There aren't many companies on the high end that make receivers, Rotel would be one of the highest, along with Lexicon (which is really just an H/K that says Lexicon on it). Companies like Yamaha, Denon, Onkyo, Pioneer all have flagships which pretty much are top dogs in terms of bells/wistles and power in the receiver market. Companies like Krell, Linn, and countless others pretty much stay away from the receiver market and deal primarily in seperates.
Outlaw, Sunfire, NAD, Cambridge Audio, Arcam, Rotel would be a brief outline of high end specific brands, meaning their low end is still considered to be "high end".
Onkyo & Integra, Sony & ES, Pioneer & Elite, Harman Kardon, Denon, Marantz, Yamaha, Sherwood and a few others are the well known wide range products producers. They make high and low end receivers to cover both ends of the spectrum, both very high and low ends.
Kenwood is no longer producing home audio receivers.
Panasonic rarely produces a worthwhile audio product, especially receivers (if cost effectiveness is remotely concerned)
JVC is pretty slow right now. A few years ago they released a very solid high end line of receivers, but publicity lacked and the line failed. The expensive production costs and slow turnover killed the last great JVC audio products to grace Victor corp.
Sansui, technically died in the early 80's. Funai now produces some video products using the Sansui name being sold at Wal-Mart and other retailers. They basically are nothing.
Insignia, Best Buy's in house brand electronics. Their receivers are outsourced to the most cost effective solution (meaning decent quality enough to not be returned within warranty, but still cheap). Sherwood has produced Insignia's last two lines of receivers.
KLH, died after Henry Kloss left the company. Some people in California revitlized the name for selling garbage speakers and even trashier receivers (which RCA utilized the same OEM for a short while in the late 90's.
Tandy got a bit smart and marketed the Optimus brand and shortly after RCA professional at RadioShack, they where Pioneer OEMs. The line has since died and was replaced with Acurian, which is some cheap difficult to spell Asian OEM.
Just a little history and current affairs.
