Denon DRA-625 Service Manual
Specifications and Main Features
- Types: DRA-625, DRA-425
- Continuous Power Output:
- DRA-625: 65 watts per channel minimum RMS (8 ohms 20 Hz to 20 KHz with THD not more than 0.05%)
- DRA-425: 50 watts per channel minimum RMS (8 ohms 20 Hz to 20 KHz with THD not more than 0.05%)
- Power Bandwidth (IHF):
- DRA-625: 5Hz - 40KHz
- DRA-425: 5Hz - 40KHz
- Total Harmonic Distortion (20 Hz – 20 kHz):
- DRA-625: 0.009% at 8 ohms
- DRA-425: 0.01% at 8 ohms
- Frequency Response:
- PHONO RIAA Standard Curve: 20Hz – 20KHz +0.5dB
- TAPE-1-2, CD, AUX/VIDEO: 20Hz – 50KHz +1.5dB
- Input Sensitivity and Impedance:
- PHONO MM: 2.5mV / 47 k ohms
- TAPE-1-2, CD, AUX/VIDEO: 150mV / 29 k ohms
- Maximum Input Level (1 kHz):
- PHONO MM: 110mV
- PHONO MM: 86dB
- Signal to Noise Ratio (IHF-A):
- PHONO MM: 94 dB
- TAPE-1-2, CD, AUX/VIDEO: 98dB
- Tone Control:
- BASS: +8dB @ 100Hz
- TREBLE: +8 dB @ 10 KHz
- Loudness Control: With the Variable Loudness feature, users have control over 10 positions and can adjust the frequency anywhere from 50 Hz to 10 kHz. Here, the volume can be set between +10 dB and +5 dB.
- Tuner Section:
- Range of FM tuners: 87.7 to 108 megahertz.
- Usable Sensitivity of the receiver: has a value of 0.9 nV.
- In term of 50 dB quieting sensitivity the Lna has a value of 1.6 µV > range of 15.3 dB.
- A signal to noise ratio of 78 dB Tests have shown that the figures for STEREO receivers all met the set
- The total harmonic distortion of DRA 625 was 0.1125. For DRA 425, the value is said to be 0.15 at the most.
- Range of AM Receivers: Receivers normally fluctuate between 522 kHz- 1611 KHz.
- General Specifications:
- Electric Power Ratio: Usual rating is 220-240 voltage and 50 hertz.
- Power Consumption: 170 Watts is the maximum rating and 140 W is the least.
- Rational Switched Power: This stands at 100 W as a per-rated value.
- When it comes to Unswitched Power, this normally after 250 W >Consumption.cylinder motors.
- Size in millimetres: 434 in width and 350 diameter and the provided height is 140 .
- Weight includes: DRA 625 AT and DRA 425 AT is 7.4 and 7.3 kgs each.
- Remote Control Unit:
- Model: Remote model RC 104.
- 3 v d c is the rated supply for the device. This can be achieved using two size r03 batteries.
- Size in External Dimensions: The dimension in width is 60 while that is 165 in the height while a depth of 16
- The provided weight is inclusive of batteries i.e. 80 g.
Frequently Asked Questions
- Q: What is the maximum output power of the DRA-625?
A: DRA 625 has an output of 75 per channel with a load of an impedance of 6 ohm at frequency of One K.
- Q: Can I connect 4-ohm speakers to DRA-425?
A: DRA-425 is considered as an 8 ohm rated receiver but can be used with 4 ohm speakers if required, however the performance might not be very satisfactory.
- Q: What do I do to the tone controls?
A: The tone controls for bass and treble can be adjusted through the front panels knobs. Bass can be increased to +8 dB at 100 Hz and treble can be increased to +8 dB at 10 kHz.
- Q: Is there a remote for DRA-625?
A: There is a remote control unit which is called RC-104 and is provided with DRA-625 and DRA-425 models.
- Q: What is the range for the sensitivity of a phono input?
A: The phono mm input’s sensitivity is rated at 2.5 mV and its loading impedance is at 47 k ohms.
- Q: In case there is a disturbance in the reception, what should I do?
A: It is advisable to utilize a grounding wire as this interference is observed. Attach a grounded thick insulated wire to the "GND" terminal and connect the bare end to any grounded metal object.
- Q: Are the other power sockets fitted into the rear panel?
A: The rear panel has one switched power socket rated at 100 W and one unswitched with 250 W rating.
User Manual
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