• SoundStage! Shorts - McIntosh Laboratory MA252 Integrated Amplifier (November 2017)
  • SoundStage! InSight - Hegel H90 and H190 Integrated Amplifiers (October 2017)
  • SoundStage! Shorts - How Hegel's SoundEngine Works (October 2017)
  • SoundStage! InSight  - Estelon History and YB and Extreme Loudspeakers (September 2017)
  • SoundStage! Shorts - What Makes Hegel Different? (August 2017)
  • SoundStage! Shorts - Estelon Extreme Legacy Edition Loudspeaker (July 2017)
  • SoundStage! InSight - Amphion Overview and Technologies (July 2017)
  • SoundStage! Insight - Totem Acoustic Signature One Loudspeaker (June 2017)
  • SoundStage! Encore - The Cowboy Junkies'
  • SoundStage! Shorts -- Anthem's STR Integrated Amplifier (May 2017)
  • SoundStage! Shorts -- Paradigm's Perforated Phase Alignment (PPA) Lenses (March 2017)
  • SoundStage! InSight -- Paradigm's Persona 9H Loudspeaker (March 2017)
  • SoundStage! InSight -- Contrasts: Dynaudio's Contour and Focus XD Speaker Lines (February 2017)
  • SoundStage! Shorts - New Technologies in MartinLogan's Masterpiece Series
  • SoundStage! Shorts - Dynaudio/Volkswagen Car Audio (December 2016)
  • SoundStage! InSight - Gryphon Philosophy and the Kodo and Mojo S Speakers (January 2017)
  • SoundStage! Shorts -- What's a Tonmeister? (November 2016)
  • SoundStage! InSight - AxiomAir N3 Wireless Speaker System (December 2016)
  • SoundStage! InSight - Bang & Olufsen BeoLab 90 (November 2016)
  • SoundStage! Shorts - Gryphon Diablo 120 Integrated Amplifier (October 2016)
  • SoundStage! InSight - Dynaudio History and Driver Technology (October 2016)
  • SoundStage! Shorts - The Story How Gryphon Began (September 2016)
  • SoundStage! InSight - Devialet History, ADH Technology, and Expert 1000 Pro (September 2016)
  • SoundStage! Shorts - Devialet's Phantom Loudspeakers (August 2016)
  • SoundStage! InSight - McIntosh Home Theater and Streaming Audio (July 2016)
  • SoundStage! Shorts - McIntosh MC275 Stereo Amplifier (June 2016)
  • SoundStage! InSight - McIntosh History and Autoformer Technology (June 2016)
  • SoundStage! InSight - NAD Viso HP50 Headphones (May 2016)
  • SoundStage! Shorts - GoldenEar Technology's Anechoic Chamber (May 2016)
  • SoundStage! Shorts - PSB's M4U 4 Earphones (April 2016)
  • SoundStage! InSight - GoldenEar Technology's Triton Two+ and Three+ Loudspeakers (March 2016)
  • SoundStage! Shorts -- KEF's LS50 (February 2016)
  • SoundStage! InSight -- Monitor Audio's Platinum II Series (January 2016)
  • SoundStage! Shorts -- Pryma 0|1 Headphones (December 2015)
  • SoundStage! InSight -- KEF's Blade Two Loudspeaker (November 2015)
  • SoundStage! InSight -- KEF and the Uni-Q (October 2015)
  • SoundStage! InSight -- Monitor Audio Acoustics & Aesthetics (August 2015)
  • SoundStage! InSight -- PSB's Imagine T3 Loudspeaker (June 2015)
  • SoundStage! InSight -- Hegel's H160 Integrated Amplifier-DAC (April 2015)
  • SoundStage! InSight -- MartinLogan's Neolith Loudspeaker (February 2015)

To Hans Wetzel,

I have recently been gifted a pair of MartinLogan Aeons. Since I live north of Reno, Nevada, I find myself in an audio desert. Best Buy's Magnolia shop has nothing special. At the other extreme is a Pass Labs dealer. So, I'm sure by now you know what the question is: 50Wpc Arcam A19 with, as you stated, top-to-bottom refinement, or the 100Wpc Rogue Audio Sphinx, with more power and a midrange that excels? I could go on. Will you ponder the thought and advise me?

Stefano

One heck of a gift, Stefano. The one noteworthy thing about the Aeons, like most electrostatic loudspeakers, is that they're pretty challenging to drive. They have a stated 4-ohm nominal impedance, but drop to a cringeworthy 1.32 ohms at 20kHz. That is downright brutal on any amp. While neither amp is perfectly suited to tackling such a load, I think at reasonable volumes either will get the job done. A doubling of power, which is what the Rogue gives you, only provides you with 3dB more volume. On the other hand, the Sphinx has a slightly more robust power supply, but is also 40 percent more expensive at $1395 (including optional remote) versus the A19's $999 asking price. So pros and cons with both.

If you have the funds, I would spring for the Sphinx -- the extra power and larger power supply are practical improvements, while its exciting midrange should complement the Aeons' lightning-quick electrostatic panels. Honestly, though, you can't go wrong either way. . . . Hans Wetzel