The Integrated Amplifier which can switch a pure Class-A and AB class.
In addition to pure Class-A 15 W/ch, the change of AB class 60 W/ch is attained. And in order to raise the quality of AB class even to the level of a pure Class-A, the high speed high fT transistor which took high high region cut-off frequency with 90MHz is adopted as the power stage. Switching distortion which is a fault of AB class is banished to a limit.
Marantz PM-4 Esotec Series, Integrated Amplifier
Class: A-B Sine Power:
Class A: 15 W + 15 W (8Ω),
Class A-B: 60 W + 60 W (8Ω)
THD: 0,015% (20Hz - 20kHz at the time of an 8Ω load intensity and an Output power)
Cross modulation distortion (60Hz:7kHz=4:1): 0.015% (at the time of an 8Ω load intensity and an Output power)
Dumping factor (an 8Ω load intensity, 1kHz): 70
Transmission range: 5 - 100,000 Hz +0 -2 dB
Frequency response: 20 - 20,000 Hz -0, 3 dB
Distortion: 0.015%
Tone control:
Bass: ±10dB (100Hz)
Treble: ±10dB (10kHz)
Input sensitivity/impedance:
Phono 1, 2 MM: 2.5 mV/47 kΩ
Phono 2 MC: 2 00 mV/100Ω
AUX, tuners, tape 1, 2: 150 mV 25 kΩ
RIAA phono: 20 - 20,000 Hz, ±0.25 dB
Signal-to-Noise ratio:
Phono MM: 84 dB
Phono MC: 64 dB
AUX, tuners, tape: 104 dB
Phono max. Input: 330mV (MM); 25 mV (MC) at 1kHz
Inputs: 2 x phono, switchable phono 1: MM + MC, Phono 2: MM, 2 x tape
Outputs: 2 x speaker, headphones
Voltage: 110/120/220 V AC, 60/60 Hz
Power consumption: 150 watts
Dimensions (W x H x D): 416 x 117 x 334 mm
Weight: 9.5 kg
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