Theorem 720 DAC ®

Fully integrated headphone amplifier, Apple USB Audio transport; 24/192 USB DAC for computer and Android


Fully balanced headphone amplifier

Colors: Black or Copper

Large capacity battery charges Apple devices while playing up to 18 hours, even longer from computers

Multiple accessory cables for a wide variety of Apple and other devices


• High quality battery powered headphone amplifier
• Works with all modern Apple devices made after 2007 (note: the older iPod Classic 5.5 does not support USB Audio)
• Auto-source detect from computers, Android devices and Apple devices
• USB audio resolution up to 16/48 from Apple devices
• USB audio resolution on Mac (natively) or PC (with included driver) up to 24/192
• USB audio resolution on Android devices (using USB Audio Recorder Pro app) up to 24/192
• Larger capacity battery delivers long play time, up to 18 hours while charging Apple devices
• Fully balanced headphone output (4 pin)
• Single ended headphone output
• Single ended analog line-level output (2.1vrms)
• USB mini-A input allows input from computers (USB A to USB mini-B) or Apple devices (use our 30 pin to USB mini-a cable) • High capacity lithium-polymer battery – 8700mAh – isolated AC switching
• Three volume gain settings for all headphone types
• Free PC driver enables 24/192 playback on computers (no driver required for Mac)

Confirm with the manufacturer that your Android device supports USB audio.

  • Android Device List with USB Audio

  • Many Android devices will work with USB DAC’s when paired with:

  • USB Audio Player Pro

  • USB Audio Player Pro List of Compatible Devices

  • Specifications

    The headphone outs have as close to 0 ohm impedance as possible (less than 1ohm). The headphone output levels themselves depend upon the gain settings. With the volume pot set to 100%:

    High Gain
    • Single Ended output = 11.3 dB
    • Balanced Output = 5.5 dB

    Mid Gain
    • Single Ended Output = 3.5 dB
    • Balanced Output = -2.3 dB

    Low Gain
    • Single Ended Output = -9 dB
    • Balanced Output = -14.8 dB

    All outputs are the same for single ended and balanced:
    • 32 ohm = 205 mW
    • 50 ohm = 320 mW
    • 300 ohm = 68 mW
    • 600 ohm = 34 mW

    • < 1Ω

    Dimensions 120mm (136 incl volume knob) x 29mm x 64mm
    Weight: 10 oz / 0.3 kg

    See manual for more info and photos of how to assemble your rig

     Package Contents

    – Cypher Labs Theorem 720 DAC® & User Guide
    – 30 pin to USB mini-A sync cable with right angle connectors
    – 8 pin (Lightning) to USB mini-A cable
    – USB micro to USB mini-B cable (for Android)
    – USB A to USB mini-B cable (for computer)
    – Small USB female A to USB male mini-A adapter. Use with any standard 30 pin to USB A or Lightning to USB A sync cable
    – Cypher Labs straps to bundle devices for travel
    – Switching 100v / 220v gloss black AC charger with heavy duty red cord and right angle barrel plug
    – Embossed leather pad to protect devices when bundled

    Theorem 720 DAC® Product Manual



    We’ve uploaded the latest PC driver version 1.67 to our site.

    Please uninstall the older driver (either ver 1.60 or 1.61) and install the new version 1.67 to receive support for Windows 8. Both the old drivers and this new one support 24/192 files.

    If you have both an AlgoRhythm Solo -dB and Theorem 720 DAC, you may need to install the driver for each device, but the second install is only about 1 second. Be patient with the first install.


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