DEFINIMAX 4018LF 18" Professional Series Speaker - Low Distortion PA Woofer

Recommended for professional audio and bass as a high-power, low-distortion subwoofer in single or multi-driver designs.

Subwoofer | Pro Audio

Box Type: Vented | Scoop Loading | Horn Loading

Eminence Speaker Footnotes

From dialing a sound in, to rocking it out, Eminence professional audio and musical instrument loudspeakers have been the leading choice in audio applications worldwide since 1966. Eminence is dedicated to providing the best quality, value and service to meet your needs. Nowhere is that mission more evident than in their wide product selection, industry leading seven-year warranty, and unrivaled customer support. Designed and assembled by hand in the USA, Eminence is the most trusted name in the industry. Find out why the world’s premier brands and countless audio enthusiasts and musicians rely on Eminence.

Emininece Speaker Tech Notes

Multiple units exceed published ratings evaluated under EIA 426A specification while tested in a free-air, non-temperature-controlled environment. Multiple compression drivers exceeded published ratings evaluated under EIA-426A or AES specification while mounted on Eminence’s H290, H290S, or H2EA horn in a non-temperature-controlled environment.

Eminence Speaker frequency response curves are an average of multiple units measured while applying 1W/1m into the speakers’ nominal impedance (e.g. 2.83V/8Ω, 4V/16Ω, etc.).  All speakers are measured in a temperature controlled environment using monthly calibrated LMS software with supplied 0.25" microphone mounted on axis 1m distance from baffle.  2 ft. x 2 ft. baffle is flush with anechoic wall and speaker is rear mounted against a thin steel ring for minimum diffraction.  Measurements performed using monthly calibrated Yamaha P3500S amplifier and a 2700 cubic foot anechoic chamber with custom made fiberglass surface treatments.  Measurements below 200Hz are tail corrected to compensate for chamber volume.  Compression drivers measured using a 2ft x 2ft baffle flush with anechoic wall and horn front mounted.

Please note: BETA 8CX, 10CX and 12CX are coaxial speakers with tweeter sold separately. The data for these coaxial woofers was calculated with the ASD:1001 driver screwed into the woofer, but not active.

Prices, specifications and product cosmetics are subject to change without notice.