RAAL Requisite

SR1a Earfield Monitors

  • Unparalleled accuracy and realism in a soundfield devoid of room acoustics
  • Reveal more detail and accuracy than pro studios
  • Sonic experience akin to uber level stereo systems
  • Hand made using carbon firbe, steel, aluminium
  • Pro Audio heritage
  • 5 year local warranty


Even compared to headphones already well regarded for their ability to render micro-details, such as Focal’s Utopia, the STAX SR-009S, or the LB-Acoustics MySphere, the SR1a is clearly superior.

Ian Dunmore (@Torq) on Headphones.com

It's a headphone that in my experience outdoes 99% of what I have heard across any headphones in the 20 years that I’ve collected headphones.

The Tech Collector on HeadAmp.com


The SR1a by RAAL-requisite is the world’s first Earfield headphone monitor. Experience mixing, mastering, and home listening with unparalleled accuracy and realism in a soundfield devoid of room acoustics and comb-filtering caused by work surface reflections. Earfield™ technology delivers unheard of program accuracy and a speaker-like soundfield experience.

The SR1a is also, the world’s first True-Ribbon headphone. Highly specialized ribbon drivers were developed that reproduce 30Hz to 30kHz bandwidth in order to eliminate the need for sealed chambered bass and allow for open-air baffles (both front and back) for a true full-frequency soundfield.

Professional engineers report that SR1a Earfield Monitors reveal more detail and accuracy than even their finest traditional studio monitors or headphones. Helping to achieve high-quality, transferable mix results in non-traditional environments. The accuracy, musicality and portability of the SR1a frees the engineer to work whenever, and wherever they choose.


  • SR1a Earfield Monitors
  • 7' headphone cable
  • Hardcase
  • 5 year warranty


  • delivered <5 business days from purchase
  • free shipping


Headphone Design Earfield™ open baffle. Floating near ear, does not enclose ears.
Impedance 0.2 Ohms with cabling. Used in series Ribbon/Amplifier Interface.
Amplifier Interface Ribbon/Amplifier Interface. 6 Ohms. Use any loudspeaker amplifier.
Amplifier power rating 100W
Sensitivity 91dB/1W
Max SPL 111 dB
Frequency Range 30Hz – 30kHz
Weight 425 grams