Advent Large Advent (1970)
An improved version of the original Advent Loudspeaker, with a 12-inch woofer and an enhanced crossover in a larger acoustic suspension cabinet.
Overview
Advent Corporation introduced the Large Advent in 1970. It builds directly on the original Advent Loudspeaker (1968). It was designed as an upgraded alternative with a larger cabinet and a 12-inch woofer, offering deeper bass and higher output capability while keeping the acoustic suspension principle that defined Advent's sound. The exact model designation "A3" does not appear in the source material, which calls it simply the "Large Advent (1970)". It sits above the original model in both size and performance. The enclosure is sealed (acoustic suspension), a design Henry Kloss championed and carried over from his work at Acoustic Research and KLH. That gives tight, controlled low-frequency response without a port.
Design
The Large Advent has a 12-inch woofer in a larger cabinet than the original Advent's 10-inch version, which extends the bass. It also has an enhanced crossover network, described as "better" than the original, which improves driver integration and overall sonic coherence. Like its predecessor, it relies on acoustic suspension loading. The sound follows what audiophiles later called the "New England sound" - a warm, full-bodied tonality with natural bass that avoids bloat or overhang, a direct descendant of Kloss's earlier high-fidelity work.
Context
Henry Kloss founded Advent Corporation in Cambridge, Massachusetts in 1967 to deliver high-fidelity audio performance at accessible prices. The Large Advent (1970) improved on the original Advent Loudspeaker (1968), which had already shown that affordable speakers could deliver meaningful bass response down to 40 Hz. The Large Advent offered a more powerful alternative for listeners who wanted greater dynamics and low-end extension. It sat above the original model in the product hierarchy, while later offerings like the Advent/2 (1970) and Advent/3 (1972) were smaller and more budget-friendly. The New Advent (1977) eventually replaced these earlier designs with a complete overhaul.
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