search

I used DRA Labs' MLSSA system and a calibrated DPA 4006 microphone to measure the KEF LS50's frequency response in the farfield, and an Earthworks QTC-40 for the nearfield and spatially averaged room responses. My estimate of the LS50 Meta's voltage sensitivity was 84.5dB(B)/2.83V/m, which is the same as that of the original LS50 and within experimental error of the specified 85dB.

The solid trace in fig.1 shows how the Meta's impedance magnitude varies with frequency. Below 200Hz, it is almost identical to that of the 2012 LS50 (fig.2, solid trace), but…

It's hard to believe that it's been 15 years since Stephen Colbert—then of The Colbert Report (pronounced in the French style)—coined the word "truthiness" to describe statements that feel…

Dammit! Tim de Paravicini, the Baron as he was known, passed from this mortal coil on December 17th, 2020. I loved the guy. His deep, steeped, sharp-elbowed engineering bona fides in matters of electronics, cars, planes, and life earned him plaudits from all over the world.

Tim was as tall as a Redwood tree, towering over friends and acquaintances at shows. He was also never short of an opinion. His social graces online, of which there were none, created a good deal of heat and frustration. If he…

I can't remember…

The next record I played, Black Uhuru's Sly & Robbie– produced 1981 album, Red (LP, Mango ZCM 9625), demonstrated that, with the right phono stage and record player, a modest cartridge like the AT-VM95SH is able to play some recordings more effectively than middle- or top-shelf cartridges. In this case, I thought the Audio-Technica's distribution of force, bass weight, transient slam, and…

Marantz offers a matching networked SACD player–DAC, the SACD 30n, which is designed and, according to Marantz, "precisely tuned" to integrate with the Model 30 amplifier. This new streamer-radio-headphone amp–CD player was created to sit handsomely atop the cool-running Model 30, making a complete (except for speakers) audio system designed to add an aura of worldly sophistication to any college professor's home.

I installed the SACD 30n for fun and to get a brief feel for the complete Marantz "30" experience. Setup…

Description: Stereo integrated amplifier with class-D output stage. Line-level inputs (RCA): phono, CD, Tuner, Recorder, Line 1, Line 2, plus amplifier-in. Outputs (RCA): Record, Pre out. Loudspeaker outputs: stereo pair of 3-way binding posts. Power output: 100Wpc (8 ohms), 200Wpc (4 ohms), both equivalent to 20dBW. Damping factor: 500. Power consumption: 130 watts.
Dimensions: 17.4" (443mm) W × 5.1" (130mm) H × 17" (432mm) D. Weight: 32lb.
Finish: Black or Silver Gold.
Serial number of unit reviewed: MBBKO 072000035. "Made in Japan."
Price: $…

Analog sources: Dr. Feickert Analogue Blackbird turntable with Schick 10.5" tonearm, Audio-Technica AT-VM95E/ ML, Ortofon 2M Black moving-magnet cartridges; Zu Audio Zu/DL-103 Mk.II, Rev-B moving-coil cartridge.
Digital sources: Apple Mac mini computer running Audirvana+; HoloAudio May (Level 3) D/A processor; Marantz SACD 30n; Itona USB 3.0 Isolator.
Integrated amplifiers: Yamaha A-S3200, Rogue Audio Sphinx V3.
Loudspeakers: Magnepan .7, GoldenEar BRX, Harbeth P3ESR, Falcon Acoustics LS3/5a.
Headphones: HiFiMan Susvara, Focal Clear.
…

I tested the Marantz Model 30 with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). I looked first at its behavior via its line inputs, mostly with the volume control set to its maximum of "0.0," then at lower settings. (The volume control operates in accurate 0.5dB steps.) As the Model 30's power inlet lacks a ground connection, I connected a wire from the analyzer ground to the ground terminal on the amplifier's rear panel, to minimize power supply noise, which would otherwise be a problem with the phono input. Because the Model 30…

Like many manufacturers, Mr. Gläss relied upon outside vendors to supply some of the internals, including the pump, which pushes the water up from the reservoir and into the cleaning chamber. Unfortunately for Mr.…