dbx 640 6x4 Digital Zone Processor

dbx 640 6x4 Digital Zone Processor

In stock

SKU
DBX640V
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Description

With 6 inputs and 4 outputs the dbx ZonePRO® 640 ω rovides flexible signal routing, powerful DSP processing and multiple control interfaces for Commercial Audio applications.

Designed to offer superior system sonic performance and flexibility, the 640/641 deliver the highest quality tools available. Even the input and outputs connectors were chosen for their standard usage and reliability. The ZonePRO products offer Euroblock connectors for balanced signals and RCA connectors for interfacing with consumer equipment often used in commercial applications; there is also a simple analog input buss that allows inputs to be sent from one unit to the next for unit and job scalability. The 640 ω nd 641 provide every necessary processing tool, from the input processing like gain control and EQ available on all inputs to highly sophisticated and specific functions such as selectable paging microphone processing including Gating, De-Essing, Auto Gain Control, Compression and Feedback Suppression. The heart of the ZonePRO products is the Routing module that provides of course Primary Source Selection but also Source Ducking for Paging and Priority Override. The outputs also offer a wealth of processing designed for commercial applications like our patent-pending AutoWarmth® function that was co-developed with JBL to provide natural low frequency extension at any signal level. Each output also offers EQ, Bandpass and Crossover filters, Limiting and Delay for system optimization. With the ZonePRO® every tool is at your disposal to maximize the response of your system.

Beyond processing, the ZonePRO® products offer multiple forms of control to further extend the versatility of your system. From easy-to-use wall panel Zone Controllers for standard end-user functions like source select and volume control to advanced system control including a built-in Real Time Clock that can provide programmable system changes throughout the day or week. For system setup and monitoring the ZonePRO Designer software provides an intuitive interface and a speedy setup Wizard for configuring and editing all system parameters.

The ZonePRO® 640 ω ill take your Commercial Audio system to the next level with advanced processing, versatility and control.

Features

  • Advanced Feedback Suppression (AFS™)
  • Autowarmth®
  • Auto Gain Control
  • Compression
  • Limiting
  • Noise Gating
  • Notch Filtering
  • Bandpass and Crossover Filters
  • Parametric EQ
  • Security Lockout
  • Wall Panel Control
  • RS-232 Control
  • Windows® 2000 and XP GUI
  • IEC, UL and CSA Approvals

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 @ 1khz ω
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.(3.1k ω )
Shipping Weight 8.8 lbs. (4.0k ω )
Dimensions 1.75" H x 5.75" D x 19" W
Safety Agency Certifications UL 600065, IEC 60065, EN 55013, E60065
More Information
Condition New
Country of Manufacture China
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At a Glance

The dbx 640 is a 6-input, 4-output digital zone processor built for commercial audio installations, live paging systems, and multi-zone sound reinforcement where transparent, reliable signal routing and processing are non-negotiable. Sound engineers and live-sound technicians choose it for its advanced feedback suppression, natural low-end extension via AutoWarmth, and precise zone control—all delivered with minimal distortion and maximum system flexibility. Its balanced Euroblock connectors, RCA inputs, and multiple control interfaces make it road-ready and venue-proof for any installation or reinforcement scenario.

Who This Is For

Great for

  • Commercial Audio Installation
  • Live Sound Reinforcement
  • Paging Systems
  • Multi-Zone Audio Distribution
  • Conferencing Systems

Not the best pick for

  • Home Stereo Listening
  • DJ Performance
  • Music Production

Skill level: Intermediate · Advanced · Professional

Frequently Asked Questions

What inputs and outputs does the 640 have?

The 640 provides 6 inputs total: 2 switchable line/mic inputs with Euroblock connectors and phantom power, plus 4 RCA source inputs. It has 4 balanced outputs via Euroblock connectors. All connectors are chosen for reliability in commercial installations.

What processing tools are included?

On-board tools include Advanced Feedback Suppression (AFS), AutoWarmth for natural low-end extension, Auto Gain Control, compression, limiting, noise gating, parametric EQ, notch filtering, bandpass and crossover filters, and output delay for system optimization.

How is the 640 controlled and set up?

The 640 can be controlled via optional wall panel Zone Controllers for end-user functions like source select and volume, RS-232 for advanced system integration, or ZonePRO Designer software (Windows 2000/XP GUI) for intuitive setup and real-time monitoring. It includes a built-in Real Time Clock for programmable daily or weekly system changes.

What are the key audio specifications?

Input dynamic range exceeds 113 dB (A-weighted), output dynamic range is 109 dB, THD+Noise is 0.003% at +4 dBu, frequency response is 20 Hz–20 kHz (+/-0.5 dB), and interchannel crosstalk is >80 dB typical. The unit operates at 48 kHz sample rate with 24-bit oversampling.

Is the 640 suitable for multi-zone commercial audio or paging?

Yes. The 640 is purpose-built for commercial audio installations and paging systems, with features like source ducking for paging priority, selectable paging microphone processing (gating, de-essing, compression), and flexible routing for multi-zone distribution.

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