The M³, also called M3, M^3, M cubed, or MMM is a high-end Stereo Class A Headphone Amplifier with active ground designed by AMB Laboratories. (more about it here)
For my versions of the M^3, I have created a high quality, compact and sturdy custom made enclosure made of wood (available in Mahogany or Walnut) and aluminum which houses the M³ and its Power Supply (Sigma 11 set at 24V).
Optionally available with DC offset protection and delay muting circuit (Epsilon12) to prevent any turn-on and turn-off noise and protect your headphones.
Also available in Special Edition enclosure with a large 42x232mm opening in the aluminum top plate for improved ventilation above the Mosfets output heatsinks in order to set up a higher output bias current up to 120mA without overheating issues.
M³ headphone amplifier with variable gain in custom mahogany case – mfspdesigns
AMB’s M³ Headphone amplifier with Sigma 11 PSU and Epsilon 12 protection circuit – mfspdesigns
3mm brushed aluminum front panel with Mahogany case and rubber feet – M3 headphone amplifier – mfspdesigns
Sturdy aluminum support for Volume and Gain ALPS RK27 “blue velvet” potentiuometers – M3 headphone amplifier – mfspdesigns
Stainless steel latching power switch – M3 headphone amplifier – mfspdesigns
IEC 230V power terminal with fuse (can be configured for 115V) – M3 headphone amplifier – mfspdesigns
Gold plated RCA inputs – MMM headphone amplifier – mfspdesigns
M³ headphone amplifier with custom wood and aluminum case – mfspdesigns
M^3 headphone amplifier – mfspdesigns
This class A amplifier provides a high current MOSFET output stage which is particularly suited to drive low impedance headphones.
Stereo Class A Headphone Amplifier with active ground (3ch)
Sigma 11 – 24V power supply unit – (more about AMB Sigma 11 here)
Can be configured for 230 V or 115V
Toroidal transformer 24VAC, 1.04A, 25VA
Option: Epsilon 12 – DC offset protection and delay muting circuit – (more about AMB Epsilon 12 here)
Enclosure: wood and aluminum with 3.6mm brushed aluminium front panel. (available in mahogany or walnut).
Massive aluminum knobs for Volume and Gain.
Stainless steel front power switch rated 3A, 250VAC.
Blue led for power indicator.
ALPS RK27 “blue velvet” high quality potentiometers for Volume and Gain control
Variable gain 2 to 17 – (upon request, it can be made with a fixed gain)
Output bias set to 85mA in standard version.
AD8610 opamps in the 3 channels (you can easily change for other opamps)
Neutrik 6,35mm jack
2 x Neutrik gold plated RCA for input
Output impedance: <0.05 Ohm
Max. Output voltage : about 13Vp-p (4.6Vrms)
Power output: 0.6Wrms into 33 Ohms ; 2Wrms into 8 Ohms
350x260x65 (incl. Knobs, RCA, feet)
350x235x55 (excl. Knobs, RCA, feet)
Weight: 2.6 kg
I use the M³ with my Sennheiser HD800 and a Marantz CD6004. The sound delivered by this amplifier is simply incredible: natural, very realistic, where every instrument is clearly separated, with a huge soundstage (on good recordings, you can pinpoint where each sound is coming from) and non-fatiguing for long listening sessions. If you enjoy headphone listening and if you are searching for an amplifier to drive your high-end headphones (in my opinion, it’s the perfect match for the HD800) and an affordable high quality headphone amp, the M3 is for you!!
You can see all the products currently in stock and the special offers by visiting this page.
Don’t hesitate to contact me for any information. Worldwide shipping.
Thanks for looking!
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