Dual CR 1780 specifications

Brand : Dual

General

Connections

Technical data

Amplifier

Tuner

Special equipment

The receiver is equipped with two Power supplies are very heavy and of high quality. Unfortunately, it does not have a backup battery for permanently storing the transmitters in the event of a power failure. However, it no longer comes from DUAL and was manufactured in Japan (OEM: Rotel ) for DUAL. Corresponding notes (Made under DUAL specifications in Japan) can also be found on the nameplate, on the back of the device. In terms of its internal structure, it is a typically solid Japanese device. His sound image can be called (subjectively) warm and harmonious. Quite a few DUAL fans prefer the sound of the amplifier / tuner combinations of the DUAL International series (e.g. CV1700 + CT1640, etc.). Also, the aluminum buttons and controls are of significantly better quality than is the case with the DUAL devices produced in Germany. This is particularly good for the noble appearance of the receiver, since the turned surfaces of the aluminum buttons - in contrast to the real DUAL devices, where they often come across weathered in old age - can be easily restored to their original appearance even after years of use, using the simplest means. All in all, this receiver is a very high-quality, rock-solid audio device, which is often traded among collectors of DUAL devices as an insider tip in terms of sound and processing.

manufacturer: Dual (OEM: Rotel )
model: CR 1780
year of construction: 1979 - 1981
Made in Japan
color: Metallic silver, Metallic brown
remote control: no
power consumption: 450 W (at nominal power)
dimensions: 440 x 150 x 405 mm (W x h x d)
weight: 14 kg
factory price approx.: 1.398,- DM

number of inputs:
- Phono (MM): 1.5 mV / 47 K-ohms
- AUX, Monitor, 2x Tape In: 150 mV / 470 ohms
- Main
number of outputs:
- 2x Tape Out, Monitor Out
- Pre-Out
- headphone (6.3 mm Jack, front)
- 2 pairs of Speakers

Phono (MM): 1.5 mV / 47 K-ohms
AUX, Monitor, 2x Tape: 150 mV / 470 ohms
Main

2x Tape Out, Monitor Out
Pre-Out
headphone (6.3 mm Jack, front)
2 pairs of Speakers

the duration of the performance (total harmonic distortion)
- 8 643961b8da111c0a15d770a1109a86d4: 2x 80 W
- 4 643961b8da111c0a15d770a1109a86d4:
dynamic performance
- 8 643961b8da111c0a15d770a1109a86d4: 2x 120 W
- 4 643961b8da111c0a15d770a1109a86d4:
total harmonic distortion: 0.04% in (2x 80 W, 1 kHz)
damping factor: > 20
frequency response:
- 10 - 60,000 Hz (DIN 45500 )
- 10 - 40,000 Hz (±1.5 dB)
signal-to-noise ratio: (DIN, rated power)
- Phono: > 62 dB
- high level: gt&; 80 dB
stereo channel separation:
sound-control:
- Bass: Yes, ±15 dB at 50 Hz
- height: yeah, ±15 dB at 15 kHz
Loudness: Yes
High Filter : Yes, -3dB at 8.5 kHz (12 dB/oct.)
Low Filter : Yes, -3dB at 70 Hz (12 dB/oct.)
Subsonic Filter : no
Mute: Yes
Direct/Line-Straight:

8 643961b8da111c0a15d770a1109a86d4: 2x 80 W
4 643961b8da111c0a15d770a1109a86d4:

8 643961b8da111c0a15d770a1109a86d4: 2x 120 W
4 643961b8da111c0a15d770a1109a86d4:

10 - 60,000 Hz (DIN 45500 )
10 - 40,000 Hz (±1.5 dB)

Phono: > 62 dB
high level: > 80 dB

Bass: Yes, ±15 dB at 50 Hz
height: yeah, ±15 dB at 15 kHz

receiving: FM, MW
frequency:
- FM: 87.5 - 104,05 MHz
- MW: 513 - 1,602 kHz
frequency response: 40 - 12,500 Hz
input sensitivity:
- FM: 0,6 µV (Mono) 18 µV (Stereo)
- MW: 15 µV
total harmonic distortion: 0,3% (Mono/Stereo)
signal-to-noise ratio: 60 dB (Mono/Stereo)
channel separation:
separation: 85 dB
frequency selection:
in addition to the wave selection:
mirror frequency attenuation: 75 dB
if rejection: 100 dB
ON-suppression:
output level: for TB(1kHz,5 mV on the Phono input) RCA> 320mV; DIN(10k643961b8da111c0a15d770a1109a86d4)-> 10mV
RDS: no
station memory: 6

FM: 87.5 - 104,05 MHz
MW: 513 - 1,602 kHz