Acoustic Research Edge Sequel (1988–1991)

A compact, weather-resistant bookshelf speaker with a neutral sound profile, part of AR's effort to deliver high fidelity at an affordable price.

Overview

The Acoustic Research Edge Sequel is a bookshelf loudspeaker produced from 1988 to 1991 as part of AR’s EDGE series, which aimed to provide efficient, high-fidelity sound for budget-conscious audiophiles. Designed for both indoor and outdoor use, it features a weather-resistant build thanks to its injection-molded ABS resin enclosure. The speaker delivers a clean, balanced sound with tight bass and clear mids, marking a shift from the warmer tonality of earlier AR models toward a more neutral, transparent audio signature. It was used in both consumer and research settings, including stereo playback setups in scientific experiments.

Specifications

Enclosure Type	Acoustic Suspension System
Woofer	4-1/2" (11.4 cm) cone type with rubber surround
Tweeter	1" polycarbonate dome type
Frequency Response	120 Hz to 20 kHz ± 3 dB
Sensitivity	89 dB (2.83V/1m)
Impedance	8 Ω
Power Handling (RMS)	100W
Crossover Frequency	4.2kHz
External Dimensions	7-1/2"H x 5-1/2"W x 4-13/16"D (190mm x 140mm x 122mm)
Weight	1.5kg
Cabinet Design	Non-parallel walls to reduce internal standing waves
Internal Damping	Acoustic Blanket material
Crossover Design	Phase-coherent 2nd-order network
Warranty	5 Years (parts)

Design

The Edge Sequel uses an injection-molded ABS resin enclosure for durability and weather resistance, making it suitable for both indoor and outdoor environments. It features a 2-way design with a 4-1/2" woofer and 1" polycarbonate dome tweeter, both with anti-magnetic construction. The phase-coherent crossover ensures time alignment between drivers, while non-parallel cabinet walls and internal acoustic blanket damping reduce resonance and standing waves. The speaker includes a rotating stand/bracket for flexible placement.

Context

Released in 1988, the Edge Sequel was part of Acoustic Research’s strategy to stay competitive in a changing audio market by offering high-fidelity performance at an accessible price. It represented a sonic shift toward neutrality, contrasting with the warmer sound of classic AR models. Designed for versatility, it was marketed for use in stereo systems, home theater setups, and outdoor installations.

Market

The Edge Sequel is moderately collectible, with working pairs typically selling for $100–$250. Common maintenance issues include dried ferrofluid in the tweeters, degraded electrolytic capacitors in the crossover, disintegrating foam grilles, and corroded or loose binding posts. Fully restored units with component upgrades may command higher prices.