Stellar M700 Mono

Overview & Features

The problems faced when crafting a new power amplifier are many—delivering sufficient power, control, frequency extension, and dynamics while maintaining a perfectly layered soundstage under the most complex musical passages.

All amplifiers sound different. What determines sound quality are the components and topologies of the amp’s input voltage stage and output current stage. Each section should complement the other. Between them, the amp develops its sound.

Stellar’s design imperatives—affordable pricing, uncompromised sonics—were major challenges solved by the invention of a unique new circuit christened the Analog Cell. 

Stellar engineer Darren Myers had planned from the outset to take advantage of Class D’s high current, low distortion, ruler flat linearity for the output stage—knowing full well it is the input stage that determines sonic character. This critical interface between preamplifier and power amplifier is where Stellar’s magic would be unveiled; where Myers could lavish upon the music the sweet, tube-like quality of Class A biased MOSFETs. His challenge was to synergistically marry both input and output topologies, for which he invented Stellar’s Analog Cell.

The Analog Cell is the heart of the M700’s musicality, where richly overlayed layers of music’s inner details are preserved even in the most complex orchestral crescendos. The Analog Cell is a proprietary, fully differential, zero feedback, discrete, Class A MOSFET circuit, hand-tuned to capture the smallest micro dynamics without sacrificing the loudest macro dynamics music has to offer.

Technical Specification

Unit Weight

13 lbs [5.9 kg]


Unit Dimensions

17” x 3” x 12” Chassis only. 13" deep including connectors.


Shipping Weight

16.5 lbs [7.5 kg]


Shipping Dimensions

22”x 8” x 17”


Color Options




Mains Power Inputs



Accessories Included

UK (BS 1363) (230V version)


Audio Inputs

RCA (Unbalanced)

XLR (Balanced)


Speaker Outputs

Copper base nickel plated binding posts (2 pair)



DC Trigger Input

3.5mm 5-15VDC



3 years parts and labor


Signal Gain

30.5dB +/-0.5dB


Sensitivity for rated output power




1kHz@300 Watts <-100dB


Input impedance

Unbalanced 50KΩ

Balanced 100KΩ


Output Impedance

50Hz, 2.8VRMS<0.007Ω


Damping factor

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%


Output Power

120vac mains, 1kHz, 1% THD

8Ω:  350W minimum

4Ω:  700W minimum

2Ω:  Stable for musical transients

PS Audio Stellar M700 Mono

Power Amplifier

Midland HiFi Studio - Key Information


These are real power houses without the usual hernia inducing physical weight constraints.  A mere 13lbs, easy to move about.  350 watts into 8 ohms with a sophisticated smothness while still being neutral and true to source.


If you have ever wished for great power without the mass these mono blocks are the answer.