Introduction:

1: The MK4 adopts a combined design. The front end uses the familiar op amp amplification, and then promotes the rear dual differential circuit, which is classic and mature.

Selected components: M42 small signal amplifier tube from Mingguan series, Sanken medium power C4883A1859 drives the output of high-power tube

2: power tubes:  TTA1943 / TTC5200 

3: With horn protection circuit.

Parameters:

Output power: 200W+200W 8 Ω

Input interface: single end input

Output impedance: 4-8 Ω

Input impedance: 50K

Signal to noise ratio: 110DB

Frequency response: 20Hz-30kHz

Harmonic distortion: (THD) ≤ 0.01% (1kHz)

Power supply:

Main voltage: DC double 30-63V (with power supply rectifier filter board)

Pre stage: AC double 12 - 16V for power supply

Protection circuit: AC single 12-15V.