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Listening to the A 21+ was eminently delightful and satisfying from the first note. I began by listening to a number of new piano recordings: Because the instrument has such a wide tonal range, and although it radiates sound directly from the strings and soundboard as well as from its entire body, it must be presented to the listener, live or via recording, as a unitary voice. I began with Francesco Piemontesi's marvelous "Orage" (Storm) from Book 1 ("Suisse") of Franz Liszt's Années de Pèlerinage (Orfeo ORF-C944182I, CD). From the top notes with their direct ping to the bottom tones that…
Sidebar 1: Specifications
Description: Solid-state, class-AB stereo power amplifier. Inputs: 1 pair single-ended (RCA), 1 pair balanced (XLR). Outputs: 1 pair single-ended (RCA) loop for multiamping; 1 pair five-way binding posts. Power output: 300Wpc into 8 ohms (24.8dBW), 500Wpc into 4 ohms (24dBW), 1000Wpc into 8 ohms (bridged) (30dBW). Frequency response: 20Hz–20kHz, +0/–0.25dB; 5Hz–100kHz, +0/–3dB. Voltage gain: 29dB, 8 ohms (unbalanced input). Input sensitivity: 1V per leg balanced, 1V unbalanced. Damping factor: >l1100 @ 20Hz. THD: <0.1% @ full output. IM distortion:…
Sidebar 2: Associated Equipment
Digital sources: Oppo Digital UDP-105 universal disc player, Baetis Audio Prodigy-X PC-based music server running JRiver Media Center v25 and Roon, exaSound e38 Mark II D/A processor. QNAP TVS-873 NAS.
Preamplifiers: Audio Research MP1, Parasound P7.
Power amplifiers: Benchmark AHB2, Hegel C53, Classé Sigma Mono, Parasound Halo A 31.
Loudspeakers: Revel Ultima Studio2, Revel Performa3 F206, Vivid Kaya 45.
Cables: Digital: AudioQuest Coffee (USB). Interconnect: AudioQuest Earth/DBS balanced, Kubala-Sosna Anticipation (RCA). Speaker: Benchmark…
Sidebar 3: Measurements
I tested the Parasound Halo A 21+ with my Audio Precision SYS2722 system (see the January 2008 "As We See It"). I preconditioned the amplifier by operating it at one-third the specified power into 8 ohms for an hour. (With a class-AB output stage, one-third power results in the maximum dissipation in the output devices.) At the end of this time, the side-mounted heatsinks were very hot, at 162.8°F (72.7°C). The top panel was also hot, at 116°F (46.7.1°C).
The Parasound's voltage gain into 8 ohms measured 29.2dB from the balanced inputs, 29.4dB from the…
On Friday, February 28, 3–7pm, Audio Advisors, at 2271A Palm Beach Lakes Blvd., West Palm Beach, Florida, will present the new Wilson Audio Chronosonic XVX loudspeaker. Wilson's Peter McGrath will be there. Space is limited so please R.S.V.P. to Rudi, either by email rkothe@audioadvisors.com or phone, at (561) 478-3100.
The Sonus Faber Olympica Nova 1 ($6500/pair) is the company's latest stand-mounted, two-way monitor—a lineage that began with their first speaker, the Minima, which I reviewed some 24 years ago. Like the products that followed, the Minima featured a 1" silk-dome tweeter and a 4" reflex-loaded paper-based midbass driver, both attached to a leather-covered baffle and housed in a beautiful wood cabinet, hand-crafted in Italy. I enjoyed the Minima's sound, as did this magazine's Sam Tellig, who praised its "sweet, forgiving, slightly rolled-off on top, and somewhat ripe . . . mid-to-upper bass,"…
The speakers and stands were placed in the locations I had used for the KEFs when I reviewed the SVS SB-3000 subwoofer for the September 2019 issue. This put the Olympica Nova 1s' woofer centers 68" from my listening position and 60" apart. They were 60" from the front wall and 45" from the sidewalls, and toed in toward my listening room chair. However, this configuration left a weakened central image and resulted in a frequency response that rolled off above 2 kHz. Moving the speakers closer together so that they were 50" apart gave the flattest measured treble response and strengthened the…
Sidebar 1: Specifications
Description: Two-way, reflex-loaded, stand-mount loudspeaker. Drive-units: 1.1" (28mm) damped-apex silk-dome tweeter, 5.5" (150mm) sandwich-cone mid/bass driver. Crossover frequency: 2.5kHz. Frequency response: 50Hz–30kHz, ±3dB on-axis. Sensitivity: 87dB/2.83V/m. Nominal impedance: 4 ohms. Recommended amplification: 40–150W. Long-term maximum program power: 60W.
Dimensions: 14" (354mm) H × 8.7" (222mm) W × 14.5" (368mm) D. Weight: 20lb (9.5kg) each. Shipping weight: 58lb/pair (26.4kg). Dedicated stands: 29.85" (758mm) H × 12.25" (300mm) W × 15.35" (390mm) D…
Sidebar 2: Associated Equipment
Analog sources: Linn Sondek LP12 turntable with Lingo power supply & Ittok tonearm, Spectral MC cartridge; Day-Sequerra 25-year Anniversary FM Reference FM tuner.
Digital sources: Bryston BCD-1 CD player, BDP-3 media player, BDA-3 DAC; Oppo Digital BDP-103 universal BD player; Roon Nucleus+ with Core V1.4 (build 300) stable (64 bit).
Preamplification: Bryston TP-2 30 step-up transformer; Bryston BP-173.
Power amplifiers: Mark Levinson No.534, ML2 monoblocks.
Loudspeakers: KEF LS50.
Cables: Digital: Bryston 75 ohm BNC to RCA;…
Sidebar 3: In My Room
I measured the Nova Olympica 1's in-room frequency response with a digital track of uncorrelated pink noise and Studio Six Digital's Fast Fourier Transform (FFT) module in their Audiotool's smartphone app. I set this module to 1/6 octave, 1-second delay, flat frequency response plot, full frequency range (20Hz–16kHz), no peak tracking, averaging mode, and log frequency scale. I started by averaging five room responses across a 2' horizontal window at the level of my ears sitting in my listening chair. Averaged across this broad window, the Nova Olympic 1's frequency…