of the 160 in a compact module.
• Easy to adjust : Three well-thought-out controls and clear measurement for consistent results in seconds.
• Extreme versatility : Covers vocals, bass, guitars, synths, and percussion; Infinity+ mode opens up creative possibilities.
• Professional integration : pro levels (+22 dBu), electronic balancing and wired bypass for reliable studio or live routing.

Use cases

• Kick, snare and bass : Hard Knee with high ratios for punch and transient control.
• Voices : OverEasy with moderate ratios for stable level without artifacts.
• Buses and acoustic instruments : program-dependent automatic attacks to follow natural dynamics.
• Creative Effect : Infinity+ (negative ratio) for collapsing peaks above the threshold and experimental textures.

Frequently Asked Questions

• Does it have attack and release controls? Not manual; they're program-dependent (auto), optimized for musicality.
• Can I use it as a hard limiter? Yes, with Hard Knee and a ∞:1 ratio (or Infinity+ for more radical effects).
• Is it compatible with any 500 chassis? Yes, it takes up one slot and requires a standard ±16 V power supply.

Description for projects

dbx 560A Compressor/Limiter (500 Series, 1 slot) ; VCA with RMS detection; OverEasy and Hard Knee modes; threshold −40 to +20 dBu ; ratio 1:1 → ∞:1 → −1:1 ( Infinity+ ); output gain −20 to +20 dB ; program-dependent attack/release (typical attack 15/5/3 ms; typical release 8/80/400 ms); switchable Input/Output metering and Gain Reduction up to 40 dB; hardwire bypass ; electronically balanced inputs/outputs, +22 dBu max; response 20 Hz–20 kHz +0/−0.5 dB , THD+N < 0.005% (uncompressed), noise < −97 dBu , DR > 119 dB ; Power supply ±16 V , 60 mA/rail (1.92 W); dimensions 13.34 × 3.81 × 15.24 cm ; weight 0.59 kg .