The dbx DriveRack PA+ is a loudspeaker management system designed to provide crossover, equalization, compression, limiting and feedback suppression between a mixing console and power amplifiers.

Crossover:  supports 2x3, 2x4, 2x5, 2x6 configurations.

EQ/Dynamics:  Graphic EQ, parametric EQ (input), classic dox compression, and output limiters

Includes a dedicated sub-harmonic synthesizer

Full-time RTA function (requires optional dox RTA-M microphone)

mostly front-panel controlled, whereas the PA2 which has networking and mobile control.

the dox DriveRack PA+ is the most effective way to manage all aspects of Loudspeaker management for Public Address system applications.  The DriveRack PA+ essentially becomes the only device that you will need between your mixer and your power amps.  Here are some of its features:

*Setup Wizard Steps Through Speaker and Amp Selection and Levels
*Auto Level Wizard Balances Your System
*Auto EQ Wizard with 28-Band RTA Tunes Your system for the venue
*AFS Wizard Helps Eliminate Feedback
*Stereo Feedback Elimination with 12 feedback notch filters
*dbx 12A Sub-harmonic synthesizer
*Classic dbx Input Compression
*JBL Speaker and Crown Power Amp tunings included
*USB Firmware and Speaker Tunings Field Updatable with Harman HiQnet System Architect
*Full time RTA function
Front-Panel Output Mutes
*Pink Noise Generator (used with Auto EQ and Auto Level Wizards)
*Linked Stereo DSP Processing for ease of use
*24-Bit ADC/24-Bit DAC, >113 dB Dynamic Range
*2-channel XLR input and 6-channel XLR Output
*2x2, 2x3,2x4, 2x5, 2x6 Crossover Configurations
*Dual 28-band Graphic EQ-linked or Dual Mono
And more...