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Muzio: We're working to be compatible with every known valid technology. We don't experiment with our customers on immature technologies. Everything we've always done has been a little bit late. We didn't introduce our first Levinson digital processor until 1990, and it was after we had gained experience with Proceed processors.

Lander: You've said your product-development cycle runs up to 18 months or more. How do you know when it's time to begin work on a Levinson product that incorporates a new…

Kathleen and I, having flung ourselves into single-ended's embrace, have become, to some fashion, quite experienced. I've described the purity of presentation available with the Wavelength Audio Cardinal XS monoblocks when coupled with the Swiss-made Reference 3A Royal Master Controls in these…

The MI Ag works at least as well on the Wavelength XS monos, and we'll see what happens with the Audio Note Kasai. I'll try them with push-pull eventually—I've got…

It was a great pleasure auditioning so many 300B tubes. Here are thumbnails of our experiences with them.

Western Electric 300B: In the way that audio can be anthropomorphic, I'll say these guys are suave, baby. Dean Martin, Sammy, and Frank—the rat pack. The Pierce Brosnan double-oh seven of 300Bs. Or a Ralph Lauren Polo type. Older guy—an arbitrageur—with impeccable style and the cash to indulge it. The tubes are beautifully made and presented—check the serial number on the tube and its box for authenticity. (This is one tube sure to be knocked-off.)…

When I measured the Wavelength Cardinal, another single-ended tube amplifier, I commented on its poor test-bench results and noted that it might have been a hot design in 1940. It's only fair that I make the same comment about the Jadis. The Jadis also measures worse than the Wavelength in one very significant way; it has a severely compromised bass response. Though I haven't heard the Jadis horn loudspeaker, which JS used in his review, many commercial horn loudspeakers don't have a very extended bass. [Note JS's auditioning comments about the system'…

The amplifier measurements here were made using the tubes JS found to be the best-sounding: Western Electric 300B, GE 5692, and RCA 5R4GB.

The Jadis SE300B was warmed up for 1 hour at 1/3 of its rated maximum power of 10W. Nothing unusual was observed in this pretest; the 300B ran typically hot for a tube amplifier. Its input impedance measured a high 135k ohms. The output impedance was 2.5 ohms at 1kHz, 2.7 ohms at 20kHz, and 0.76 ohms at 20Hz. This amplifier's frequency response will be very dependent on the loudspeaker load. Voltage gain into 8 ohms was…

Description: Single-ended triode monoblock amplifier: Tube complement (each): 2 x 300B, 2 x 5R4, 1 x 6SN7. Output impedance: adjustable, for 1–16 ohms. Output power at 1kHz for 0.3% THD: 10W RMS (10dBW). Power bandwidth at 8W: 40Hz–15kHz &#150 dB; 40Hz–30kHz –3dB. Input sensitivity for rated output: 450mV RMS. Input impedance >100k ohms. Power consumption 140W each.
Dimensions: 8" (203mm) W by 9" (229mm) H by 20.5" (521mm) D. Weight: 65 lbs (29.5kg).
Price: $13,000/pair (1996); no longer available (2012).
Manufacturer: Jadis S.A.R.L.,…

A true story: I got tagged for doing a howling 90mph on the way back to New York on the Jersey Turnpike late one night and got off with a warning.

I was pulled over by a beefy young Trooper, lights blinking furiously. Oops. [heh heh]. He saw Kathleen and I weren't nuts, checked the papers and my license, then checked out the Lexus very carefully with his flashlight. There was much oohing and ahhing.

"Got a GPS (Global Positioning System) I see," he said.

"Yeah, officer, the SC 430 is only one of two in the New York area, the…

"Ummmm . . . that sounds weird."

Rock musicians—do they ever think about anything but sex?

Rush guitarist Alex Lifeson chuckles. He explains that what he meant to say was that he, singer-bassist Geddy Lee, and the exalted, formerly mustachioed object of Planet Earth's most fervent drummer cult, Neil Peart, were trying to write songs during a break in a recent tour.

Easily one of the music world's most polarizing acts, the objects of equal amounts of swooning and derision, Rush has become a rock institution. Those…