What about the treble region? Here, as you might expect, there are some plusses and minuses. The excellent transparency and power of the M1200 allow it to soar wide open in this fussy sonic region. The grip and control on violin and piano or vocals is most impressive. Take the German counter-tenor Andreas Scholl. On a Harmonia Mundi recording of Bach cantatas, it is impossible to detect a hint of compression with the M1200 when Scholl cuts loose. You can also practically hear the air whooshing through the organ pipes on contemplative treble passages. The automotive equivalent would be flooring it on the Autobahn with no sense of hesitation. The power with the M1200, in other words, is always there, always on tap, always ready to deliver.
But—you knew there was a “but” coming—the M1200 is simply not on the level of costlier amplifiers in offering an unimpeachable treble region when it comes to tonality. In my view, the M1200 closes the gap between switching and Class A/B amplifiers to a remarkable degree—but not all the way. It has great clarity, but simply remains a little tonally thinner on top than other top-flight amplifiers.
The M1200 poses a real challenge for much of the audio industry. It offers a colossal sound and excellent refinement at what has to be considered a budget price for the high end. PS Audio, which has specialized in power regeneration for many years, is really expanding its ambit. For anyone who has a loudspeaker that is difficult to drive the M1200 is a must-audition. It does so many things so well that it is consistently a joy to listen to in my system.
Of the amplifiers that I’ve auditioned in this price range, the Stellar M1200 is by far the best, a gangbuster piece of gear that upends many old verities about switching amplification. I could live with it for a very long time. Stellar, indeed.
Specs & Pricing
Frequency response:10Hz–20kHz ±0.5dB, 10Hz–45kHz +0.1dB, -3.0dB
Output power: 600W into 8 ohms, 1200W into 4 ohms.
Signal to noise: > 112dB, [email protected] watts
Output impedance: <0.007 ohms, 50Hz, 2.8Vrms
Damping factor: >550 at 50Hz, 2.8Vrms, 4 ohms; >1100, 8 ohms
Inputs: RCA (unbalanced), XLR (balanced)
Outputs: Copper-base nickel-plated binding posts (two pair)
Dimensions: 17″ x 3.75″ x 12″
Weight: 27 lbs. (each)
By Jacob Heilbrunn
The trumpet has influenced my approach to high-end audio. Like not a few audiophiles, I want it all—coherence, definition, transparency, dynamics, and fine detail.More articles from this editor