Polk Audio R.T.A. 12C loudspeakers with US made Peerless (black faceplate/55142183/made Nov.15, 1983) tweeters. I replaced the Polk brand SL-1000 (silver faceplate) with Peerless, which came from a set of Monitor 7 speakers.
Polk Audio Model 11 (R.T.A. 11) loudspeakers. Rear of cabinets designate left and right channels. Larger passive radiator than the Monitor 10 speakers and in cabinets resembling the later RTA 12 with risers.
Polk Audio Monitor 7C with Peerless tweeters (in place of the original SL1000 silver-faced tweets); 1984
Polk Audio Monitor 7C with replacement RD0194-1 tweeters (originally had SL2000) and beveled front cabinet corners from 1987. Also replaced mid drivers with current Polk drivers.
Polk Audio Monitor 5A with SL1000 silver-faced tweeters (in place of the original peerless)