COUNTERPOINT SA-3
¥ 380,000 (year unknown)
Commentary
A control amplifier developed as an economy model to inherit the vacuum tube pre-concept accumulated in SA-5.
It consists of two circuits, vacuum tube and solid state, and brings out the advantages of each circuit.
In addition, by devising a circuit that maintains and supplies a stable voltage using solid state technology, the extra burden on the vacuum tube is reduced and the life is extended.
The power supply unit is separated from the chassis body to eliminate bad effects such as hum.
The SA-3 power unit supplies approximately 50 joules as power source.
TBD-15 vacuum tubes have been tested for more than 100 hours and have excellent characteristics. These high-voltage tubes with excellent linearity are constructed with a cathode follower circuit to achieve stable characteristics and excellent sound quality.
In addition, the performance of the vacuum tube is brought out by complete bias adjustment.
Model Rating
Type | Tube type control amplifier |
Input impedance | Phono : 47k Ω (100 ph) |
Gain | 52dB |
Total harmonic distortion factor | 0.18% |
Output level | 70 v (max) |
Output impedance | 3k Ω |
RIAA deviation | 40 Hz to 18 kHz ± 0.1 dB |
Rise time | 12 μ / sec |
Output bandwidth | 5 Hz ~ 27 kHz (50k Ω load) |
Signal-to-noise ratio | Phono:83dB |
Vacuum tube used | 6DJ8x3 |
External dimensions | Width 483x Height 58x Depth 300 mm |
Weight | 8.1kg |