LUXMAN PZ12B
¥ 19,000 (around 1970)
Commentary
As an improved version of PZ12, this preamplifier inherits the flow from PZ11.
The circuit has a simple structure and consists of 13 silicon transistors and one silicon diode.
The equalizer stage uses a direct-coupled NF circuit using two low-noise transistors, and the equalizer characteristics use the RIAA curve. The intermediate amplifier stage also uses the same two stage direct-coupled NF circuit as the equalizer stage.
The output stage uses an emitter-follower circuit to keep the output impedance low at approximately 100 Ω.
The tone control part uses NF type of Lux-system.
Inputs Aux1 and Aux2 switch the sensitivity of one auxiliary input terminal.
The tone control is a left-right interlocking type.
Power switch linked volume is adopted.
The front panel is designed with an aluminum plate embedded in a plastic frame.
The knob is finished with aluminum alumite finish, and the hood is finished with a gray paint of aluminum material that is drawn with a mold.
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Model Rating
| Type | Control amplifier | ||
| Total harmonic distortion factor | 0.1% or Less (1 V, 1 kHz) | ||
| Frequency characteristic | 20 Hz to 50 kHz -1dB | ||
| Output voltage | 1 V (rated) 4 v (max) |
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| Output impedance | Approximately 100 Ω | ||
| Input Sensitivity / Impedance | Phono : 1.6mV/50k Ω Aux1 : 60mV/50k Ω Aux2 : 800 mV (1 V, 1 kHz) / 130k Ω |
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| Signal-to-noise ratio | Phono : 60 dB or more Aux : 75 dB or more |
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| Tone control | LUX System NF Type | ||
| Equalizer | RIAA | ||
| Semiconductor used |
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| Pwer | 100 VAC, 50Hz/60Hz | ||
| Power consumption | 2W | ||
| External dimensions | Width 218x Height 37x Depth 130 mm | ||
| Weight | 1kg |
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