OPA-3A technical parameters

Output power:
External speaker output: 8W+8W (4-8Ω)

Balanced headphone output: 4500MW+4500MW (32Ω)

Single-ended headphone output: 1000MW+1000MW (32Ω)

Frequency response: 20Hz ~ 50kHz (-1.5dB)

Harmonic distortion: 0.5% (1kHz)

Signal to noise ratio: 89dB

Input sensitivity: 220mV

Input impedance: 100kΩ

Left and right output balance: <0.5dB

Tubes: 2AU7 x2, 300B x2, 5U4G x1

Machine volume (WxDxH):  360mm x275 mm x170 mm

Net weight: 20kg
Working conditions: Temperature: 0 ° C ~ 40 ° C Humidity: 20% ~ 80%

Storage conditions: Temperature: -20 ° C ~ 70 ° C Humidity: 20% ~ 90%