Reference Max Bundle (Reference + Protocol Max)

The Reference Max Bundle is a complete high-fidelity system built to unlock the full potential of your music; where precision tuning meets uncompromising power. Designed to work in perfect synergy, this pairing delivers a clean, authoritative signal chain that elevates every detail, from the deepest bass textures to the finest treble nuances.

At the core is the CrinEar Reference, engineered for true reference-grade sound with a neutral, measurement-driven tuning that reveals your music exactly as it is. Its advanced 2DD + 3BA hybrid driver system, featuring the Horizontally-Opposed Dual Woofer System (HODWS), produces tight, controlled bass, natural midrange clarity, and extended, resolving highs, creating a sound that is both precise and immersive.

Driving it is the CrinEar Protocol Max, a powerful portable DAC/amp that brings out the Reference’s full capabilities with greater resolution, dynamics, and control, alongside the ultimate flexibility of a 10-band parametric EQ. The result is a listening experience that feels effortless yet revealing, whether you’re in the studio or on the move. Together, they form a seamless, high-performance setup designed for those who demand clarity, accuracy, and impact in every note.

What You Get

• CrinEar Reference IEM (2DD + 3BA)
• Detachable 2-pin silver-plated copper cable
• Interchangeable 3.5mm single ended and 4.4 balanced connectors for universal compatibility
• 3 pairs of "standard bore" silicone tips, 3 pairs of "shorter bore" silicone tips, and 4 pairs of shortwide silicone tips in variety of sizes (XS/S/M/L) + 1 pair of M-sized foam tips
• Premium leatherette zip case
• CrinEar Protocol Max
• USB C-to-C cable
• USB C-to-A adapter

Specs (Reference)

• Driver configuration: 2DD (HODWS) + 3BA
• Impedance: 16Ω @1kHz
• Sensitivity: 104dB/mW @1kHz
• Frequency Response Range: 2Hz ~ 44,000Hz
• Nozzle Width: 6.0mm (lip)
• Cable Material: Silver-plated Copper
  

Specs (Protocol Max)

• DAC Chip: Dual Cirrus Logic CS43198
  
• Amp Chip: Dual SG Micro SGM8262-2
  
• Maximum Power Output (BAL):
  - @ 8Ω: 31.3 mW (Eco), 442 mW (Boost)
  - @ 16Ω: 62.5 mW (Eco), 600 mW (Boost)
  - @ 32Ω: 31.3 mW (Eco), 500 mW (Boost)
  - @ 300Ω: 3.5 mW (Eco), 54 mW (Boost)
  
• Maximum Power Output (SE):
  - @ 8Ω: 31.3 mW (Eco), 500 mW (Boost)
  - @ 16Ω: 15.63 mW (Eco), 250 mW (Boost)
  - @ 32Ω: 7.8 mW (Eco), 125 mW (Boost)
  - @ 300Ω: 0.8 mW (Eco), 13.5 mW (Boost)
  
• SNR @1kHz 0dBFS: 132 dB (BAL), 127 dB (SE)
  
• THD+N @1kHz 0dBFS: -118 dB (BAL), -116 dB (SE) 
  
• Crosstalk @1kHz -6dBFS: -116 dB (BAL), -65 dB (SE)
  
• Output Impedance: <0.6Ω (BAL), <0.3Ω (SE)