Denon PMA-250 specifications

Category : Integrated amplifier

Brand : Denon

General

Connections

Technical data

Special equipment

Electronics

Wiring diagram can be found in the network under 'denon pma 250 service manual pdf'.

Listening test at Wharfedale Diamond 220 on May 22, 2021 Klaushuhn

Other equipment Bluesound Note 150

I have selected my music pieces under Al Di Meola, AC DC and Pat Metheny. A mix that should reveal tonal strengths and weaknesses.

With CD direct switching and without loudness, it quickly shows what the "little one" can do.

Excel lent neutrality. What is most surprising is what he delivers for an excellent spatial representation. Wide and deep. Never intrusive, yet present.

Then it is still necessary to look at the excellent large-sized speaker terminals. For the inclusion of banana plugs. Well ahead of his class and time.

An absolute purchase recommendation for loudspeakers with medium to high efficiency.

Manufacturer: c279c1ef3fe7ca1956b057d2e95af71b
Model: PMA-250
Years of Manufacture: 1987
Made in: Japan
Color: Black, Silver,Copper
Type: Analog
Remote Control: No
Power Consumption: 80 W
Dimensions: 435 x 85 x 250 mm (WxHxD)
Weight: 4.7 kg
Original price approx.: 349-399,- DM
Model variants:
- E2 Europe
- EK UK
- EI Asia
- EU USA
- EC Canada
- EA Australia

E2 Europe
EK UK
EI Asia
EU USA
EC Canada
EA Australia

Number of inputs:
- Phono (2.5mV 47kOhm ) (RIAA MM)
- CD/CD-Direct (150mV 47kOhm )
- Tuner (150mV 47kohm)
- Aux (150mV 47kohm)
- Tape IN (150mV 47kohm)
Number of outputs:
- 1 Speaker pair 4..16 Ohm
- Headphones 6.3mm Jack
- Tape Record-Out

Phono (2.5mV 47kOhm ) (RIAA MM)

CD/CD-Direct (150mV 47kOhm )

Tuner (150mV 47kOhm )

< li>Aux (150mV 47kOhm )

Tape IN (150mV 47kOhm )

1 Pair of speakers 4..16 Ohm
Headphones 6.3mm Jack
Tape Record-Out

Continuous Power
- 8 Ohm : 2x 25 W (1kHz THD 1%)
- 4 Ohm : 2x 40 W (1kHz THD 1%)
Dynamic Power
- 8 Ohm : n.a.
- 4 Ohm : n.a.
Total Harmonic Distortion: 0.05% (-3dB rated output, 8 ohm)
Attenuation factor: n.a.
Frequency response: 10 .. 40,000 Hz
signal-to-noise ratio: 72 dB, 96 dB
stereo channel separation: n / a
sound-control:
- Bass: 100 Hz ± 10 dB
- treble: 10 kHz ± 10 dB
- Loudness: no
- High Filter : no
- Low Filter (Subsonic): no
- Mute: no
- Direct/Line-Straight: no

8 Ohm : 2x 25 W (1kHz, THD 1%)
4 Ohm : 2x 40 W (1kHz, THD 1%)

8 Ohm : k. A.
4 Ohm : n / a

Bass: 100 Hz ± 10 dB
treble: 10 kHz ± 10 dB
Loudness: no
High Filter : no
Low Filter (Subsonic): no
Mute: no
Direct/Line-Straight: no

Balance control on double-running Volume Knob on an axis
red LED indicates the switched-on device status
switch for Tape Monitor Tape playback is not on the Source selector switch
switch for CD Direct, provided, bypasses only the Source switch and the Tape Monitor switch, by principle, but the tone control,
headphones due to the main speaker switches off when plugging in; except model U. K.
model varianeten USA, Canada and Asia have cracking, additional power connectors
Speaker when it is turned Off, regardless of the Volume position

amplifier
- discrete push-pull output stage with bipolar transistor pair 2SC3853/2SA1489 (possible European replacement types: TIP3055/TIP2955, TIP140/TIP145 (Darlington))
- protection of the power amplifiers for each channel by F4,0A fuse on the main Board
- adaptation of the quiescent current setting rudimentary possible, exact adaptation requires Disassembly to PCB-solder side
- driver block uPC1225H
- Phono stage with OP M521BP
- tone control in the Feedback path between the output of the power amplifier and the input driver stage
- headphone is through a series resistor at the amplifier
power supply:
- 2x 27VAC rated voltage (center tap) ; 2x 32VAC idle
- 1x bridge rectifier (MB2U)
- 2x 8200uF screening to ±36VDC -> supply amplifier
- 2x linear longitudinal control to ±16.5 VDC -> supply Phono stage
- securing the power page by T1,0A fuse inside the Unit

discrete push-pull output stage with bipolar transistor pair 2SC3853/2SA1489 (possible European replacement types: TIP3055/TIP2955, TIP140/TIP145 (Darlington))
protection of the power amplifiers for each channel by F4,0A fuse on the main Board
adaptation of the quiescent current setting rudimentary possible exact matching requires Disassembly to PCB-solder side
driver block uPC1225H
Phono stage with OP M521BP
tone control in the Feedback path between the output of the power amplifier and the input driver stage
headphone is through a series resistor at the amplifier