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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
Input(4) total
Input ConnectorsFemale XLR
Input TypeElectronically balanced, RF filtered
Insert Impedance>50k ohm
Max InputSoftware selectable for: +28, +26, +24, +22, +20, +18, +16, +14 dBu
CMRR>40 dB typical, >55 dB at 1 kHz
Digital Inputs(4) AES/EBU Channels
Digital Input ConnectorsFemale XLR
Digital Input TypeTransformer 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
Output8 total
Output ConnectorsMale XLR
Output TypeElectronically balanced, RF filtered
Output Impedance30 ohms
Max OutputSoftware selectable for: +24, +22, +20, +12, +8, +4 dBu
Digital Output(8) AES/EBU Channels
Digital Output ConnectorMale XLR
Digital Output TypeTransformer Isolated, RF filtered
Digital Output Impedance>110 ohms
A/D Converterdbx Typve IV™ Converstion System
A/D Dynamic Range>114 dB unweighted, 116dB A-weighted
Type IV Dynamic Range128dB 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 Rate96kHz
Wordlength24 bits
D/A Dynamic Range112 dB unweighted, 115 dB A-weighted
Dynamic Range112dB unweighted, 115dB A-weighted
Internal Processing32 bit floating point
THD+Noise0.004% typical at +4 dBu, 1 kHz, 0 dB input gain
Frequency Response20 Hz- 40 kHz, +/-0.5 dB
Interchannel Crosstalk<-85 dB at 1 kHz, 0 dB input gain
Pre EQ TypeOne 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 ProcessingTwo selectable Insert Processing blocks per input: Noise Gate, Compressor, Auto Gain Control, De-Esser, Sub-Harmonic Synth, Advanced Feedback Suppression
Input Delay LengthUp to 682 mSec available
Routing/Mixing4-input mixer available at each output allowing any input to be sent or mixed to any output
Output Insert ProcessingTwo selectable Insert Processing blocks per output: Noise Gate, AutoWarmth®, Compressor, Auto Gain Control, Peak Limiter, Sub-Harmonic Synth, Advanced Feedback Suppression
Crossoverconfigs: 1x1, 1x2, 1x3, 1x4, 1x5, 1x6, 1x7, 1x8, 2x2, 2x3, 2x4 2x5, 2x6, 2x7, 2x8, 3x3, 3x4, 3x6, 3x7, 4x4, 4x5, 4x8
Crossover Filter TypeBessel 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 Octave
PolarityPositive and Negative
Phase Control0 to -180 degrees in 5 degree increments
Output Delay Length1365 mSec shared between the outputs
TransformerI/O: optional
ControlsEthernet, RS-232, Optional dbx ZC Wall Panels
Power Consumption100V to 240V 50/60Hz, 45 Watts
Unit Weight11 lbs.
Shipping Weight12.5 lbs.