JBL Everest (c. 1986)

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

Overview

The JBL Everest DD55000 is a floor-standing speaker system developed around 1986 as part of Project Everest, a JBL initiative to create a successor to the Paragon. The goal was wider dynamic range and more accurate stereo imaging. JBL used advanced acoustic analysis, including computer modeling, and drew on its foundational horn designs. It is a 3-way, bass-reflex system with a precisely angled driver array that gives a wide soundfield. It was the first large speaker in the Project Everest lineup, and it took JBL's professional audio heritage into a 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 the drivers mounted at set angles to control dispersion. The 2425H midrange and 150-4H woofer sit at 30°, and the 2405H tweeter sits at 60° toward the front. The midrange horn is based on JBL's Differentiated Coverrange Horn technology, refined from the professional 4660 model. Its complex curvature produces an asymmetrical trapezoidal radiation pattern for better stereo imaging. The high-frequency section uses the horn-loaded 2405H driver, a high-efficiency compression driver design.

Context

The DD55000 was conceived as a spiritual successor to the JBL Paragon. It aimed to surpass the Paragon by combining classic acoustic principles with modern computational analysis. As the first large speaker in Project Everest, it was JBL's most ambitious consumer speaker development at the time, focused on dynamic range and precise stereo image coverage. The project team revisited earlier designs like the Paragon and Hartsfield and used contemporary tools to refine performance while keeping JBL's signature sonic character.