|ONKYO Integra P-855NII
The preamplifier which added the study fundamental about a feeling of a
lateralization in an inside bass region etc., and it not only develops
further the measure against a transient response in an equalizer circuitry,
a tone circuitry, etc. which have been developed in the Integra serieses,
and a modification of a dynamic behavior, but raised completeness.
The dual channel scheme independent source which made the powering to
each channel on either side become independent is adopted.
This loses the
cross interferencee between the channels inside a preamplifier, and the
separation is raised.
The power-source part has adopted the feedback stable
type±2 power-source scheme voltage stabilizer whose regulation is 1.7%, and it
is considered so that the influence of a power supply variation may not come out
to the circuitry which performs a delicate voltage amplification.
transient response property is improved by using for an equalizer amplifier
circuitry the OP-amp type circuitry of one step of differential, and a
final-stage single 4 stone stream composition borne by the detailed theoretical
analysis to NF circuitry.
The OP-amp type circuitry of the 1 step of
differential 3 stone stream composition for which it opted from the circuit
analysis by computer using is adopted as a tone amplifier circuitry, and many
measures, such as selection of the optimal time constant, reservation of the
dynamic range in an open loop, and a modification of an SN ratio, are taken.
Thereby, although the transition was conventionally given to the riser
property of the important inside bass region with various members including NF
circuitry, this has been improved and the good circuitry of a riser is realized
irrespective of tone ON-OFF.
In order to prevent the it1 at the time of switchpoint ON-OFF, the transient killer circuit which uses a reed relay is
The film capacitor of a unguided extended foil structure, and
super-low leakage and a special electrolytic capacitor are adopted as the
coupling capacitor which has big influence on play sound.
trimming attenuator volume of an interlocking error of ±0.5dB is adopted as a
coordination of a volume and a tone, volumes are 43 contacts (an intermediate
position is also possible), and ±five steps of coordinations of a 2dB step are
possible for a tone.
Since the input of equalizer amplifier is
monitored, the peek monitor by light emitting diode is built in, and the
clipping point of an equalizer input can be monitored.
The loudness is
Low and the two-step change of Low&High.
||Phono1:1.2, 2.4, 4.8mV/100, 50, 30kohm
2.4 or 4.8mV / 50kohm
Tuner, AUX1, 2, Play:100mV /, 50kohm
|THD (at the time of 1V output 1kHz)
|Cross modulation distortion
||0.05% or less (at SMPTE, the time of 1V output
|RIAA property (Phono1, 2)
||Less than 30Hz-15kHz±0.2dB
|15Hz-70kHz+0 -0.5 dB
10Hz-100kHz+0 -1.0 dB
|Phono maximum permissible input
|S/N (IHF-A network)
|Phono1, 2:75dB or more
Tuner, AUX1, 2, Play: 90dB
|An Output voltage/impedance
||Output(at the time of a 100kohm load
intensity): 1V (rate), 10V (maxima)/600ohm
Rec Out(Phono): 100mV (rate) /
|Tone control (2dB step type)
||Treble: ±10dB (10kHz and F.Shift 2kHz
Bass: ±10dB (100Hz and F.Shift 400Hz o'clock)
||Treble: 2kHz, 8kHz, Defeat
|Loudness (volume 30dB location)
||+ 5dB (70Hz), +3dB (10kHz)
||High-Cut: 5kHz, 20kHz, 6dB / oct
Low-Cut: 50Hz, 10Hz, 12dB / oct
|Transient killer operating time
||At the time of SW-ON: About 7 seconds
the time of SW-OFF: Start from 0.5 second.
|The semiconductor used
||Transistor: 37 pieces
Diode: 40 pieces
light emitting diode: One piece
||Switched: Three lines
Four line total: 1100VA