Audio Database

The pictorial image of AU-D707XCD DECADE

SANSUI AU-D707XCD DECADE 145,000yen(around the 1986 time)

Description
 
The Integrated Amplifier developed for the purpose of the purer play of the digital sources, such as compact disk.

In order to reappear without spoiling the sound quality of compact disk as much as possible, compact-disk direct position is carried.
If compact-disk direct switchpoint is pushed, the signal from a compact disk player will be inputted into a direct twin diamond X balance part only via an exclusive volume, without passing through various switchpoints or a circuitry.

The special 4-unit Detent volume which has arranged the volume only for compact disk and the master volume on the coaxial is adopted as a volume part. Moreover, it is considered as the advantageous low-impedance type also in tone quality.
The loudness-level-of-sound window in compact-disk direct position is usually different from a position, and compact-disk direct position indicator lights up, and it is directed to the volume knob side.

The twin diamond X balance scheme is adopted as a power amplifier part.
In this circuit system, equally, were balance-inputting the positive and negative side, are transmitting it, are amplifying it, and a hum and a noise are canceled, and also since the grounding is separated completely, it is not influenced by a grounding.
Moreover, with the usual amplifier, the counter-electromotive force from a speaker flows into the earth line of the negative side combination, the ripple current etc. and the cross interferencee of a power source are caused, and IHM distortion may be generated. However, with X balance amplifier, the current supply source to a speaker is considering a power transistor as 2 team stream compositions of carrying out an electric-current drive, by a twin diamond differential circuit in addition to the positive and negative side serving as the same requirements, and has heightened speaker drive capacity.

The heavy weight class power transformer and the pure Focus capacitor are adopted as a power-source part.

The large-sized heat sink is adopted.

The Subsonic Filter of 6Hz of cut-off frequencies is carried.

The tone control with a turnover-frequency change is carried.

The speaker selector of four positions is carried.

The REC selector with an off-position is carried.

In addition to compact disk, Tuner, Line1/2, Tape1/2 / 3, the input terminal carries the Adaptor termination convenient for an interconnection of a graphic equalizer etc. Moreover, the gilding treatment is performed to the input terminal of a compact-disk, Tuner, and Line system.

The power cord with a polar window is adopted.

Block The
A

Rating of a mode
Form Integrated amplifier
<Power amplifier part>
Effective output (10Hz - 20kHz, both channel drive) 160W+160W (6ohms)
130W+130W (8ohms)
THD (10Hz - 20kHz) 0.003% or less (at the time of 8 ohm and an effective output)
0.005% or less (at the time of 6 ohm, and 1 / 2 effective output)
Cross modulation distortion (60Hz:7kHz=4:1, SMPTE) 0.003% or less (8ohms)
Dumping factor (new IHF, 20Hz - 20kHz) 100 (6ohms)
Frequency characteristic (1W) DC-300kHz+0 -3dB
Input sensitivity/impedance (1kHz) compact disk Direct: 0.5V/5kohm
Slew rate ±200v/microsec (8ohms)
Rise time 0.5microsec
Headphone output 500mW (33ohms)
Load impedance 4ohm-16ohm
<Preamplifier part>
Input sensitivity/impedance (1kHz) Tuner, compact-disk:150mV /, 47kohm
Line 1, 2:150mV / 47kohm
Tape play1, 2 or 3:150mV / 47kohm
Adaptor: 150mV / 47kohm
SN ratio (A network) compact disk, Tuner, Line: 110dB or more
The tone control maximum variation Bass: ±10dB (20Hz)
Treble: ±10dB (20kHz)
Turnover frequency Bass: 100Hz, 200Hz
Treble: 4kHz, 8kHz
Subsonic Filter 6Hz (-3dB), 6dB / oct
Audio muting -20dB
<Synthesis>
Power dissipation (Electrical Appliance and Material Control Law) 320W
Dimensions Width 466x height 161x depth of 431mm
Weight 20.6kg