Infinity RS-4B
Not much is documented about the Infinity RS-4B beyond one thorough review in Audio magazine, published in April 1986. It is the clearest picture there is of this floor-standing model from Infinity's Reference Standard series.
The RS-4B was a three-way system priced at $1,078 per pair. Each speaker stood 42 inches tall on a 15 by 11 inch footprint, and a pair weighed 110 pounds. That is modest next to Infinity's flagship IRS systems of the same era. It used an EMIT tweeter and a polypropylene woofer. Exact driver sizes and crossover points are not recorded in available sources. Audio (April 1986, p.84) said the RS-4B did not produce an exceptionally large soundstage, but its soundstage proportions, depth, and imaging were good. The review described the frequency balance as roughly fifth-row to mid-hall, with a slightly forward character.
Almost nothing else survives in the archival record. There are no production years, no complete specification sheet, and no coverage from other periodicals that has been tracked down so far.
Known facts:
- Type: Three-way floor-standing loudspeaker
- Original price: $1,078 per pair
- Dimensions: 42 × 15 × 11 inches (H×W×D)
- Weight: 110 lbs per pair
- Tweeter: EMIT (Electromagnetic Induction Tweeter)
- Woofer: Polypropylene cone
- Period reference: Audio, April 1986, p.84 (Equipment Profile / "Auricle")
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