Ha12 mobile phone decoding earphone product features: 

A. Ak4493 decoding, dual operational amplifier design, support PCM and DSD audio hard decoding ， Two customized hifi operational amplifier ICs with high power output, clear, bright and sweet sound

1，PCM ：16/24/32bit，44.1/48/88.2/96/176.4/192/352.8/384/705.6/768KHz 

2，DSD ：DSD64/128/256/DSD512 

3. Support modes of DSD Audio: DOP (dsd64 / 128 / 256), native (dsd64 / 128 / 256 / 512) 

B. Compatible with windows and MAC  OS、Android 

1. Android devices need to support OTG and UAC

2. The device needs to be connected with apple camera components 

C. Balanced and unbalanced double export design, various playing methods and high playability

1, 3.5mm unbalanced output

2, 2.5mm balanced output

Technical parameters related to balance and Unbalance: 

A. Operating voltage (VBUS): 4.7 ~ 5.3v 

B. Output level (0dB):

2Vrms  RL = 600 Ω, non-equilibrium;

4Vrms  RL = 600 ohms, balanced 

C. Flatness of frequency response (20Hz ~ 20kHz), unbalanced: + 0.05, - 0.3dB 

D. Noise level (without recording weight):

4.5uv, unbalanced;

8.1uv, balanced 

E. Signal to noise ratio (SNR): 117dba 

F. Total harmonic distortion + noise (THD + n):

-103dB  RL = 600 Ω, 0dB- 105dB  RL = 32 Ω, 100MW; Nonequilibrium 

-110dB  RL = 600 Ω, 0dB- 105dB  RL = 32 Ω, 100MW; balance 

G. Maximum output power:

100mW  RL = 32 Ω, non-equilibrium;

180mW  RL = 32 Ω, balanced;

50MW RL = 300 Ω, balanced