Like all the other Series 20 components from Pioneer, the D-23 is a serious component designed for critical listening. The D-23 is a multi-amp electronic crossover network to permit bi-amping (or even tri-amping). The crossover frequencies are divided into low, mid-low, mid-high and high. The range of the crossover frequencies could be varied within these four groups with the upper row of control knobs. The four larger knobs in the center are the level controls. The six smaller knobs at the bottom of the panel adjust the slope. Definitely a "big boy" toy.
- Production
- 1976-83
- Condition
- 8/10
- Serial No.
- WD1000839
- Orig. MSRP
- $499
- Restoration
- Full 30-point service check
- Cleaned controls, switches, and chassis
- Factory Specs
Type Electronic Crossover Network
Level control 0 to -30dB (1dB step)
Insertion loss 0 to -2dB
Output 1V to 10V (maximum)
Total harmonic distortion 0.005% (1V output), 0.1% (10V output)
Frequency response 10Hz to 100kHz
Hum and noise 100dB
Dimensions 16.5"W x 6"H x 14"D
Weight 19.2 lbs.
- Documentation
Pioneer D-23 Owner's Manual
- The History of Pioneer
- Pioneer was founded by Nozomu Matsumoto in 1938 in Tokyo as a radio and speaker repair shop. In December 1953 Mr. Nozomu Matsumoto succeeded in developing the first domestic dynamic speaker made of original parts. It was named A-8 and marketed in Japan under the Pioneer brand. It later became the origin of the HiFi ...
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- Liner Notes
A crossover network that emphasizes various functions and basic performance so that you can enjoy a wide range of multi-amplifiers from 2-way to 4-way. The buffer amplifier of the main circuit is a pure complimentary service SEPP circuit configuration with ± 2 power supply using a pair of low-noise transistors with uniform characteristics. This reduces even-order harmonic distortion components. In addition, the input impedance is set high and the output impedance is set low to prevent the influence of the CR element of the filter. In addition, the power supply supplies high voltages of + 30 V and -22V by the left and right independent constant voltage circuits, ensuring a wide dynamic range and eliminating mutual interference between channels. The bandwidth can be divided into four sections, Low/Mid-Low/Mid-High/High, and up to four ways of multiplexing can be achieved. The cutoff frequency is 11-point selection for each 1/3-octave band, and high cut and low cut are independent. The level control for each band is a 1-dB-step attenuator. The cutoff slope can be selected from 3 types : 6, 12 and 18 (dB/oct). For 6dB/oct. and 18dB/oct., the attenuation at the crossover point is -3dB. However, for 12dB/oct, when crossing at -3dB, the characteristics may increase due to the phase relationship. Therefore, only 12dB/oct is used as a -6dB cross. All slope switches are equipped with a flat position except for the low cut of the High position. By utilizing this, various types of multi-amplifier systems from 2 way to 4 way can be freely configured.
- Stock No.
- 7940474634461
Like all the other Series 20 components from Pioneer, the D-23 is a serious component designed for critical listening. The D-23 is a multi-amp electronic crossover network to permit bi-amping (or even tri-amping). The crossover frequencies are divided into low, mid-low, mid-high and high. The range of the crossover frequencies could be varied within these four groups with the upper row of control knobs. The four larger knobs in the center are the level controls. The six smaller knobs at the bottom of the panel adjust the slope. Definitely a "big boy" toy.
