ART Applied Research and Technology 355 Dual 31-Band Graphic Equalizer - 2U Rack Unit

Up for sale is an ART 355 Dual 31-Band Graphic Equalizer. This rugged 2U rackmount processor is a versatile workhorse, perfect for tuning live sound PAs, dialing in stage monitors, balancing DJ systems, or managing permanent commercial audio installations.

Built with precision Constant-Q circuitry boasting a 3% center frequency accuracy, the ART 355 delivers clean, smooth, and predictable frequency adjustment across the entire audio spectrum. This model is highly prized for its exceptional connectivity flexibility; as shown on the rear panel, it handles everything from professional balanced pro rigs to consumer unbalanced gear without needing annoying adapters.

Key Performance Features:

 Dual 31-Band Channels: 1/3-octave graphic EQ faders with center detents for smooth, intuitive frequency shaping from 20Hz to 20kHz.

 Selectable Gain Range Switch: Quickly toggle the fader sensitivity between ±6dB for precise room tuning or ±12dB for aggressive acoustic problem solving.

 Variable High-Pass & Low-Pass Filters: Independent front-panel sweep control knobs let you roll off low-end stage rumble (10Hz–250Hz) and high-frequency edge/hiss (3kHz–40kHz).

 Channel Bypass & Clipping Indicators: Front-panel bypass switches with LED status indicators let you A/B changes instantly, while dedicated clip LEDs warn you of signal overload.

Rear Panel Technical Specs & Connections:

 Balanced Inputs & Outputs: (2) XLR Input/Output Jacks & (2) 1/4" TRS Input/Output Jacks (active balanced, ultra-low-noise design).

 Unbalanced Inputs & Outputs: (2) RCA Input/Output Jacks (ideal for consumer gear, media players, and DJ equipment).

 Ground Lift Switch: Rear panel toggle switch to instantly solve ground-loop hum issues.

 Power Supply: Heavy-duty internal power supply with an attached power cord.

 Chassis: Rugged all-steel construction, standard 2U rack space size.