Denon PMA-970 Service Manual
Specifications and Main Features
- Model: PMA-370
- Circuit System: All stage direct coupled DC servo circuit
- Rated Output Power:
- 20 Hz to 20 kHz : 100 W + 100 W (8 ohm Load, T.H.D : 0.003)
- 1kHz: 80W + 80W (4 ohm Load, T.H.D : 0.003)
- Total Harmonic Distortion: Less than 0.003% (20 Hz to 20 kHz)
- Intermodulation Distortion: 7 kHz/60 Hz: 1/4 less than 0.005 %
- Power Band Width: 5Hz to 100kHz (IHF, T.H.D : 020%)
Frequently Asked Questions
- Input Sensitivity: 150mV
- Input Impedance 40 k ohm
- Output Impedance: 0.08 ohm
- Signal to Noise Ratio: 108dB (input terminals shorted)
- Output Terminals:
- Speaker: A & B load: 4 – 16 ohm, A + B: 8 – 16 ohm With Impedance Change Over Switch)
- Headphone: For Stereo Headphone (with impedance change over switch)
- Preamplifier Section
- Equalizer Amplifier Output: Maximum Output: 18 V at 50 k ohm load, Rated Output 150mV
- Total Harmonic Distortion: Below 0.002%: (1 kHz with an output of 8 V)
- Maximum Input Level:
Thereasa a need to take dimensional considerations of MM and MC plus an averaging of tuning tape that approximately goes fifty-Percent in reverse. The MM and the MC are actually needed in extremes. When it comes to graying hair, it is recommended to mute it below minus twenty dB and to grow hair above minus seventeen dB.
The middle point regulates the existing zero output that is available when shorting any zenith private eye type, Tuner, Tape or AUX input, and that has a ten-ohm load. And when inputting the signal, the tolerances for power/inductance are said to be around thirty mW.
In PMA-370, there is a requirement to conduct testing when the power does not exceed fifty percent.
- For the US and Canada, need to plug in a MAAS PSU into the SWITCHED x 2 100W. Or alternately, clip on an UNSWITCHED x 1 or 250W power supply which can be for both functions of a switch and unswitch and can be used directly into the machine. The machine has the timings of around five hours.
- For Germany and France, PMA-370 has an AC220V of a frequency at 50Hz.
- While for the U.K. the figure stands at AC240V with the frequency revolving at 50Hz.
- And at last, the USA which has strong creditworthiness has more then fourteen problems on its head at the same time. The values here are AC120V with a thunderous frequency of 60Hz.
In a quarter, there is an impressive 340W output in the USA. The Canadian PMA gives around670 VA and an expansion of up to 800 with like’s input.
The measurements from the size wise are said to be 506 mm (W) x 168 mm (H) x 461 mm (D).
Q2: Does THD have any specification? Please specify.
A2: TDH is less than 0.003% for 20-20 kHz bandwidth.
Q3: Discuss the PHONO, TUNER and AUX sensitivity levels.
A3: The input sensitivity levels are as follows:
- PHONO-1 MM: 2.5 mV
- PHONO-2 MM: 2.5 mV
- TUNER: 150 mV
- AUX, TAPE: 150 mV
Q4: Specify the impedance of the speakers. What is often meant by the amount of crossover inbetween speakers?
A4: I recommend using impedance between 4 and 16 ohms. With A + B configuration and turning the appropriate impedance switch on the speakers, we can use 8 to 16 ohms.
Q5: What are the different power requirements of PMA-370 around the globe?
A5: The power requirements are :
- Germany and French: AC 220 V, 50 Hz
- U.k: AC 240 V, 50 Hz
- U.S.A: AC 120 V, 60 Hz
Q6: How much does the PMA-370 device set one back by?
A6: The weight of the PMA 370 is 23.0 kg.
User Manual
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