Усилитель Astell&Kern AK 380 amp (original) к плееру Astell&Kern AK380/AK320 + оригинальный кожаный чехол для усилителя с плеером, б/у, есть небольшие внешние нюансы, по работе без проблем, встроенный аккумулятор 3400 mAh. Разумный торг, возможен обмен на внутриканальные проводные наушники.
Expansion-type amplifier with design unity.
3,400 mAh large-capacity battery.
High-gain output is four times greater than low-gain output and supports high-impedance headphones.
* Amp powered on : Yes
* Earphones / headphones disconnected : Yes
* GAIN Changed : Yes
3,400 mAh Large-capacity Battery

Specification
General Specifications:
Model PAF11 / AK380 AMP
Body Color Meteoric Titan, Black
Body Material Aluminum
Output Level [Low Gain] Unbalanced 2.1 VRMS / Balanced 2.1 VRMS (Condition: No Load)
[High Gain] Unbalanced 4.1 VRMS / Balanced 8.1 VRMS (Condition: No Load)
Input Type-B micro-USB Input (Charging & data transfer (PC & Mac))
/ Connection Mode: MTP (Media Device)
Outputs PHONES (3.5mm) / Balanced Out (2.5mm, only 4-pole supported)
Dimensions 3.17 ”(80.7 mm) [W] x 5.01 ”(128.4 mm) [H] x 0.40 ”(10.3 mm) [D]
Weight 10.30 oz (292 g)
Audio Performance:
Frequency Response [Low Gain]
±0.06 dB (Condition: 20 Hz – 20 kHz) Unbalanced / ±0.06 dB (Condition: 20 Hz – 20 kHz) Balanced
[High Gain]
±0.03 dB (Condition: 20 Hz – 20 kHz) Unbalanced / ±0.03 dB (Condition: 20 Hz – 20 kHz) Balanced
Signal to Noise Ratio [Low Gain] 110 dB @ 1 kHz, Unbalanced / 110 dB @ 1 kHz, Balanced
[High Gain] 113 dB @ 1 kHz, Unbalanced / 114 dB @ 1 kHz, Balanced
Crosstalk [Low Gain] 108 dB @ 1 kHz, Unbalanced / 130 dB @ 1 kHz, Balanced
[High Gain] 108 dB @ 1 kHz, Unbalanced / 128 dB @ 1 kHz, Balanced.