Libby

NOW ON STOCK for quick delivery !
The brand new "Libby" Pure class A Headphone Amplifier + USB/SPDIF DAC. The Libby is offering inputs for USB, S/PDIF Coaxial + Optical, but also AES/EBU for connection to professional equipment.
Of course a line-in is available at the back.

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.

Take a closer look ! (click to view)

Technical Specification

	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 without parts 'sticking out' like switches, connector parts, etc.
	Weight : 2104 gram

Connectivity

	USB interface
	Digital Input: 1 x Coaxial, 1x Optical jack, 1 x AES/EBU (XLR)
	Line Input: 2 x RCA
	Line Output : 2 x RCA
	Headphone Output : 1 of 6.4mm Headphone jack (stereo)

System Requirements

	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)
	128MB RAM
	Available USB port