Kenwood - KA-5040R Solid state integrated amplifier

Magnificent Kenwood KA-5040R integrated amplifier with normal signs of use, is functioning at 100% but if I could fine-tune it I think it would be even better

with 95W+95W per channel at 8 ohms
140W+140W per channel at 4 ohms
190W+190W per channel at 2 ohms
brutal power with a damping factor of 220

Dimensions: 440 x 147 x 403 mm

Weight: 11.6 kg

Year: 1993

Color - Black
Connections

Number of inputs: 7
CD at 200 mV / 47 kΩ

Phono
I. MM @ 2.5 mV / 47 kΩ
II. MC @ 0.2 mV / 100 Ω
Tuner at 200 mV / 47 kΩ
AUX @ 200 mV / 47 kΩ
a Tape/DAT 1 at 200 mV / 47 kΩ
a Tape/DAT 2 at 200 mV / 47 kΩ

IN Adapter @ 200 mV / 47 kΩ
Number of outputs: 2
Tape recording at 200 mV / 1 kΩ
Adapter output @ 200 mV / 0.2 kΩ

Specifications

Output power (distortion):
Stereo:
95 W + 95 W (1 kHz at 8 Ω)
140 W + 140 W (1 kHz at 4 Ω)

Dynamic power (distortion):
Stereo:
105 W (8 Ω)
175 W (4 Ω)
210 W (2 Ω)
Total harmonic distortion: 0.03% (20 Hz - 20 kHz, 80 W, 8 Ω)
Damping factor: 220 (50 Hz)
Frequency response: 5 Hz - 100 kHz, +0 dB, -3 dB (CD)
Signal-to-noise ratio: 102 dB
Tone control:
Bass: yes
+/- 10 dB at 100 Hz
Treble: yes
+/- 10 dB at 10 kHz
Noise level: yes
+6 dB at 100 Hz, +3 dB at 10 kHz at -30 dB level
Subsonic: yes
18 Hz, -12 dB/Octave
Mute: yes
Pure Direct/Flat Line: yes (Direct Source)