The Stellar M700 mono amplifiers are a massively powerful engine capable of effortlessly driving demanding loudspeaker loads to concert levels. Stellar’s best. A pair of these placed on any loudspeaker brings forth the lush, rich and soul-satisfying power of two completely independent power blocks with headroom to spare. One listen to a hugely loud and complex musical passage effortlessly rendered by the M700 pair and you’ll know you made the right choice.
Rated at 350 Watts into 8Ω and 700 Watts into 4Ω, the M700 combines the best of two worlds: ultra linear, high-current, Class D technology for the output stage; a discrete, Class A MOSFET based Analog Cell for the all-important input stage. The M700’s rich, warm, and engaging sonic character comes from the Analog Cell. Its powerful, authoritative control over the loudspeaker stems from its high current, ultra-low impedance Class D output stage.
Stellar’s design imperative was to produce a truly musical sounding power amplifier that proudly competed with any amplifier under $5,000. Its designer, PS Audio engineer Darren Myers, took the challenge and set to work on a new concept—a hybrid that would combine the best of today’s technology with time-honored techniques leveraging PS Audio’s forty plus years of experience.
The results are extraordinarily musical. Even from the earliest prototype we knew the Stellar power amplifier series was going to be something special. Stellar amplifiers never draw attention to themselves, a rare quality in amplifiers of any price. After hundreds of hours of tuning, voicing, and perfectionist tweaking, we were confident the ends justified the means.
Audition the Stellar M700 pair and you’ll appreciate Myer’s dedication to musical truth without compromise.
The Analog Cell makes all the difference
The connection between preamplifier and power amplifier is critical, for it is at this junction where most essential musical details are easily lost. Nothing in the design of a power amplifier is more important than its input stage when preserving music’s finest nuances. In the M700 a unique topology called the Analog Cell has been employed to preserve the rich details found in music.
The Analog Cell is a zero feedback, balanced, Class A, MOSFET input stage. The design closely mirrors the sonic characteristics of a vacuum tube and allows Myer the freedom to voice the amplifier as he sees fit. Long hours of listening and tuning sessions in Music Room One, shared by PS Audio founder Paul McGowan and Darren Myer, resulted in a sonic signature that honors the music and never draws attention to itself.
The listening experience with the M700 starts feet tapping and smiles breaking out. The M700 presents music without a hint of glare. Listeners are constantly surprised at the width and depth of the M700’s soundstage; its preservation of the smallest details in reverb, room acoustics, musical overtones; its commanding presence without intrusion; it’s delicate handling of subtle shadings; its authority as it grabs hold of the loudspeaker and breezes through even the most complex musical passages.
RCA (Unbalanced); XLR (Balanced)
Speaker Outputs S300
Copper base nickel plated binding posts (2 pair per channel)
Speaker Outputs M700
Copper base nickel plated binding posts (2 pair)
Sensitivity for rated output power
1kHz@300 Watts <-100dB
Input impedance S300
Unbalanced 50KΩ; Balanced 100KΩ
Input impedance M700
Unbalanced 50KΩ; Balanced 100KΩ
50Hz, 2.8VRMS <0.007Ω
50Hz. 2.8VRMS; 8Ω >1100; 4Ω >550
Frequency Response @ 2.8VRMS
10Hz – 20KHz +/- 0.5dB; 10Hz – 50KHz +0.1/-3.0dB
1KHz, 1W/4Ω - <0.02%; 10-20KHz, 1W/4Ω - <0.02%; 10-50KHz, 1W/4Ω - < 0.05% (90kHz BW); 1KHz, 37.5W/4Ω - < 0.01%
S300 Stereo Amplifier Output Power (Both channels driven 120vac mains, 1kHz, 1% THD)
8Ω 140W minimum; 4Ω 300W minimum; 2Ω Stable for musical transients
M700 Mono Amplifier Output Power (120vac mains, 1kHz, 1% THD)
8Ω 350W minimum; 4Ω 700W minimum; 2Ω Stable for musical transients