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Description

The dbx DriveRack 481 is a slave unit that includes all of the functionality and features of the DriveRack 480 and incorporates 4 inputs and 8 outputs with Euroblock connectors. However, the 481 does not include the front-panel programming interface. All programming functions can be performed through the 480, the 480R, or via the Windows GUI. An unlimited number of slaves can be chained together.

The dbx DriveRack series offers complete integration of all of the elements required to achieve state-of-the-art loudspeaker management. The 481 DriveRack was designed to provide 4 independent input and 8 output channels of processing power that include 31-band graphic equalizers, as well as dbx's industry-standard dynamics processing. All aspects of the 481's features can be controlled by the included dbx Professional Products Interactive DriveWare software. Software updates can also be downloaded instantly from www.dbxpro.com through the RS 232 port.

The DriveRack 481 includes pre-crossover EQ, dual RTAs, notch filters, speaker delays, multiple crossovers and compression/limiting, as well as numerous other features. Dual RTA analyzers can be run simultaneously with RTA source inputs capable of being remotely switched on the fly.
Restock dbx Driverack 481
Restock dbx Driverack 481

Features

  • 4 input and 8 outputs with routing
  • 31-band graphic or 9-band parametric equalizer on every input (pre-crossover)
  • Dual Real Time Audio Analyzers
  • Butterworth, Bessel, and Linkwitz-Riley crossover filters
  • 27 different crossover configurations
  • Time alignment and transducer alignment delays
  • Compressor/limiter on every output
  • Speaker compensation EQ (post crossover)
  • Multilevel security system
  • Separate house and show EQ with individual lockout
  • Triple redundant back-up of all parameters when running network, 480R and PC GUI
  • TYPE IV Conversion System
  • Electronically balanced/RF filtered Euroblock inputs and outputs
  • Proprietary RS-485 Control Network
  • RS-232 PC interface for computer display and configuration
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WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov.

Specs

  • Inputs
  • Number of Inputs: 4
  • Connectors: Euroblock
  • Type: Electronically balanced/RF filtered
  • Impedance: >40kOhm
  • Maximum Input Level: Hardware selectable for +30, +22, +14, dBu
  • CMRR: >40 dB typical, >55 dB at 1kHz
  • Outputs
  • Number of Outputs: 8
  • Connectors: Euroblock
  • Type: Electronically balanced, RF filtered
  • Impedance: 120 ohm
  • Max Output Level: +25.5 dBu into 1kOhm, +22dBu into 600 ohm
  • A/D Performance
  • Type: dbx Type IV Conversion System
  • Dynamic Range line: >112 dB unweighted, 115 dB A-weighted Type IV
  • Type IV dynamic
  • range:
  • 127 dB with transient material, A-weighted, 22kHz BW
  • 125 dB with transient material, unweighted, 22kHz BW
  • 119 dB typical with program material, A-weighted 22kHz BW
  • Sample Rate: 48kHz
  • A/D Wordlength: 24 bits
  • D/A Performance
  • Dynamic Range: 112 dB unweighted, 115 dB A-weighted
  • Sample Rate: 48kHz
  • D/A Wordlength: 24 bits
  • System Performance
  • Internal Wordlength: 48 bits
  • THD + Noise: 0.003% typical at +4dBu, 1kHz, 0dB input gain
  • Frequency Response: 20Hz-20kHz, +/-0.5dB
  • Interchannel Crosstalk: <-85dB at 1kHz, 0dB input gain
  • Pre EQ
  • Type: One 31-band Graphic EQ per input channel, or 9-band Parametric EQ per input channel RTA can be substituted for EQ in channels 3 and 4
  • Range: +/-12 dB range
  • Notch Filters
  • Number: 1-5 per input channel not to exceed 10 for all input channels
  • Pre Delay
  • Length: 680ms/channel
  • Crossover Type:
  • 1x2, 1x3, 1x4, 1x5, 1x6
  • 2x3, 2x4, 2x5, 2x6, 2x7, 2x8, 3x4, 3x5, 3x6, 3x7, 3x8, 4x6, 4x8
  • Filter Type: Butterworth, Bessel, or Linkwitz-Riley
  • Slope:
  • 6, 12, 18 or 24 dB/octave for Butterworth or Bessel filters
  • 12, 24, 36 or 48 dB/octave for Linkwitz-Riley filters
  • Post EQ
  • Type: Parametric
  • Number: 4 EQ bands per output channel
  • Range: +/-15 dB range
  • Dynamics Type: Compressor/Limiter with PeakStopPlus
  • Attack/Release: Program Dependent
  • Linking: All 8 bands are linkable
  • Post Delay (Driver Alignment) Length: 170 ms per output channel
  • Pink Noise Generator Position: Pink noise inserted on selected input(s)
  • Phase Compensation Number: One per output channel
  • Amount: 0-180 degrees phase shift
  • Output Polarity: Reversible
  • Miscellaneous
  • Output Transformers: Optional
  • Network: Proprietary RS-485 Backbone
  • GUI: RS-232 interface for computer display and configuration
  • Remote: Optional dbx 480R
  • RTA Microphone: Optional
  • ROM Upgrade: Flash upgradeable through RS-232
  • Power Requirements Watts: 100-240V - 50/60Hz 35 Watts
  • Dimensions: 1.75"H x 19"W x 7.90"D
  • Weight: 8 lbs.
  • Shipping Weight: 9.5 lbs.

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