This is a thread for discussing about the new Flux Lab headphone amplifier, the M-Field.
The M-Field is a brand new headphone amplifier by Flux Lab Acoustics. Although it has been developed in parallel with the Mentor, it has its own distinctive sonic characteristics. M-field is part of the same family as the Mentor and has a similar option for synchronizing two units.
The model uses MOSFET transistors in the output stage and has a unique sound signature and tuning. The sound is characterized by a darker tone and a thicker, fuller sound in the low frequency range. The sound has a smoothness, a certain intimacy that is characteristic of MOSFET-based devices, with an impressive volume of soundstage.
Main features :
- High-power class-A MOSFET output stage
- J-FET input stage
- Supply voltage 70 Volts
- Individual power supply for each channel
- 64-step relay volume attenuator
- Premium components: Nichicon, Wima, Takman, CDE, PRP etc.
The price is $1299 for a single unit with the mono input included and $2599 for a dual mono stack.
Important note
The M-Field is not just a stripped down version of the Mentor. This is a whole new amplifier with a different tuning and sound signature. This is made to be a high-end, solid state alternative to a tube amplifier.
The circuit inside might look simpler but it is not. The M-Field features the same high quality parts as the Mentor. The toroidal transformer is only one but it is bigger, with a very complex design and is more expensive to manufacture than the transformer of the Mentor. Additionally the power supply is of the same quality as the Mentor.



The M-Field is a brand new headphone amplifier by Flux Lab Acoustics. Although it has been developed in parallel with the Mentor, it has its own distinctive sonic characteristics. M-field is part of the same family as the Mentor and has a similar option for synchronizing two units.
The model uses MOSFET transistors in the output stage and has a unique sound signature and tuning. The sound is characterized by a darker tone and a thicker, fuller sound in the low frequency range. The sound has a smoothness, a certain intimacy that is characteristic of MOSFET-based devices, with an impressive volume of soundstage.
Main features :
- High-power class-A MOSFET output stage
- J-FET input stage
- Supply voltage 70 Volts
- Individual power supply for each channel
- 64-step relay volume attenuator
- Premium components: Nichicon, Wima, Takman, CDE, PRP etc.
The price is $1299 for a single unit with the mono input included and $2599 for a dual mono stack.
Important note
The M-Field is not just a stripped down version of the Mentor. This is a whole new amplifier with a different tuning and sound signature. This is made to be a high-end, solid state alternative to a tube amplifier.
The circuit inside might look simpler but it is not. The M-Field features the same high quality parts as the Mentor. The toroidal transformer is only one but it is bigger, with a very complex design and is more expensive to manufacture than the transformer of the Mentor. Additionally the power supply is of the same quality as the Mentor.
Last edited: