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| NEC AV-7000D |
|
| 89,800yen(around the 1988 time) |
Digital one / surround amplifier which carries twin
PLL.
The low-pass play at the time of the Oide power is raised by carrying the
original reserve power source of NEC carried also in A-10 series, and carrying
another power source which delays the phase of an output 90 degrees and
fills the valley of a ripple.
In order to
align correctly the source in which sampling frequencies differ and to carry out
a higher-precision translation by a digital analog converter, the twin PLL
circuitry is carried.
In this circuitry, the Jitter was sharply decreased by
considering the PLL circuitry for a clock extraction as a two-step stream
composition in series, and the modification of a tone quality is realized.
Carry the oversampling digital filter in the D-A-conversion part 8
times, and the digital-audio signal was made to approach the wave which was
smoother and continued, except an audio signal, it made it possible to use a
very high frequency component, and the burden of a low pass filter is eased.
This has realized the expansion of a passband, and the modification of phase
distortion.
Moreover, by making the digital analog converter of glich res which makes
a deglitcher circuitry unnecessary a twin stream composition, the phase
difference between right-and-left both channels is lost, and the modification
of the S/N ratio is aimed at.
The surround circuitry of Dolby surround and
hole surround is carried.
Moreover, the acknowledged digital delay was
adopted as the delay circuit, and little surround play of a noise is realized.
A selector functionality can be used also by a power stand-by state.
The digital direct switchpoint is carried, and if a switchpoint is
turned ON, regardless of the status of digital ones/analog switch, the source of
hope can be chosen only with a digital input switchpoint.
Moreover, the
surround circuitry operates in this status.
BS Lec switchpoint is
carried, and a satellite broadcasting can be recorded and recorded regardless of
the status of other switchpoints with the video system and audio equipment which
were connected to each termination of Video1, Video2, and Tape2.
The REC
selector which can record special NetWare programs other than a monitor is
carried.
Moreover, the surround selector which makes an image and voice
cross and can do a picture recording and a sound recording is carried.
The speaker-off switchpoint and the mono-out termination are carried.
The motor volume whose volume can be controlled is carried in the volume
with remote control.
Wireless remote control is attached and NECBS
tunerNE-BST5000 and NE-BST2000 can be controlled.
|
| Form |
audio-video surround center
|
| <Amplifier part>
|
| Output power |
Front: 80W+80W (20Hz - 20kHz, 0.009%, 6ohms)
Rear: 20W+20W (1kHz, 5%, 6ohms) |
| THD |
0.009% (1kHz, 6ohm, 80W) |
| Frequency characteristic |
10Hz-100kHz+0 -3 dB |
| S/N ratio |
Phono:76dB
High Level:100dB
|
| Tone control |
Bass: ±10dB (100Hz)
Treble: ±10dB
(10kHz) |
| Delay time |
20msec (rear speaker) |
| <Digital part>
|
| Correspondence sampling frequency
|
32kHz, 44.1kHz, 48kHz (automatic switching)
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| Input sensitivity/impedance |
Light: -23dBm-+14dBm
Coaxial: 0.5 Vp-p/75ohm |
| An Output voltage/impedance |
Coaxial: 0.5 Vp-p/75ohm |
| <Analog part>
|
| Input sensitivity/impedance |
Phono: 2.5mV / 47kohm
High Leve: 150mV / 47kohm
|
| An Output voltage/impedance |
Rec out: 150mV / 2.2kohm |
| <Video-system part>
|
| Input sensitivity/impedance |
Video: 1 Vp-p/75ohms
S terminal (Y
signal): 1 Vp-p/75ohms
S terminal (C signal): 0.28 Vp-p/75ohms
|
| An Output voltage/impedance |
Video: 1 Vp-p/75ohms
S terminal (Y
signal): 1 Vp-p/75ohms
S terminal (C signal): 0.28 Vp-p/75ohms
|
| <Synthesis>
|
| Supply voltage |
AC100V, 50Hz/60Hz |
| Power consumption |
250W |
| Dimensions |
Width 430x height 165x depth of 435mm
|
| Weight |
15.8kg |
| Adjunct |
Wireless remote control AR-7000D |
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