JBL Everest (c. 1986)

A flagship floor-standing speaker system developed as the first large model of Project Everest, designed to surpass the legendary Paragon.

Overview

The JBL Everest DD55000 is a high-end floor-standing speaker system developed around 1986 as part of Project Everest, a JBL initiative to create a successor to the iconic Paragon. Built with an emphasis on expanding the dynamic range and stereo imaging accuracy, it was engineered using advanced acoustic analysis methods, including computer modeling, while drawing on foundational JBL horn designs. This 3-way, bass-reflex system features a precisely angled driver array to deliver a wide, immersive soundfield. It stands as the first large speaker in the Project Everest lineup, representing a direct evolution of JBL’s professional audio heritage into the ultimate consumer format.

Specifications

Manufacturer	JBL
Product type	Speaker system, 3-Way, 3-Speaker, Bass Reflex System, Floor Type
Woofer	38 cm Cone Type (150-4H)
Midrange	Horn Type (2425H + 2346-1)
Tweeter	Horn Type (2405H)
Impedance	8 Ω
Sound pressure level	100dB SPL (1W/1m)
Allowable input	250W
Crossover frequency	850 Hz (12dB/oct), 7.5 kHz (12dB/oct)
External dimensions	Width 920 x Height 1,410 x Depth 510 mm
Weight	145kg
Original price	¥1,350,000 (c. 1986)

Design

The Everest DD55000 uses a bass-reflex enclosure with drivers mounted at specific angles to optimize dispersion: the 2425H midrange and 150-4H woofer are positioned at 30°, and the 2405H tweeter at 60° toward the front. The midrange horn is based on JBL’s Differentiated Coverrange Horn technology, refined from the professional 4660 model, and designed to produce an asymmetrical trapezoidal radiation pattern through complex curvature for superior stereo imaging. The high-frequency section employs the horn-loaded 2405H driver, a hallmark of JBL’s high-efficiency compression driver design.

Context

The DD55000 was conceived as a spiritual successor to the JBL Paragon, aiming to transcend its legacy by combining classic acoustic principles with modern computational analysis. As the first large speaker in Project Everest, it represented JBL’s most ambitious consumer speaker development at the time, focused on achieving unparalleled dynamic range and precise stereo image coverage. The project team revisited foundational designs like the Paragon and Hartsfield, using contemporary tools to refine performance while maintaining JBL’s signature sonic character.

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