Product Description

The HA-2 is an elegant yet sophisticated portable headphone amplifier with built-in rechargeable battery. It is engineered to enhance music playback from mobile phones and portable music players. Aesthetically, the HA-2 does not look like a typical or generic electronic device.

SPECIFICATIONS

Dimensions WxHxD: 2.7x5.375x0.5 inches, 68x137x12 mm

Weight: 6.2 oz, 175 grams

Frequency Response: 20 Hz - 200 kHz

Audio-in Level: 1 Vrms

Line-out Level: 1 Vrms

Headphone Impedance: 16 Ohm - 300 Ohm

Max Headphone Output Power: 300 mW into 16 Ohm, 220 mW into 32 Ohm, 30 mW into 300 Ohm

Headphone Amplifier Output Impedance: 0.5 Ohm

Output Jacks: 3.5 mm stereo headphone, 3.5 mm stereo line-out, Input Ports

Analog: 3.5 mm stereo audio-in

Digital: USB A for iPod / iPhone / iPad; USB micro-B for smartphones with USB OTG feature and computers.

DAC Chip: ESS Sabre32 Reference ES9018-K2M

Input Format: Stereo PCM, Stereo DSD (DoP v1.1 or native)

PCM Sampling Frequencies: 44.1 kHz-384 kHz, 16/24/32-bit

DSD Sampling Freq: 2.8224 MHz (DSD64), 5.6448 MHz (DSD128), 11.2896 MHz (DSD256, native mode only)

Profile: USB 2.0, USB Audio 2.0

Built-in Battery: 3000 mAh lithium polymer

Battery Operation Time: Approx. 13 hours for analog source via Audio-in; approx. 7 hours for digital sources via USB

Charging Time: Approx. 1 hour 30 minutes

INCLUDED ACCESSORIES

Power Supply Unit (Rapid Charging Charger)

USB A - USB micro-B data and rapid charging cable

USB A - Lightning data cable (for Apple devices)

USB micro-B to micro-B data cable (for Android and other smartphones)

3.5 mm - 3.5 mm stereo audio cable

Silicone rubber band (2 pieces)

User guide and warranty documents