GRA 10


Golden Ratio (GR) design follows the classical proportion for aesthetics and includes internal baffles to minimize standing waves.


Speakers incorporate a custom co-axial driver from acclaimed Radian Audio, custom crossover and components selected for optimal performance.


The cabinets have twin rear ports to deliver an open and transparent sound easily driven by low power tube amps. 


  • Type: rear ported, golden ratio, single driver 

  • Cabinet: Canadian MDF construction

  • Finish: stained, varnished wood veneer

  • Driver: 10 in co-axial

    • 1.75 in high freq dome with wave guide

  • Internal wiring: Nordost

  • Frequency response: 40Hz to 20kHz

    • +/- 3dB

  • Sensitivity: 94 dB

  • Impedance: 8 Ohm

  • Input Power: 3-225 Watts RMS

  • Dimensions: 14.5Wx9Dx23.5H in

  • Weight: 28 pounds each

LEVEL 1 & 2 Upgrade Options

  • ​Tweeter diaphragm - Beryllium

  • Crossover Capacitor - Mundorf SUP=EVO / SGO

SIGNATURE Upgrade Options

  • Crossover Capacitor - ACS Cera / JUP-BW / MU-SGO 

  • Internal cabling - AC Switzerland Silver/Cryo/Cotton


The standard Aluminum diaphragm and Mundorf capacitor can be upgraded to an exotic Beryllium diaphragm and ultra high end Mundorf EVO Silver-Gold-Oil capacitor.  Matching stands are also available.


  • ​Tweeter diaphragm - Aluminum

  • Crossover Capacitor - Mundorf MCAP Supreme

  • Internal cabling - Nordost 4-Flat FEP/OFC