Back in the Dark Ages, loudspeaker design was commonly based on semi-enlightened experimentation, with new enclosure configurations appearing almost monthly in professional and consumer journals. One of those, published in Wireless World in October of 1965, was A.R. Bailey's transmission line, a long, selectively resistive, folded-and-sometimes-tapered tube that loaded the back of the (woofer) driver for low-bass reinforcement.

It may come as no surprise that the two Recommended Components issues we publish every year, in April and October, are Stereophile's most popular. Both go hand-in-hand with increases in single-copy sales and subscription requests, and it's worth noting that equipment and record suppliers line up to get their ads into those issues.

The High End 2020 show, scheduled to take place in Munich in mid-May, was canceled due to concerns about the coronavirus. The California Audio Show, which usually takes place in late July, is also off, although the reason for its cancelation isn't clear. And as we've just learned, AXPONA, the biggest show in the Western Hemisphere, has been postponed from its original dates (around the time this issue hits mailboxes and newsstands) to the second weekend of August.

The reason, of course, is concern about the spread of COVID-19.

Frank Zappa: The Hot Rats Sessions
Zappa Records/UMe ZR20032 (6 CDs). 1969–2019. Frank Zappa, prod.; Joe Travers, Craig Parker Adams, Jack Hunt, others, engs.
Performance *****
Sonics ****

Frank Zappa's first real solo album (he conducted but did not play on Lumpy Gravy) is probably his greatest recording and perhaps his most uncharacteristic in that his singing voice is nowhere to be heard. The one vocal, "Willie the Pimp," is sung by Captain Beefheart, whose Zappa-produced pinnacle Trout Mask Replica was released the same year (1969).