Pioneer M-Z1

Pioneer M-Z1a

1 9 8 0 1980
1 9 8 1 1981
1 9 8 4 1984

Completely unknown elsewhere, the Z1 series nevertheless sold extremely well in Japan - a staple of the well-heeled audiophile rigs of the times, alongwith the Exclusive P3 turntable.

The Z1s were Pioneer's entry into 1980s super high-end of the non-NFB kind through the Super Linear Circuit for the voltage amplifying stage.
The SLC works with two transistors : cancelling the non-linearity of the first with the second's non-linearity in reverse mode.
Since there is no NFB loop(s), DC stability is achieved with a double-locked servo regulator.

The output transistors are three pairs of LAPT devices (2SA1187 / 2SC2838) all working in Class A, naturally : the M-Z1 are hot boxes.

Two transformers, select and non-magnetic parts, glass-encased caps with carbon-coating inside glass and special electrode foil, 140µ glass-epoxy boards, OFC wiring - and then some.
At 320,000¥ apiece, this was for the non-compromising indeed, but for the well-heeled only as well.


The original M-Z1 was quickly replaced by the M-Z1a upgraded version, although the upgrades were of the minor kind (and invisible) ; the "a" versions sold much better.

Still abundant and sough-after in Japan... still non-existent elsewhere.

Pioneer M-Z1, image 1 Pioneer M-Z1, image 2 Pioneer M-Z1, image 3
Pioneer M-Z1 specifications
Title Value
Effective power : 1x 60W (8 Ohm, 20Hz...20Khz)
Input : 1V / 50kOhm
Output terminal : for 8 Ohm speaker
Damping factor : > 80 (20Hz...20Khz, 8 Ohm)
Meters : logarhitmic 20-point
Meter's range : 0,001W...100W
PC : 220W
AC outlets : 1x non-switched (100W max.)
Dimensions : 22 x 18,5 x 44cm
Weight : 19,1kg
List price : 320,000¥ (1980...1984)
Pioneer M-Z1 : 0 topic
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page online since : april 2007
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