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The speakers for all seasons

Quest Engineering has a long pedigree in live sound. Fullrange sound coverage at high SPL over long durations is our business.

Quest engineers have applied the knowledge base from this heavy duty training ground to commercial audio, and theresults speak for themselves.

Durability, reliability, ease of installation and sonic excellence; as demanded by the discriminating community thatrepresents the commercial audio market.

Sound Designers will love the versatility of the M series.

Three model ranges developed in close consultation with contracting installation specialists make the M series a handy tool when applied to the broad requirements of today’s sophisticated commercial sound market

The objective for the designers of MS series Indoor/Outdoor line-up was to take the compact wall mount speaker to a new standard of value and performance.

The result is refined appearance, high fidelity vocal andmusic reproduction and easy installation/service.
The MS Series all-weather loudspeakers are the ideal choice for supplying high fidelity sound for discreet indoorand outdoor applications.

Their advanced polymer housing is designed to be acoustically inert and withstand harsh outdoor and maritime environments.

Mounting hardware and grills are aluminum to drastically reduce corrosion.

The vented cabinet design and high-compliance woofers generate realistic bass response in open air applications and the high-efficiency soft dome tweeters yield extended highfrequency response.

Whether low impedance or 70/100 volt line installation, custom designed drivers and matching passive circuitry enables MS series indoor/outdoor loudspeakers to provide levels of vocal clarity and bass performance that substantially exceed their physical size.


  • Quest MS (Speaker Box) Specifications MS 401
  • Available in Black or White
  • Peak Power 100 W
  • Power Handling 50 W
  • Type Bass Reflex
  • Impedance Nominal 8 OHM
  • Transformer Tappings 25 W / 20 W / 15 W / 10 W + 8Ω Direct
  • Components LF 4” Poly Propylene Cone,
  • Surround, 25 mm Voice Coil Surround,
  • Components HF Dome Tweeter, PEI Diaphragm, 20 mm Voicecoil
  • Angle of Coverage 90° x 90°
  • Sensitivity 1W @1 meter 88 dB
  • Max SPL 108 dB
  • Frequency Response 80 Hz - 20 Khz ± 4 dB
  • Crossover Frequency 3000 Hz
  • Crossover 12 dB
  • Enclosure Material UV Stabilised ABS
  • Brackets Material Aluminium
  • Grille Material Aluminium
  • Dimensions WxHxD 153 mm x 278 mm x 180.5mm
  • Net Weight 2.6 kg
  • Shipping Dimensions WxHxD 203 mm x 319 mm x 226 mm
  • Shipping Weight 3.3 kg


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