With their simple circuits and low, even zero, levels of loop negative feedback, the sound quality of single-ended triode amplifiers is very dependent on the specific output tubes used. In "<A HREF="http://www.stereophile.com//features/229/">In Search of the Perfect 300B Tube</A>," Peter van Willenswaard finds that not all tubes are created equal. Measured and auditioned in his survey of 300B power tubes are samples from Golden Dragon, JJ Electronics, KR Enterprise, Sovtek, Svetlana, Valve Art, and Western Electric. "If you want the best," sums up Mr. W, "there's only the . . . "&mdash;well, you'll have to read the article to find out!

Retail prices of compact discs are likely to drop in the coming months, thanks to a <A HREF="http://www.ftc.gov/">Federal Trade Commission</A> action ending an industry-wide price-support policy begun five years ago. On May 10, the FTC announced that it had reached an agreement with the "Big Five" of the music business&mdash;Time Warner Inc.'s Warner Music, Seagram Ltd.'s Universal Music, Sony Music Entertainment, BMG Entertainment, and EMI Group PLC&mdash;that will effectively end the practice of "minimum advertised pricing" (MAP) instituted as a response to music-retailing price wars in the mid-1990s. Under MAP, retailers were forbidden to advertise CDs below an established minimum, at the risk of losing millions of promotional dollars from the record labels.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.

I can't resist reading about a company's flagship loudspeaker&mdash;the price-no-object product that embodies the most advanced ideas from a company's research and design department. Flagship loudspeakers tend to be large, heavy, and complex, and are designed to perform best in large rooms; often, each part of each driver is hand-built to the highest level of quality, with precisely tight tolerances. The cost? Don't ask. Some two-channel, audio-only flagships cost more than a BMW M5 sports sedan or a Porsche 911.