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| Pioneer D-23 |
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| 100,000yen(around the 1980 time) |
The crossover network which thought [ that
multi-amplifier can be broadly enjoyed from two ways to four ways, and ] the
variegated functionality and the basic performance as important.
The
buffer amplifier of a main circuit has pure complimentary SEPP circuit
composition of ±2 powering with the low-noise transistor of a pair to which the
property was equal, and, thereby, is reducing the eventh higher-harmonic
distorted component.
Moreover, the Output load impedance was highly set up
for the input impedance low, and the influence of CR element of a filter is
prevented.
Furthermore, the power source has eliminated the cross
interferencee between channels while it supplies the high voltage of +30V and
-22V and secures a large dynamic range by the voltage stabilizer which achieved
the right-and-left independency.
Multi-izing to four ways is possible
for a band splitting at four splittings of Low/Mid-Low/Mid-High/High.
A
cut-off frequency is the 11-point selection for every one-third octave,
respectively, and the high cut and the low cut have been independent.
The
level control of each band has adopted the attenuator type of a 1dB step.
The shutdown slope can choose three kinds, 6, 12, and 18 (dB/oct).
Although the attenuation in a crossing point of 6 dB/oct and 18 dB/oct is
-3dB, in 12 dB/oct, since it may have been piled by the property due to a phase
when it is made to cross by -3dB, only when it is 12dB / oct, it is considered
as a -6dB cross.
A low cut of a High position is removed in a slope change,
the flat position is altogether carried in it, and the multi-amplifier system
various type from two ways to four ways can be freely constituted by utilizing
this in it.
|
| Form |
Electronic crossover network
|
| Circuit system |
| Buffer amplifier part : |
Positive/negative 2 power-source Class-A
SEPP |
| Filter part : |
CR passive filter (6 dB/oct, 12 dB/oct)
CR active-filter +CR passive filter (18 dB/oct)
2, 3, 4 way possible
|
|
| Cut-off frequency |
Low (High Cut), Mid Low (Low Cut)
63,
80, 100, 125, 160, 200, 250, 320, 400, 500 or 630Hz
Mid Low (High Cut), Mid
High (Low Cut) :
320, 400, 500, 630, 800, 1k, 1.25k, 1.6k, 2k, 2.5k, 3.5kHz
Mid High (High Cut), High (Low Cut) :
1.6k, 2k, 2.5k, 3.2k, 4k, 5k, 6k,
8k, 10k, 12.5k, 16kHz |
| Slope property |
6 dB/oct, 12 dB/oct, 18dB / oct
|
| Level control |
0--30dB (1dB step), -infinity, a
right-and-left channel independent variable |
| Insertion loss |
0--2dB |
| Input impedance |
100kohm |
| Output load impedance |
4kohms (MAX) |
| Output (RL:50kohm) |
1V, 10V (MAX) |
| THD (20Hz - 20kHz) |
0.005% (1V output)
0.1% (10V output)
|
| Frequency characteristic (Low end/High end)
|
10Hz/100kHz +0 -1dB |
| SN ratio (output 1 V:00) |
100dB (IHF, A network, a short circuit)
|
| The semiconductor used |
Transistor: 71 pieces
Diode, other:18
piece |
| Supply voltage |
100V, 50Hz/60Hz |
Power consumption
(Electrical Appliance and Material Control Law) |
11W |
| AC outlet |
Power-switch un-interlocking.: One line
|
| Dimensions |
Width 420x height 150x depth of 352mm
|
| Weight |
8.7kg |
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