DBXDriveRack 4820

Loudspeaker Management System

Designed to provide incredible flexibility, sonic excellence and intuitive control for performance applications, the DriveRack 4820 is the next member of the hugely successful of the hugely successful DriveRack family. From the powerful 96 kHz DSP engine and standard analog and digital I/O, to the tamper-proof front panel, the 4820 provides all the processing, flexibility and control necessary for permanent installations.

The DriveRack 4820 is the next generation of the famous DriveRack family, and like its predecessor it is engineered to provide "Everything you need between the mixer and the power amps." In keeping with this philosophy the 4820 includes four inputs and eight outputs with both analog and digital connectivity. The 96 kHz processing engine is capable of offering insert processing functions to customize the processing path for your application, in addition to the standard system processing functions all with extremely low latency and extended frequency response. From Signal Routing, EQ, and Bandpass Filters, to classic dbx® Dynamics and Feedback Suppression all the processing is available and with the sonic excellence that you would expect from the world's leading system processing manufacturer. With all this processing power available, control is of paramount importance. The DriveRack 4820 provides a tamper-proof front panel, and is controlled by an easy-to-use GUI with optional wall panel controllers; so whether you application is Front of House system processing or Distributed system control, the DriveRack 4820 has what it takes.


·       48 and 96 kHz operation

·       4 analog and AES/EBU inputs

·       8 analog and AES/EBU outputs

·       Full Bandpass Filters, Crossover and Routing Configurations with Bessel, Butterworth, and Linkwitz-Riley filters

·       31-Band Graphic and 9-band Parametric EQ on every input

·       6-band Parametric EQ on every output

·       Loudspeaker Cluster and Driver Alignment Delays

·       Selectable DSP inserts on all inputs and outputs including Classic dbx Compression, Limiting and Advanced Feedback Suppression among others

·       Ethernet HiQnet™ networking control

·       Optional dbx ZC wall panel control

·       Optional Jensen® I/O Transformers



(4) total

Input Connectors

Female XLR

Input Type

Electronically balanced, RF filtered

Insert Impedance

>50k ohm

Max Input

Software selectable for: +28, +26, +24, +22, +20, +18, +16, +14 dBu


>40 dB typical, >55 dB at 1 kHz

Digital Inputs

(4) AES/EBU Channels

Digital Input Connectors

Female XLR

Digital Input Type

Transformer Isolated, RF filtered

Digital Input Impedance

>110 ohms

Mic Preamp Connector

(RTA) - (1) Female XLR

Mic Preamp gain

(RTA) 10dB to 50dB in 10dB increments


8 total

Output Connectors

Male XLR

Output Type

Electronically balanced, RF filtered

Output Impedance

30 ohms

Max Output

Software selectable for: +24, +22, +20, +12, +8, +4 dBu

Digital Output

(8) AES/EBU Channels

Digital Output Connector

Male XLR

Digital Output Type

Transformer Isolated, RF filtered

Digital Output Impedance

>110 ohms

A/D Converter

dbx Typve IV™ Converstion System

A/D Dynamic Range

>114 dB unweighted, 116dB A-weighted

Type IV Dynamic Range

128dB with transient material, A-weighted, 22kHz BW 126 dB with transient material, unweighted, 22 kHz BW 120 dB typical

with program material, A-weighted, 22 kHz BW

Sample Rate



24 bits

D/A Dynamic Range

112 dB unweighted, 115 dB A-weighted

Dynamic Range

112dB unweighted, 115dB A-weighted

Internal Processing

32 bit floating point


0.004% typical at +4 dBu, 1 kHz, 0 dB input gain

Frequency Response

20 Hz- 40 kHz, +/-0.5 Db

Interchannel Crosstalk

<-85 dB at 1 kHz, 0 dB input gain

Pre EQ Type

One 31-band Graphic EQ on each input One EQ that is switchable between 31-band and 9-band Parametric on each input

EQ Gain

+/- 12Db

Input Insert Processing

Two selectable Insert Processing blocks per input: Noise Gate, Compressor, Auto Gain Control, De-Esser,

Sub-Harmonic Synth, Advanced Feedback Suppression

Input Delay Length

Up to 682 mSec available


4-input mixer available at each output allowing any input to be sent or mixed to any output

Output Insert Processing

Two selectable Insert Processing blocks per output: Noise Gate, AutoWarmth®, Compressor, Auto Gain

Control, Peak Limiter, Sub-Harmonic Synth, Advanced Feedback Suppression


configs: 1x1, 1x2, 1x3, 1x4, 1x5, 1x6, 1x7, 1x8, 2x2, 2x3, 2x4 2x5, 2x6, 2x7, 2x8, 3x3, 3x4, 3x6, 3x7, 4x4, 4x5, 4x8

Crossover Filter Type

Bessel 6, 12, 18, and 24 dB per Octave Butterworth 6, 12, 18, and 24 dB per Octave Linkwitz-Riley 12, 24, 36, and 48 dB per



Positive and Negative

Phase Control

0 to -180 degrees in 5 degree increments

Output Delay Length

1365 mSec shared between the outputs


I/O: optional


Ethernet, RS-232, Optional dbx ZC Wall Panels

Power Consumption

100V to 240V 50/60Hz, 45 Watts



Unit Weight

11 lbs.

Shipping Weight

12.5 lbs.