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Firestone Audio Libby DAC Headphone Amplifier
Firestone Audio Libby DAC Headphone Amplifier
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Firestone Audio Libby DAC Headphone Amplifier
Item# 56240
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  • Provides exceptional performance for both Digital to Analog and Analog to Digital Conversion
  • Can be used with any equipment with Line-out or Pre-out function
  • Five selecetion frequency selector allows you to choose the best sound
  • Low jitter digital to analog conversion guarantees quality sound
  • Attractively engineered sturdy aluminum chassis

Essential Info

Details like low-jitter recovered DA conversion, selectable re-sampling frequencies, selectable headphone impedance ranges and digital volume control, are moving this headphone amplifier way above traditional analog systems. For a Class A amplifier, the Libby from Firestone Audio has an extremely powerfull output and will drive even the most difficult headphones with ease. The analog input is sampled through a precise Analog to Digital Conversion (ADC) chip and then resampled to the Digital to Analog Conversion (DAC) chip to serve as analog signal to output. Using the TI-DIR9001 receiver chip, which has the function of Low-Jitter Recovered System Clock, can isolate the original digital noise. In addition, Libby has 5 selections of resampling frequency from 44.1kHz to 192K, to choose the best appropriate frequency of sound. By using a special digital volume control chip, this does not only reduce the distortion of sound but also makes the lowest differences of synchronous gain of right and left channels.

What's Included

  • 1x - Libby DAC Headphone Amplifier
  • 1x - Power Cable
  • 1x - RCA Cable
  • 1x - USB Wire
  • 1x - Owner's Manual
  • 1x - Warranty Card

  • More Info

    A Digital to Analog Converter, also known as a DAC, is a device that converts a digital code to an analog signal. Most modern audio signals are stored in digital form (for example MP3s and CDs) and in order to be heard through speakers they must be converted into an analog signal. Most digital music players, such as a Smartphone or iPod, and PC sound cards come with internal DACs, although, they are very basic and do not deliver music in high resolution. Firestone Audio delivers a high quality DAC system with internal amplifier that allows you to play your music in high definition at the volume level that you desire. This system is the ideal peripheral for the music lover that stores their music library on their PC.

    An Analog to Digital Converter, also known as an ADC, is a device that converts the input continuous quantity to a digital number that represents the quantity's amplittude. Instead of doing a single conversion, an ADC often performs the conversions periodically. The result is a sequence of digital values that have converted a continuous-time and continuous-amplitude analog signal to a discrete-time and discrete-amplitude digital signal.


    ManufacturerFirestone Audio
    Manufacturer Product No.Libby
    Amplifier StructureHigh current / swing output amplifier, four step bias control
    Power Structure AnalogHigh precision linear voltage regulator (Analog system)
    Power Structure DigitalHigh efficiency / frequency voltage regulator (Digital system)
    Power ModeStand by and Power On modes, provided with main power switch to shut down
    Input SelectLine In / Coaxial / Optical / AES-EBU / USB
    Headphone Impedance16Ω to 600Ω
    Circuit ProtectOutput short / system over current protect
    CharacteristicUsing OP275 and high current power transistor to build high quality headphone amplifier
    Frequency ControlAdjustable from 44.1kHz to 192kHz (upsampling also for USB)
    Bit Length ControlAdjustable 16-bit or 24-bit data length
    USB Support Format16-bit, 32 / 44.1kHz / 48kHz
    SPDIF / AES-EBU Support Format24-bit, 96kHz (Max)
    Power AmpTI - TAS5706
    Processing ChipTI - TAS5086
    ADC ChipTI - PCM1803A
    USB ChipTI - PCM2704
    SRC ChipTI - SRC4193
    ReceiverTI - DIR9001
    Dimensions208mmD x 220mm W x 55mm H
    WeightApproximately 4.5 lbs
    USBType B
    Digital Input1 - Coaxial
    1 - Optical
    1 - AES/EBU (XLR)
    Line Input2 - RCA
    Line Output2 - RCA
    Headphone Output6.4mm Headphone Jack
    System Requirements
    SystemIntel Pentium 2, Celeron 800MHz or higher
    Operating SystemMicrosoft Windows 2000 (Service Pack 4) or Windows XP (Service Pack 1)
    RAMMinimum 128MB
    MiscellaneousCan be used with any equipment with Line-out of Pre-out function
    Important notes:
    Only merchandise credit for defective items returned within 30 days of purchase. No other returns allowed on this item.
    Manufacturer contact information: HDL Distributing, Tel: (888) 204-5768 Ext


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