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 has an extreme powerfull output and will drive even the most difficult headphones with ease. The analog input is sampled through a high-precise ADC chip (PCM1803A) and then resampled to the PCM1793 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 best appropriate frequency of sound. By adopting the special digital volume control chip PGA2311, this does not only reduce the distortion of sound but also make the lowest differences of synchronous gain of right and left channels.
Specifications:
Amplifier Structure : High current / swing output amplifier, four step bias control
Power structure analog: High precision linear voltage regulator (Analog system)
Power structure digital: High efficiency / frequency voltage regulator (Digital system)
Power Mode : Stand by and Power on mode, provided with main power switch to shut down
Input Select : Line in / Coaxial / Optical / AES-EBU / USB
Headphone impedance : 16ohm to 600ohm
Circuit Protect : Output short / system over current protect
Characteristic : Using OP275 and high current power transistor to build high quality headphone amplifier
Frequency Control : Adjustable from 44.1kHz to 192kHz (upsampling also for USB)
Bit Length Control : Adjustable 16-bit or 24-bit data length
Mute Control : Provided directly mute headphone without rotate the volume knob
USB Support Format : 16-bit, 32 / 44.1kHz / 48kHz
SPDIF / AES-EBU Support Format : 24-bit, 96kHz (MAX)
Power Amp : TI - TAS5706
Processing Chip : TI – TAS5086
ADC Chip : TI – PCM1803A
USB Chip : TI – PCM2704
SRC Chip : TI – SRC4193
Receiver : TI - DIR9001
Housing dimensions : 208 x 220 x 55 mm (D x W x H). Housing only.
Weight : 2104 gram
Connectivity:
Can be used with any equipment with Line-out or Pre-out function
Intel® Pentium® 2, Celeron® 800MHz or higher computer system
Microsoft® Windows 2000® (Service Pack 4) or Windows® XP (Service Pack 1)
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