DBX 640M

ZonePRO: an "installation" approach designed for multi-source distribution

The ZonePRO series was designed to meet the demands of fixed installations: reliability, repeatability of settings, and management of multiple sources to multiple zones. This 6 x 4 model with display fits this logic by combining, in a 1U chassis, digital conversion and full DSP processing to ensure coherent and protected sound distribution day after day.

Who is this ZonePRO 6 x 4 for, and when to use it?

This processor is particularly suited for environments such as restaurants, bars, conference centers, performance halls, and nightclubs, where multiple sources (background music, player, computer, microphone(s), control room) must be managed and different zones or distribution lines fed. The balanced mic/line inputs on Euroblock facilitate clean integration in technical racks, while the RCA inputs allow easy connection of consumer stereo sources.

DSP processing, protections, and control: essentials for controlled sound distribution

Processing for quality and intelligibility

Once analog signals are converted to digital, the internal DSP takes over to apply necessary processing for the installation: mixing, parametric equalizer, crossover, high-pass and low-pass filters, as well as notch filter. The goal is to shape the signal according to the speakers, the room, and the usage (voice, background music, more energetic playback).

Control and protection tools

To stabilize the sound distribution and protect the system, the ZonePRO integrates a range of field-oriented processing: compressor, limiter, noise gate, automatic gain control, and feedback eliminator. These functions help maintain a consistent level, contain peaks, and limit microphone feedback risks, while keeping a comfortable listening experience for the audience.

Programming, autonomy, and front panel control

Settings are made from a PC computer, then the device operates autonomously. On the version with display, daily operation is simplified thanks to dedicated front panel buttons allowing recall, activation, and adjustment of programs (source, level, program assignment). Programs can also be recalled via optional flush-mount wall remote controls depending on the installation.

Technical specifications

Number of channels

6

U-height

1

2 stereo audio sources	unbalanced inputs on RCA connectors	Dynamic range	greater than 109 dBA, greater than 106 dB unweighted
4 balanced mic or line sources	inputs on Euroblock connectors	THD + noise	0.003% at +4 dBu, 1 kHz
4 balanced outputs	on Euroblock connectors	Channel crosstalk	greater than 80 dB
Conversion	24-Bit / 48 kHz	Latency	0.6 ms
Frequency response	20 Hz to 20 kHz, +/- 0.5 dB