1. Headphone insertion hole.

2.TR pattern.

3.UT pattern.

4. Volume adjustment.

5. Signal selection.

6. Red/green two-color high voltage delay indicator.

7.Signal input.

8.Right channel circuit insurance tube.

9.Left channel circuit insurance tube.

10.Power input socket port and insurance tube.

Electrical performance index:

Name/Model: MS-77T

Volume: 325mm: 430mm*210mm (L*W*D)

Gross weight: about 24kg

Net weight: about 21kg

Use Vacuum tube: 7027BX4 6J1X8

Output power: 40W+40W (8Ω)
Load impedance: 4Ω-8Ω

Maximum power consumption: ≤250W

Signal to noise ratio: ≥88dB (A weighting)

Distortion: ≤0.5% (1KHz)

Frequency response: 5Hz~68KHz

Input sensitivity: ≤0.23V (1KHz)