The Marantz PM-300
is a stereo amplifier that is FTC rated for 4 ohms at 37 watts per channel, 20
Hz to 20 kHz, at no more than 0,08% Total Harmonic Distortion. At the usual
speaker impedance of 8 ohms the rated FTC output power was 30 watts per
channel. Overall, this is a nice, moderate cost unit suitable for smaller
installations. The output power meters, though having essentially a flat
frequency response, had acceptably accurate readings only when the output power
was 6 watts 8 ohms, or higher. The meters are calibrated from 0 to 60 watts
into 8 ohms and from 0 to 120 watts into 4 ohms. Its equalization of 50 Hz;
1,000 Hz and 10,000 Hz. There is also a 20 Hz low filter. Another convenience
feature is the single switched and unswitched AC outlets. In our specifications
we show the power output measured into an 8 Ω load to be 3 watts more than the
manufactures claimed rating. Marantz emphasises the 4 Ω rating because they say
speaker impedances are usually 5-6 ohms, not 8 ohms.
Power Output Rating
per Channel:
37 W at 4 Ω RMS
33 W at 8 Ω RMS
Total Harmonic
Distortion (at RMS 8 Ω): 0,025%
Intermodulation
Distortion: 0,03%
Damping Factor: 60 (8 Ω , 1 kHz)
Frequency
Response: 15 Hz - 50 kHz
Signal-to-Noise
Ratio:
Phono : 87 dB
Line : 98 db
Input Sensitivity/
Impedance:
Phono : 2,8 mV/47 k Ω
Line : 150 mV/ 25 k Ω
Controls:
Bass : +12/-15 dB at 50 Hz
Mid : +5,5/-6 dB at 10 kHz
High : +10/-9 dB at 10 kHz
Low Filter
Attenuation: 3 dB at 20 Hz
Dimensions (W x H x
D): 416 x 146 x 243 mm
Weight (net): 6,2 kg
