ART HQ231
Graphic EQ
Equalizer$275Manufacturer list price
Specifications
- Type
- Equalizer
- Description
- Graphic EQ
- Topology
- solid-state
- Signal path
- Analog
- Channels
- 2
- Channel format
- stereo
- Form factor
- rack
- Rack units
- 1
- Powered
- true
- Frequency response
- 20Hz-20kHz, +/-0.5dB
- Impedance (Ω)
- 20000
Details
Controls: 31 sliders per channel (6dB or 12dB selectable range), independent variable Hi Pass (low cut) and Low Pass (high cut) filters, variable input level control, passive bypass switch, ground lift switch, selectable line voltage switch
I/O: Active balanced XLR and unbalanced 1/4" inputs/outputs per channel
Notable use: Well-known live-sound graphic EQ used for feedback suppression on stage and FOH systems
Notes: CONFIRMED DISCONTINUED: HQ231 is permanently discontinued per multiple dealer listings (Pitbull Audio, Sweetwater legacy listing, zZounds) and is not present on the current artproaudio.com/eq-&-crossovers navigation. Product page itself returned only nav/footer content on WebFetch (no live spec sheet), so specs were sourced via web search of dealer/manual listings (Perfect Circuit, Sound on Sound, Amazon listing, zZounds). Filter type is Constant Q, 1/3-octave ISO spacing, 2x31 bands, with ART's proprietary FDC (Feedback Detection Circuit) that lights an LED on the band with the greatest sustained/feedback-prone signal -- this is a feedback-detection aid, not automatic notch filtering. price_usd=$275 is a SECONDARY-MARKET REFERENCE PRICE (open-box/used eBay listing found via search), NOT a current list price, since the item is discontinued and no new-unit price exists. impedance_ohms reflects input impedance only (typical spec pages do not separately state output impedance). distributors URL is for the ART brand/dealer network generally since this specific item is discontinued and not sold through current dealers.