Infinity RS-6B (1979)

Name: Infinity RS-6B
Brand: Infinity

A 3-way vintage loudspeaker from Infinity’s Reference Standard series, known for its EMIT tweeter and 8-inch woofer—still turning heads in audiophile circles.

Overview

The Infinity RS-6B isn’t the kind of speaker that screams for attention, but if you know what to listen for, it whispers something special. This 3-way loudspeaker emerged from Infinity Systems, a company built on audacious engineering and a refusal to settle for the status quo. While the exact production year isn’t confirmed in the records, its placement among the Reference Standard series—a lineage that defined Infinity’s high-end ambitions through the 1970s and 1980s—tells you everything you need to know about its pedigree. It sits alongside models like the RS 1, RS 2, RS 3, RS 4.5, RS 5, RS 5000, RS 6000, and RS 6000a, a family tree rooted in precision and power.

Owners report a speaker that defies its age, with one recent buyer writing, “I bought Infinity RS-6Bs 4 days ago and wow.” That kind of reaction isn’t just nostalgia—it’s a testament to the design integrity baked into these cabinets. The RS-6B was never meant to be a minimalist bookshelf curiosity; it was built to deliver full-range sound with authority, and it does so with an 8-inch woofer that, according to user reports, “goes pretty low” and handles the midrange with clarity. Whether it was used in a dedicated listening room or anchored a high-end stereo setup in the late ’70s or early ’80s, the RS-6B carried the weight of Infinity’s reputation: no compromises, no fluff, just engineered sound.

Specifications

Manufacturer	Infinity Systems
Model	RS-6B
Type	3-way loudspeakers
Woofer Size	8 inch woofer

Historical Context

Infinity Systems was founded in 1968 in Los Angeles, California by Arnie Nudell, Cary Christie, and John Ulrick—a trio whose obsession with speaker design would push the boundaries of what was possible in home audio. The Reference Standard series, spanning the 1970s and 1980s, became the proving ground for their most advanced ideas, and the RS-6B is listed in the “Classic Models Reference” table, confirming its place within that elite group. These weren’t mass-market speakers; they were statements. While the fact sheet doesn’t detail the RS-6B’s exact role in the lineup—whether it was an entry point, a mid-tier performer, or a flagship—the company’s trajectory during this era suggests it was engineered with the same rigor as its more famous siblings.

Collectibility & Value

Today, the RS-6B trades in a niche but dedicated market. A pair was listed for $399 on Reverb on March 6, 2026, described as “Vintage Infinity RS-6B Speaker Pair (Emit Tweeters),” while another appeared on Kleinanzeigen on September 1, 2025, priced at €650. Listings in Norway (Finn) and Bulgaria (Bazar BG) show asking prices ranging from NOK 3,500 to BGN 300, indicating regional variability but consistent demand among European collectors. The most common maintenance issue reported is the need for refoaming—standard for vintage speakers of this age. However, a more serious concern looms for Infinity owners of this era: as noted in a Reddit comment, “The problem now is the 10/12 in woofer Al near impossible to replace.” While the RS-6B uses an 8-inch driver, this warning underscores the broader challenge of sourcing original parts for vintage Infinity hardware. Refurbished pairs with working EMIT tweeters and refoamed woofers are likely to hold the most value.