search

Almost six months after purchasing French audio manufacturer Jadis from Jean-Christophe Calmettes, Jérémie Malfroot, 48, announced a lifetime warranty for the company's output transformers and 10-year warranties on all other parts.

"I did it to differentiate ourselves, and to explain to the customer that at Jadis, we care for the next generation," Malfroot told Stereophile. "You don't need to buy a new amplifier; you can just send it back and we'll fix it. And then you can keep it almost forever."

Malfroot drew an…

Latvian composer Eriks Ešenvalds has been making quite a name for himself in choral music. He teeters gingerly between consonance and dissonance, and varies intimate whisperings, the strength of forces—sometimes a solo soprano over the chorus; sometimes a…

Description: Tubed class-AB push-pull monoblock power amplifier. Tube complement: One EF86 (6267), one ECC82 (12AU7, 6189), two KT170 (or 6550, KT88, KT90, KT120, KT150) per block. Inputs: One pair single-ended (RCA). Outputs: Gold-plated L/R binding posts, 5 ohm and 8 ohm taps. Frequency response: 10Hz–50kHz, –3dB. Output power: 60W into 8 ohms with KT150 or KT170 tubes (17.8dBW); 50W into 8 ohms with KT88 tubes (17dBW), THD 10%. Input impedance: 100k ohms. Output impedance: 8 ohms, 4 ohms. Voltage gain: Approx. 27dB (KT150 or KT170, 8 ohm load). Bias adjustment…

Analog sources: J.Sikora Standard Max Supreme turntable with KV9 tonearm and Aidas Tru-Stone Gold Web MC cartridge.
Preamplifiers: Rogue Audio RP7, (line), Manley Chinook (phono).
Power amplifier: Air Tight ATM-1 Special Edition.
Loudspeakers: DeVore Fidelity Super Nine, Voxativ Ampeggio, Volti Audio Lucera.
Cables: Interconnects: Triode Wire Labs Spirit II (RCA). Speaker: Argent Pur, Auditorium 23 (10'). Power: Furutech G-314Ag Plus.
Accessories: Pro-Ject VC-S2 ALU, HumminGuru record cleaning machines; AOCISKA soft bristle brush;…

Further inquiry
Would it have been possible to incorporate the functions of the NET and FLOW into the Nazaré rather than putting them in separate boxes? "It wouldn't work as well," Vitorino said. "Unless you want to have three power cables in the same box, you will always have some ground contamination. This is why two mono power amplifiers are better than a single stereo amp with dual mono configuration."

Similarly, the reason the Nazaré does not have a separate outboard power supply has to do with impedance. Once you separate the…

Although both the NazaréNET and NazaréFLOW, which I will refer to as the NET and FLOW, were designed to pair with the flagship Innuos Nazaré music streamer-server ($61,000), which I have already reviewed, they can work with any music streamer-server and DAC with a USB audio input. Given their prices, I expect they will only be used with top-line…

This article is a primer on jitter in digital audio. We will look at what jitter is,…

The AudioQuest DragonFly Copper USB-connected DAC/headphone amplifier ($250)—the sixth generation of the popular device—is the most energy-efficient version yet. It also uses the fewest parts on its tiny circuit board.

In an acknowledgment to the cellphone-centric world of headphone listening, it ships with the DragonTail USB-A female-to-USB-C male adapter, which plugs into modern cellphones, tablets, and compact computers. The Copper itself plugs directly into USB-A sockets on computers, and it requires no Windows (or Apple, or Linux) driver.

"Like all…

Digital sources: dCS Varèse five-piece music system, Innuos Nazaré music streamer-server, PhoenixNET; Small Green Computer Sonore opticalModule Deluxe with Sonore Audiophile Linear Power Supply; ATGBICS AFCT-5710PZ-C single-mode fiber optic modules (2); ASUS ROG Rapture GT-BE98 Pro and Netgear Nighthawk modem with Nordost QSource linear power supply; ASUS AX6000 and RT-AX88U Pro satellite mesh routers; Synology 5-bay 1019+ NAS with Ferrum Hypsos linear/switching hybrid power supply; Apple 2023 iPad Pro and 2025 MacBook Air.
Preamplifiers: Audio Research…