Astell&Kern AK HC4

portable, headphone output: mini-Jack 3.5 mm, 30 – 20000 Hz

stationary, headphone output: 3 — 47 Ohm, Jack 6.35 mm, XLR, 20 – 20000 Hz

portable, headphone output: 47 Ohm, Jack 6.35 mm

stationary, headphone output: mini-Jack 3.5 mm, Jack 6.35 mm, 15 – 25000 Hz

portable, DAC: 384 kHz, 32 bit, headphone output: mini-Jack 3.5 mm, Pentaconn 4.4 mm, input USB C

stationary, headphone output: 8 – 600 Ohm, mini-Jack 3.5 mm, 20 – 20000 Hz, signal/noise 118 dB

portable, DAC: Asahi Kasei AK4490, 382 kHz, 32 bit, headphone output: 8 – 300 Ohm, Jack 6.35 mm, 500 мВт at 32 Ohm, 20 – 20000 Hz, signal/noise 112 dB

Bluetooth-amplifier, portable, DAC: ESS Sabre, 48 kHz, 16 bit, headphone output: 16 – 600 Ohm, micro-Jack 2.5 mm, mini-Jack 3.5 mm, 380 мВт at 32 Ohm, 45 мВт at 300 Ohm, 2 – 200000 Hz

stationary, headphone output: Jack 6.35 mm

stationary, headphone output: Jack 6.35 mm, XLR, 10 – 20000 Hz, signal/noise 120 dB

portable, DAC: CS43131, 384 kHz, 32 bit, headphone output: mini-Jack 3.5 mm, Pentaconn 4.4 mm, 20 – 50000 Hz, signal/noise 122 dB

portable, DAC: 384 kHz, 32 bit, headphone output: mini-Jack 3.5 mm, input USB C, 98 мВт at 32 Ohm, 20 – 40000 Hz, signal/noise 127 dB