Infinity RS-6B (1979)

A 3-way vintage loudspeaker from Infinity's Reference Standard series, with an EMIT tweeter and an 8-inch woofer.

Overview

The Infinity RS-6B is a 3-way loudspeaker from Infinity Systems. The exact production year isn't confirmed in the records. It belongs to the Reference Standard series, which ran through the 1970s and 1980s. The same family includes the RS 1, RS 2, RS 3, RS 4.5, RS 5, RS 5000, RS 6000, and RS 6000a.

Owners report a speaker that holds up well for its age. One recent buyer wrote, "I bought Infinity RS-6Bs 4 days ago and wow." The RS-6B was built to deliver full-range sound, and the 8-inch woofer, according to user reports, "goes pretty low" and handles the midrange with clarity. It likely went into a dedicated listening room or a high-end stereo setup in the late '70s or early '80s.

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. The Reference Standard series, spanning the 1970s and 1980s, was where they put their most advanced ideas. The RS-6B is listed in the "Classic Models Reference" table, which confirms its place in that group. The fact sheet doesn't say where the RS-6B sat in the lineup - entry point, mid-tier or flagship - so that stays open.

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, which is standard for vintage speakers of this age. A bigger concern for Infinity owners of this era came up in a Reddit comment: "The problem now is the 10/12 in woofer Al near impossible to replace." The RS-6B uses an 8-inch driver, but the warning points to the same problem with sourcing original parts for vintage Infinity hardware. Refurbished pairs with working EMIT tweeters and refoamed woofers are likely to hold the most value.

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