Just Audio uHA-120 Headphone Amplifier Anodised Silver (uHA120) [HH00041]

Just Audio uHA-120 REV B -  Description

Just Audio uHA-120 Portable Headphone Amplifier. Discover pocket sized amplification with uncoloured and natural sound. The Just Audio uHA-120 uses an internal more discrete configuration usually only found in larger desktop headphone amplifiers, to enable better alignment with the Just Audio's philosophy of delivering a natural, precise and uncoloured listening experience.

This version is the new Revision B model which allows you to configure the unit to a higher gain setting for full size or hard to drive headphones or a lower gain setting for in-ear or easily driven headphones.

Everything right down to the chosen components and the final PCB layout has been optimised for attaining the best possible audio quality. The standard fitted volume control potentiometer of the uHA-120 is of pro-audio quality which can be upgraded to a Vishay studio grade volume control pot.

With a light-weight and durable design the uHA-120 with internal rechargeable battery is a high-quality portable amplifier that features everything you need to enjoy your music on the go.

Just Audio uHA-120 REV B - Features

• High quality pocket sized headphone amplification
• Uncoloured natural sound
• Internal Lithium-polymer battery or USB power
• Lightweight and durable design for easy portability
• Solid ground plane PCB layer for ultimate noise immunity
• 3.5mm stereo jack input and 3.5mm stereo jack headphone output
• Volume control with integrated rotary power switch
• Selectable internal battery or USB power source
• Selectable battery charge rate (normal or fast)
• Optimised discrete output buffer implementation

Technical Specifications

• 60 mWrms/channel into 32 ohm @ nominal (3.6V) battery voltage
• 10 mWrms/channel into 300 ohm load @ nominal battery voltage
• 16 mWrms/channel into 300 ohm load @ fully charged (4.2V) battery voltage
• 28 mWrms/channel into 300 ohm load with 5.2V USB power supply
• Distortion (THD): <0.005% @ 1KHz (-20dBu to 5dBu output level, with both channels driven with 32 Ohm headphones)
• Dynamic range (dBA): >100dB
• Bandwidth (-1dB): 12Hz-40kHz
• Output impedance: < 1ohm
• Output current limit: +/-80mA per channel
• Maximum Gain:(REV B): 10dB/6dB (Jumper selectable)
  
• Battery recharge time (max): 2.5 hour fast charge; 6 hour normal charge
• Dimensions (approx): height: 23mm, width: 52mm, length: 85mm
• Weight: 125g +/-1g

Package Includes

• Just Audio uHA-120 Headphone Amplifier with Soft Silver Anodised Finish
• Mini USB cable (0.6m)
• Gain setting Tool Kit
  
• Four self-adhesive stick-on feet