Audio Database

The

NEC AV-300PRO
139,800yen(around the 1989 time)

Description
 
Audio-video surround center corresponding to Dolby prologic surround.

The Dolby surround decoder is carried and Dolby prologic surround is supported.
Furthermore, in order to always set the Dolby prologic in the best status, the auto input balance which rectifies the Lch-Rch level balance of an input signal automatically is carried.

It is possible to carry the dual center functionality in center channels, and to improve the lateralization of a center.
Moreover, when a center speaker differs from a front speaker, the newly developed parametric equalizer is carried so that the tone quality of a center channel can be adjusted.

The independent digital delay circuitry is carried 2 ch.
Delay time is the span of 0msec - 30msec (it is an independent setups possible of a right-and-left channel in the span of 15msec - 30msec at the time of the Dolby prologic), and a fine tune of 1.5msec steps is possible for it.
Moreover, the master volume has adopted the motor drive which remote control can also control.

Three center channel modes are carried.
A normal mode is the mode suitable for using a small center speaker, the signal with which 100Hz or less was cut is sent to a center channel, and a signal of 100Hz or less is distributed to right and left of a front.
The wide mode is the mode which was suitable when the speaker more than a bookshelf type was used for a center, and sends a signal to a center channel as it is.
Moreover, in phantom mode, a center speaker is not used, but a signal is waved and divided into right and left of a front.

3ch logic mode which was suitable when a rear speaker was not used is carried.
A surround signal is made to output from right and left of a front, and it is made to orientate in this mode in the location supposing a rear speaker.

A power amplifier part is considering all five amplifier as a discrete stream composition, and has acquired the outstanding property.

audio-video selector, surround, an attenuator (loudness level of sound), a testing tone, the output level of a sound volume, and the operating state of a stea meter (lateralization of an image) can be displayed by the liquid crystal display and an onscreen.
Furthermore, the onscreen display screen is a system set window, and can be chosen out of off and 3, 5, 7, and 9 seconds.

According to each input level, ATT level can carry out remote control presetting of 0dB - the 13dB in the span of a 1dB step.
The ATT circuitry has adopted the discrete ATT circuitry which uses the bipolar transistor focused on a tone quality.

The testing tone which uses a noise sequencer is carried and a sound-volume balance coordination of each channel is possible.

The REC serector, the Lec sound selector, and the Lec monitor are carried.

The sleep timer functionality is carried and the setups by 3 hours is possible per 10 minutes.
1 minute before a power source is shut off by a timer, AUTO FADE OUT operates.

The BSVA system control functionality in which a control with the BSVA system of NEC is possible is carried.

The multifunctional wireless remote control which carries a learning function is attached.
The sound-volume balance of each channel of 5ch and the sound volume of a 5ch all channel are controllable at a 1dB step with a remote control operation.

There was also a black model besides a silver model.

Rear Attached

Rating of a mode
Form audio-video surround center
<Amplifier part>
Output power (EIAJ, 1kHz) Front: 100W+100W (6ohm)
Center: 100W (3ohm)
Rear: 50W+50W (6ohm)
Frequency characteristic 10Hz-100kHz+0 -3db
SN ratio (IHF-A) 115dB
<Selector part>
Audio
Input sensitivity/impedance
Phono man month: 2.5mV / 50kohm
compact disk, Tuner, Aux, Tape1/2, VIdeo1/2/3, VDP, BS/TV, V-Aux:150mV /, 50kohm
Main in: 1V/20kohm
Audio
An Output voltage/impedance
Tape1, 2, Video1, 2 or 3:150mV / 2.2kohm
Pre out: 1V/1kohm
Mono out: 1V/1kohm
Video system
Input sensitivity/impedance
Video: 1 Vp-p/75ohm
S image Y signal: 1 Vp-p/75ohm
S image C signal: 0.28 Vp-p/75ohm
Video system
An Output voltage/impedance
Video: 1 Vp-p/75ohm
S image Y signal: 1 Vp-p/75ohm
S image C signal: 0.28 Vp-p/75ohm
<Decoder part>
Analog (Video in/Front out, it1)
THD (1kHz) 0.01%
Frequency characteristic 20Hz-100kHz+0 -3 dB
S/N ratio (IHF-A) 90dB
Digital (Video1 in/Rear out, Pro Logic)
THD (1kHz) 0.4%
Frequency characteristic 20Hz-7kHz+0 -3 dB
S/N ratio (CCIR-ARM) 76dB
<Synthesis>
Supply voltage AC100V, 50Hz/60Hz
AC outlet Interlock: Two lines, a maximum of 100W
Un-interlocking.: One line, a maximum of 200W
Power consumption 260W
Dimensions Width 430x height 166x depth of 450mm
Weight 17.9kg
Adjunct Wireless remote control LAR-300