But if you wish to finesse the quality endeavor of classic separates-based hi-fi systems, you cannot do without them. Fundamentally, it is not…
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The most obvious and easily quantified lumped-parameter electrical properties of cables are inductance, resistance, and capacitance—L, R, and C. Can variations of these parameters subtly alter the system sound? Yes, they can. Manufacturers rarely tell us what these values are, probably because it would undermine the frequently obscure technical claims made for their products. For a loudspeaker cable, the "complex" electrical load, which includes the loudspeaker, is connected back to the amplifier output port (and in many cases, in addition, to the inverting input via the…
Analog sources: Linn Sondek LP12 turntable with Keel chassis, Karousel main bearing, Radikal motor control, Naim ARO tonearm, and Lyra Delos cartridge.
Digital sources: Naim UnitiCore network server and S/PDIF source; Roon Nucleus +; Naim ND555 Streamer-DAC with dual 555PS(DR) power supplies.
Phono preamplifier: Naim SuperLine-SuperCap DR.
Preamplifier: Townshend Allegri Reference.
Power amplifier: Naim NAP 250 (2023/4 series).
Loudspeakers: BBC LS3/5a 15 ohm (Marshall), FinkTeam KIM, Wilson Audio Specialties The WATT/Puppy.
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The first event takes place in San Diego on Wednesday, May 28, at Stereo Unlimited (3191 Sports Arena Blvd., San Diego, CA). The evening runs from 5:00 to 9:00 PM, featuring a detailed presentation at 5:30 PM, followed by a Q&A session and listening…
Now read that again but with all verbs in the past tense. That’s right: it’s auf Wiedersehen to the Bavarian capital, because starting in mid-May of 2026, the show will be held annually in Vienna's more modern ACV (Austria Center Vienna), 220 miles due east. Whether the sleek new…
My first opportunity for an in-home audition came in 2021, when I reviewed the 866 stereo integrated amplifier ($17,500 with DAC, $16,000 without). But that entry-level (by…
And the sound
My initial impressions were uniformly positive. More than positive. Boulder's 1151 monoblocks sounded really beautiful. I began by sampling unfamiliar recordings for possible review. Electric Fields (24/48 WAV, Download/Alpha), from Barbara Hannigan, the Labèque Sisters, and David Chalmin, struck me as a bit too Hildegard von Bingen meets new age immersive, but it was compelling and intriguing enough to warrant a review. As I continued to listen, the warm, glowing bath of sound from the 1151s kept drawing me in.
One of the first things I wrote in my notes was "I…
Description: Mono class-A power amplifier with "Smart Current" biasing. Analog inputs: 3-pin XLR. Digital inputs: USB (for software updates). Loudspeaker outputs: two stereo pair 0.025" (6mm) binding posts for biwired loudspeakers. Maximum input voltage: 1.14V for maximum rated output at full rated power. Power output: 250W continuous into 8 ohms (24dBW), 350W peak power into 8 ohms, 600W peak power into 4 ohms, 750W peak power into 2 ohms. THD, 8 or 4 ohms, 250W: 0.002%, 20kHz: 0.01% THD, 2 ohms 250W: 0.0003%, 20kHz: 0.02%. Equivalent input noise, 20kHz: 2.2µV.…
Digital sources: dCS Varèse five-piece music system, Vivaldi Apex three-piece music system, Rossini CD/SACD transport, EMM Labs DV2i DAC, Meitner MA3 Integrated DAC; Innuos Statement Next-Gen Music Server and PhoenixNET network switch; Small Green Computer Sonore opticalModule Deluxe (2); Broadcom/ Avago AFBR-5718PZ 1GB SX-SFP, Gen 5 fiberoptic modules (2); Nordost QNet switch and QSource linear power supply (2); Sonore Audiophile Linear Power Supply; Synology 5-bay 1019+ NAS with Ferrum Hypsos linear/switching hybrid power supply; Linksys MR9000 mesh…