The dbx ZonePRO 640 is a professional 6-input, 4-output digital zone processor designed for commercial audio installations. It delivers flexible signal routing, powerful DSP processing, and multiple control interfaces to optimize sound across restaurants, retail spaces, conference rooms, houses of worship, and other multi-zone environments.

Built for reliable performance, the ZonePRO 640 features balanced Euroblock inputs for microphones and line sources, plus unbalanced RCA inputs for consumer equipment. A simple analog input bus allows scalable expansion, sending signals from one unit to the next. Each input supports gain control, EQ, and sophisticated paging processing including gating, compression, de-essing, auto gain control, and feedback suppression.

At the core of the ZonePRO 640 is a versatile routing module offering primary source selection, source ducking for paging, and priority override. Outputs include AutoWarmth® low-frequency enhancement, EQ, bandpass and crossover filters, limiting, and delay, giving you full control to optimize each zone’s sonic performance.

The ZonePRO 640 also supports multiple control options, from user-friendly wall-panel Zone Controllers for volume and source selection to advanced system management via built-in Real Time Clock scheduling and third-party control via Ethernet or RS-232. Setup and monitoring are streamlined with the ZonePRO Designer software, featuring an intuitive interface and step-by-step configuration wizard.

With the dbx ZonePRO 640, commercial audio systems gain maximum flexibility, high-quality processing, and professional-grade control, ensuring every zone sounds its best at any volume level.

dbx ZonePro 640 Key Features

  • 6 Inputs / 4 Outputs – Flexible configuration for multi-zone audio installations.

  • Balanced Euroblock Mic/Line Inputs & RCA Inputs – Reliable connections for commercial and consumer devices.

  • Input Processing – Gain control, EQ, paging processing (Gating, De-Essing, AGC, Compression, Feedback Suppression).

  • Routing Module – Primary source selection, source ducking, priority override.

  • Output Processing – AutoWarmth®, EQ, bandpass & crossover filters, limiting, delay.

  • Analog Input Bus – Expand system scalability across multiple units.

  • Multiple Control Options – Wall-panel Zone Controllers, RS-232/Ethernet control, Real-Time Clock scheduling.

  • ZonePRO Designer Software – Intuitive interface with wizard-driven setup, configuration, and monitoring.

  • Professional-Grade Reliability – Designed for commercial audio applications requiring consistent, high-quality performance.

dbx ZonePro 640 Specifications

Input (6 total) (2) Switchable line or mic inputs (4) RCA Source
Input Connectors Euroblock (Line and Mic) RCA (Source)
Input Type Electronically balanced/RF-filtered
Input Impedance 50k ohm balanced, >75k ohm unbalanced
Max Input +20dBu Mic/Line, +12dBu RCA
CMRR >40dB, typically >55dB @ 1 kHz
Mic Preamp gain 30 to 60dB
Mic Preamp Equivalent Input Noise (EIN) <-118dB
Mic Preamp Phantom Power 15V
Output 4 total
Output Connectors Euroblock
Output Type Electronically Balanced, RF Filtered
Output Impedance 120 ohms balanced, 60ohm unbalanced
Max Output +20dBu
A/D Converter dbx Type IV™ conversion system
A/D Dynamic Range (line) >113 dB, A-weighted, >110 dB unweighted
Type IV Dynamic Range >119dB, A-weighted, 22kHz; BW: >117dB, unweighted, 22kHz BW
Digital Output RCA 24-Bit oversampling
Digital Output Dynamic Range >114 dB A-weighted, 110dB unweighted
Sample Rate 48kHz
D/A Dynamic Range 112 dB A-weighted, 109dB unweighted
Dynamic Range >109 dB A-weighted, >106 dB unweighted
THD+Noise 0.003% typical at +4dBu, 1kHz, 0dB gain
Frequency Response 20Hz - 20kHz, +/-0.5dB
Interchannel Crosstalk >80dB typical
Propagation Delay 0.6 msec
Operating Voltage 100VAC 50/60Hz, 120VAC 60Hz and 230VAC 50/60Hz
Power Consumption 29 W
Unit Weight 6.8 lbs.(3.1 kg)
Shipping Weight 8.8 lbs. (4.0 kg)
Dimensions 1.75” H x 5.75” D x 19” W
Safety Agency Certifications UL 600065, IEC 60065, EN 55013, E60065
List price: $970.00
Price: $970.00