Editor's Note: SACD and DVD-A player ratings are based on how they sound with their respective hi-rez media, not CD.
A+
Antipodes DX Reference music server: $6500–$7500
See JA's review in this issue.
Bryston BDP-2: $2995
Essentially a beefed-up BDP-1 (reviewed by LG in Vol.34 No.6), the BDP-2 replaces the original's 0.5GHz processor with a 1.6GHz Intel Atom N450 and upgrades its single-amp linear power supply with a larger toroidal transformer specced to provide 10 amps of peak current.…
Editor's Note: The sound of any particular CD transport/digital processor combination will be dependent on the datalink used-see "Bits is Bits?" by Christopher Dunn and Malcolm Omar Hawksford, Stereophile, March 1996, Vol. 19 No.3 (WWW). Unless mentioned, processors are limited to 32/44.1/48kHz sample rates. To be included in Class A+, a digital processor must be capable of handling DSD or 24/96 LPCM data.
We strongly recommend those interested in using a computer as a true high-end digital audio source visit our sister website www.AudioStream.com, which is…
A
Bryston SP-3: $9895 ★
The SP-3 combines a true analog preamp and a full-featured multichannel digital audio processor in a beautifully built, relatively compact (17" W by 5.75" H by 14.25" D) case. It uses Bryston's high-quality 24-bit/192kHz DACs and offers a full suite of connections, including: eight HDMI inputs, two HDMI outputs, a 7.1 set of analog inputs and two 7.1 sets of outputs, four S/PDIF inputs, two AES/EBU inputs, and USB, RS-232, and Ethernet jacks. The sound from the SP-3's analog stereo…
Editor's Note: Apart from the CAT, Promitheus, Shindo, and Placette, all the Class A preamplifiers offer balanced inputs and outputs. And unless noted, the preamplifiers listed do not have phono stages.
A
Audio Research Reference 5SE: $13,000
The Ref 5 SE is a tubed, remote-controlled line preamp with six sets of balanced and unbalanced inputs, three sets of balanced and unbalanced outputs, and a unity-gain Processor input. It uses 6550C and 6H30P tubes for power-supply regulation, and four 6H30P dual-triodes in the analog stage. Improvements over…
Editor's Note: Because of the disparity between typical tube and solid-state "sounds," we have split Class A for separate power amplifiers into two subclasses. Nevertheless, even within each subclass, Class A amplifiers differ sufficiently in character that each will shine in an appropriate system. Careful auditioning with your own loudspeakers is therefore essential. Except where stated, output powers are not the specified powers but rather those we measured into an 8 ohm resistive load. All amplifiers are stereo models, except where designated.
A (…
A
Ayre Acoustics AX-5 Twenty: $12,950
In 2013, AD described the original Ayre AX-5—a $9950 integrated amplifier built around a recently rediscovered configuration of bipolar transistors known as the "diamond" circuit—as "one of the three best, most musical, most human-sounding solid-state amps I've ever heard." Then, in 2015, Ayre debuted a new version, the AX-5 Twenty—a nod to the company's 20th anniversary—promising even better sound. The AX-5 Twenty is built into the same foursquare aluminum case as the AX-5, and is controlled by the…
Editor's Note: Class A "Loudspeakers" are sufficiently idiosyncratic and differ enough from one another that prospective customers should read Stereophile's original reviews in their entirety for descriptions of the sounds. I have therefore just listed every system or combination that at least one of Stereophile's reviewers feels, as a result of his or her experience, approaches the current state of the art in loudspeaker design. (Note that, to be eligible for inclusion in Class A, the system must be full-range—ie, feature bass extension to 20Hz. It must also be…
A
B&W DB1: $4500
The DB1 is a powered subwoofer in a handsome sealed enclosure measuring 19.3" H by 18.1" W by 16.2" D and weighing 97 lbs. Its solid construction includes: two mechanically opposed 12" woofers separated by a partially open internal partition, 1"-thick walls of MDF with ¾"-thick bracing panels to minimize vibrations, digital signal-processing circuits to run its menu-based control system, home automation capability, and a 1000W switching amplifier equalized to produce linear output. Also included are a calibration microphone…
Editor's Note:
We strongly recommend those interested in headphone listening visit our sister website, www.InnerFidelity.com, which is edited by Tyll Hertsens.A
Audeze LCD-X: $1699
These large, luxurious, circumaural headphones have planar-magnetic drive-units with a thin-film diaphragm energized by arrays of powerful neodymium magnets on both sides. They employ Audeze-patented Fazor elements, said to guide and manage the flow of sound in the headphone. The circular drivers are housed in polished, black-anodized…
A
47 Laboratory Model 4730 Midnight Blue: $1500 $$$
From Japan's reliably unconventional 47 Laboratory comes the Model 4730 Midnight Blue stereo FM tuner, surely the only tuner in current production that allows the user to dial in stations with an actual dial. Its modest size (4.8" W by 3.75" H by 8" D) and attractive dark-blue casework set it apart, as does its use of an old-style rotary variable capacitor—made in a small batch to designer Junji Kimura's order—instead of a crappy digital receiver circuit. According to AD, "Decent-quality broadcasts sounded better…