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Cypher Labs AlgoRhythm Duet Portable Headphone Amp


Cypher Labs

Moon Audio

Amps, DACs & Gear,Cypher Labs,Amps & Dacs,Headphones,Mobile,Earphones, Earbuds,IEM,Portable,New Markdowns,

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Cypher Labs AlgoRhythm Duet - A Fully Balanced Portable Headphone Amplifier.

The AlgoRhythm Duet achieves true desktop quality in a portable headphone amplifier.

This amp pairs perfectly with the AlgoRhythm Solo -R or AlgoRhythm -dB. The size, style and colors all match up so now you can have a complete Cypher Labs rig!

Michael Caplan of Elm City Music, says “The Duet has a deep and clean background. The sound is powerful, bassy, bold, authoritative and expansive – reference grade audio. My Ultrasone Pro’s never sounded so good!”

Regular Price: $599.00

Now only: $499.00

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  • The AlgoRhythm Duet features three gain settings, balanced input and output using a mini-4 pin connector and single ended 3.5mm input and output. Markings are laser etched on extruded aluminum for durability
  • Volume gain settings optimized for all headphone types
  • Single ended line-level analog output
  • Balanced mini-4 pin input and output (never translated from single ended)
  • Output optimized for all headphone types, including in-ear monitors and planar magnetic headphones
  • The AlgoRhythm Duet is 100% analog and so does not utilize a PC driver


Have Questions?

Find answers to common questions on our guides.



Additional Info

  •  Fully balanced high power analog headphone amplifier
  •  High capacity lithium-polymer battery – 10-14 hours play time – fast re-charge
  •  Matches in size and character with the AlgoRhythm Solo –R and AlgoRhythm Solo –dB for the ultimate portable rig
  •  Designed and assembled in the USA

Package Contents 

  • Cypher Labs AlgoRhythm Duet
  • User Guide
  • Mini to mini interconnect (1 meter)
  • Cypher Labs straps to bundle devices for travel
  • Switching 100v / 220v black micro USB AC charger, USA plug 



Frequency response in both balanced and unbalanced mode:
• 5Hz-150kHz ±1dB

Gain Settings:
• Low: -6dB
• Medium: +3.5dB
• High: +15dB

Balanced output power with both channels driven:
• 70mW into 32Ω
• 100mW into 50Ω
• 240mW into 300Ω
• 120mW into 600Ω

Unbalanced output power with both channels driven:
• 70mW into 32Ω
• 100mW into 50Ω
• 60mW into 300Ω
• 30mW into 600Ω

• < 1Ω

Power and Battery:
• Built in Rechargeable Lithium-18650 Battery
• Front Power on LED: Blue
• Back Charge Indicator LED: Charging-Green; Charged-Red
• Playtime: 10-14 hours
• Recharge Time: 3 hours with included micro USB wall power adapter


Limitations Review by Aware
Sound quality is excellent paired with Astell AK100 II. However, though marketed as a balanced amp those qualities can only be accessed through the RSA/ALO jacks for which no cords are supplied.

This radically changes the actual cost of the unit as sold, especially as the unit does not have TRRS jacks, either in 2.5 or 3.5mm. The switching power supply is noisy, common for the design. (Posted on 2/28/2015)

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