Quest Qi18S 18-Inch Installation Subwoofer
Quest Qi18S 18-Inch Installation Subwoofer
Quest Qi18S 18-Inch Installation Subwoofer

Quest Qi18S 18-Inch Installation Subwoofer

Brand: Quest
Categories: Subwoofers
SKU: QI18S

The Qi18S is the largest subwoofer in the Qi Series, built for demanding music playback and sound reinforcement in fixed installations that need deep, high-output bass from a hidden-placement enclosure. A high-power, ultra-long-excursion 18-inch driver delivers exceptional low-frequency extension with clarity and authority, housed in a robust, low-profile hardwood cabinet.

Pairs well with

Technical Specifications

Build and Mounting

Finished in marine plywood with a polyurea coating and an aluminium grille with acoustic fabric cover. Speakon and Euroblock connectivity allow flexible installation across a wide range of system designs.

Amplifier Compatibility

Optimised for seamless integration with Qi Series loudspeakers and Quest QXD amplifiers, featuring dedicated DSP presets and advanced control. Runs at 8 ohms.

Applications

Suited to demanding music playback and sound reinforcement installs needing the deepest, highest-output bass extension in the Qi Series.

Key Specifications

  • Driver Configuration: 18" ultra-long-excursion woofer
  • Impedance: 8 ohms
  • Dispersion: Omnidirectional
  • Power Handling (RMS/Peak): 1200W / 2400W
  • Frequency Response (-6dB): 35Hz to 140Hz
  • Sensitivity (1W @ 1m): 100.6dB
  • Maximum SPL @ 1m: 137.4dB
  • Connectivity: Speakon and Euroblock; Euroblock connector and cover plate included
  • Cabinet Material and Finish: Marine plywood with polyurea coating; aluminium grille with acoustic fabric cover
  • Amplifier Compatibility: Quest QXD Series amplifiers with dedicated DSP presets (or Quest QX Series)
  • Dimensions: 510 x 790 x 600mm (H x W x D)
  • Weight: 46.7kg
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