Pioneer D-23

June
1 9 7 6 june 1976
1 9 8 3 1983

Part of the famous Series 20, available well into the 1980s, the D-23 was advertised a lot, sold ok but not that much in the end. It was preceded by the SF-70, later complemented by smaller equivalents like the D-70.

Hifi Exclusiv made a big test for its may 1979 issue : the other units tested were the Sony TA-D88B, Accuphase F-5 and Mark Levinson LNC-2. The winner of this test was, sorry guys, the Sony.

The test however shows a better s/n ratio than spec'ed by up to 5dB, some divergence on frequencies depending on volume/slope (mainly at 500Hz which in fact turns out to be 466Hz, so a 6,8% error) and some overshoot at the 18dB slope due to the Butterworth structure.

The specs here published are a mix of of those from Pioneer and those from said test - a bit more accurate ;)


The dedicated japanese catalog is now at hand (2011) but nowhere near being translated...

Pioneer D-23, image 1 Pioneer D-23, image 2 Pioneer D-23, image 3
Pioneer D-23 specifications
Title Value
LOW & MID-LOW crossover : 63 / 80 / 100 / 125 / 160 / 200 / 250 / 320 / 400 / 500 / 630Hz
MID-LOW & MID-HIGH crossover : 320 / 400 / 500 / 630 / 800 / 1k / 1,25k / 1,6k / 2k / 2,5k / 3,2Khz
MID-HIGH & HIGH crossover : 1,6k / 2k / 2,5k / 3,2k / 4k / 5k / 6k / 8k / 10k / 12,5k / 16Khz
Slopes : 6 or 12 or 18dB per octave
Volume : linked L/R pots
0dB to -30dB by 1dB steps
-30dB to ¬
L/R volume accuracy : 0,7dB
Stereo separation : 50,5dB (high outputs)
Rise time : 0,7µs (6dB slope)
1,5µs (12dB slope)
1,3µs (18dB slope)
Input : 50kOhm [110kOhm ?]
Output impedance : 190 Ohm (low)
90 Ohm (mid)
70 Ohm (high)
THD : 0,005% (20Hz...20Khz at 1V output)
S/N ratio : 100dB (1V output)
Frequency response : 10Hz...100Khz (+0 / -1dB)
PC : 14W
Dimensions : 42 x 15 x 35,2cm
Weight : 8,7kg.
List price : 100,000¥ (1976)
1900DM (1979)
Pioneer D-23 : 0 topic
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page online since : july 2008
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page type : LGT / KNB
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