FiiO AM2a Medium Power Amplifier Module for X7

FiiO

Headphone Amplifier Module Medium-power Type-AM2A

AM2A is the official MOD (modified) version based on the popular non-official MOD version of AM1. It utilises the combo AD8620 + AD8397ARDZ as its operational amplification. The voltage supply of AM2A is the same as that of AM2, that's why we name it as AM2A.

AM2A is well compatible with popular music, and it presents neutral but a little bit smooth sound signature. It is textured in high-mid frequency, clear and analytical in resolution and rich in low frequency. So it's overall well-controlled in sound quality. (*Subjective listening experience is for reference only, not as judgment criteria)

Output Power > 420 mW (32 Ohms / 1 kHz)
Frequency Response 8 Hz to approximately 92 kHz (-3dB)
Signal to Noise ≥ 118 dB (A-weighted) 
Output Impedance < 0.3 Ohms (32 Ohms load) 
Channel Separation > 73 dB (32 Ohms / 1 kHz) 
THD+N < 0.002% (32 Ohms / 1 kHz) 
Max Output Voltage > 10.6 V p-p 
Max Output Current > 250 mA (for reference)
Play Time 7.5 hours