|ONKYO Integra M-506
|170,000yen(around the 1979 time)
Stereo power amplifier which adopted W and a super
The harmful component was made to feed back through servo
amplifier from both by the side of + of an outgoing end, and -, and W and the
super servo scheme to cancel are adopted.
+ A side cancels the
super-low-pass component which is superimposed by the music signal and flows
into a speaker, and is suppressing the occurrence of harmful cross modulation.
Moreover, the servo loop by the side of - holds down the electromotive force
which originates in a part for a part for the impedance which exists between the
grounding side of an input, and the grounding side of an output, and the
impedance by internal resistance, or the lead wire and others of a power source
capacitor, and is generated, and it serves to send out only a music signal to an
By carrying out the servo control of the both ends by the
side of an output, resolution is improved by expiry of the impurity which was
carrying out the mask of the music signal, a harmful noise, and a distorted
An output stage is a three-step Darlington stream
composition, and little distorted output is realized by using high fT power
transistor. Furthermore, the performance characteristic of a power transistor is
made into original linear switching of Onkyo, and the improvement in a
distortion is aimed at much more.
It was developed in the
intention that this scheme takes out the property of a first class in amplifier
paying attention to only the final output stage usually working as a B class
while employing the merit of B class efficiently,A bias is a scheme with the
linear property developed by the basis of the design policy that it must fix, and demonstrates the performance excellent in combination with high fT power
The newly developed twin whined scheme large-sized
transformer is used for a power-source part as a result of pattern research of
influence in a tone quality. Moreover, as a result of investigating the
correlation of a careful hearing and the physical properties of a material in
consideration of importance, the low-impedance wide-range chemicon of a
multi-tab scheme is used for the chemicon for a rectification as the printed
circuit board and a low inductance circuitry made to link directly.
Furthermore, thorough low-impedance-ization, such as using a bus (bus-bar)
line for the power feeding & power distribution to each section and an earth
line, is attained.
In the case of a rapid transition in the continuous
small-size width operation from a large swing operation, a heat ramp arises from
the difference in heat capacity in each inter-block of a final. This rapid
partial temperature change makes the bias-current value of a power part
unstable, and affects especially a play of the Loule bell signal.
measure to this, the sensing bias circuit was earned on M-506 3 point to the
output stage, a pre-driver part, a driver part, and three differences of
temperature of a power transistor were detected, the bias is controlled, and the
stable low-distortion drive is guaranteed.
While adopting a monolithic
IC as a protection network and raising a stability, the overcurrent of a
direct-current leakage voltage and the や power stage which appears in a speaker
termination is detected, also in an emergency, a relay (a silver contact and a
parallel using) is intercepted in an instant, and circuit component part is
The speaker switching has prevented the failure of the dumping
factor by switching a protection relay of SP-1 and 2 special purpose. Moreover,
the low pass filter of the amount of direct-current-voltage detections, and also
when polarities on either side differ by lower-right independency, it works.
The large-sized peek meter which performs a logarithmic comression and a
peek hold by a monolithic IC with a sufficient stability is adopted.
Moreover, in order to acquire a high-speed responsibility, it is driving in
the exclusive drive circuitry by operational amplifier.
The level can switch
0dB to 120W and 12W with a front switchpoint.
Examination by the hearing
put into practice from a resistor, capacitors, the printed circuit board, and
the lead wire for a product line to the solder for weldings is repeated and
adopted from the semiconductor device and the transformer relationship.
||W and super servo scheme stereo power amplifier
|Effective output (20Hz - 20kHz)
|Dynamic power (1kHz)
|THD (THD, 20Hz - 20kHz)
||0.003% or less (at the time of an effective
0.003% or less (at the time of 60W output)
|Cross modulation distortion (SMPTE
||0.003% or less (at the time of an effective
|Power Band Width (IHF-3dB, THD 0.2%)
||5Hz - 100kHz
||1Hz-100kHz+0 -1.5 dB
|SN ratio (IHF-A network input shunt)
|Speaker load impedance
|Dumping factor (8 ohms, 1kHz)
||Speaker System1, 2
|Transient killer operating time
||- 40dB - +4dB
|Speed of response
|The semiconductor used
||Transistor: 47 pieces
FET: Two pieces
IC: Six pieces
Diode: 40 pieces
||A maximum of 600W
un-interlocking.: One line
||190W (Electrical Appliance and Material
|The maximum Dimensions
||Width 450x height 174x depth of 400mm