Polk CS-100
A compact center channel that Polk gave away in early-'90s promotions — and that still earns its place under a vintage TV.
Overview
The CS-100 is a center channel speaker from Polk Audio, and the most telling thing about it is how the company chose to move units: Polk ran promotions offering the CS-100 free or at half price with the purchase of a pair of its home speakers and a receiver. A speaker handed out as a bonus could easily be an afterthought. This one wasn't. The design details — a half-trapezoid cabinet, dual small woofers flanking a dome tweeter, a single vent at one end of the baffle — suggest a purpose-built center channel rather than a repurposed bookshelf box.
HiFi-Stereo (April 1993, p.65) described the CS-100 as compact, unobtrusively styled, and intelligently fashioned, noting that the half-trapezoid profile permits either level monitor-top placement or an under-monitor location with a desirable upward tilt. That angled cabinet is the whole point: a center channel lives on or beneath a television, and the geometry aims the driver array at the listener rather than at the wall behind the set. The review also noted the cabinet's matte black finish and black grille — plain, functional, and easy to live with next to a CRT.
The driver complement as reported in that same review is dual 4-inch woofers flanking a dome tweeter, with connections made via push-terminals on the back panel. Polk's own advertising from the period described the CS-100 as featuring two high definition 4.5-inch drivers and a dome tweeter, and billed it as providing full-range performance and rich detail for on-screen action and dialogue (Audio, May 1993, p.39). The discrepancy between 4-inch and 4.5-inch in the two accounts is the kind of thing that happens when ad copy and review-bench measurements don't quite line up; collectors should treat the exact woofer diameter as approximate unless a service manual surfaces.
On sound, HiFi-Stereo (April 1993, p.65) found the CS-100 quite clear and well balanced, but candidly noted it did not have the low-end impact of some of the costlier, larger-driver designs. That is an honest verdict for a center channel of this size, and it tells you what the speaker is for: dialogue intelligibility and midband clarity, not home-theater rumble. Paired with a proper subwoofer and Polk fronts, the CS-100 does the job it was designed to do.
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