DYNACO PAS-3X
Finished products : Released in 1959
¥ 42,000 (around 1970)
¥ 49,500 (around 1973)
¥ 92,000 (around 1976)
Kit : ¥ 64,900 (around 1976)
Commentary
A tube type preamp built by Dynaco based on a consistent basic policy.
Distortion is reduced by applying negative feedback across the entire circuit.
A special volume is used for the tone control, and when the knob is placed in the middle point, the tone control circuit is detached and becomes a flat amplifier.
Also, both Bass and Treble adjust the left and right channels independently.
With a special input circuit, it is possible to use a microphone or phono.
There was a wooden case sold separately.
Model Rating
Type | Tube type stereo preamplifier |
Frequency characteristic | 10 Hz ~ 40 kHz ± 0.5 dB (Aux) |
Harmonic distortion factor | Below the measurement limit |
Cross modulation distortion factor | 0.05% or Less (at 2 V, Rated Output) |
Signal-to-noise ratio | Phono:74dB Aux:85dB |
Input circuit | Phono, Tape head, Special (used as Phono2) Mic (can be used as Phono3), Tape head AM-FM, FM-multi, Tape, Spear |
Input sensitivity | Phono:2.5mV Tape head:188mV Spear:100mV |
Input impedance | Low level : 50k Ω High level : 250k Ω |
Output voltage | 10V/100k Ω |
Phono allowable input voltage | 250mV |
Tone control | Bass : ± 20 dB (20 Hz) Treble : ± 18 db (20 khz) * ± 14 db in the 1973 catalog Left-right independent |
Semiconductor used | 12AX7 : 4 Pieces 12X4 : 1 Piece |
External dimensions | Width 343x Height 108x Depth 230 mm |
Weight | 4.8 kg (according to 1973 catalog) 5 kg (according to 1974 catalog) 4 kg (according to 1976 catalog) |
Sold Separately | PAT-4/PAS-3X Common Wooden Case (¥ 3,900, circa 1970) Wooden Case DW-1 (¥ 6,500, around 1976) |