Technics SE-9021A
¥ 59,800 (around 1979)
Commentary
A stereo DC power amplifier that can be paired with the SU-9011A that adopts DC amplifier design.
In addition to the input / output coupling capacitor, the interstage capacitor has been removed to realize flat frequency characteristics and excellent phase characteristics up to ultra-low frequencies.
The FET used in a DC amplifier is not used, but a dual transistor is used in the first stage to achieve excellent DC stability.
Equipped with a high-precision peak meter.
Model Rating
| Type | Stereo DC power amplifier |
| Power Amplifier Unit | |
| Effective output (both channel drive) | 60W + 60W (8 Ω, 20 Hz to 20 kHz) 65W + 65W (8 ohm, 1 khz) |
| Total harmonic distortion factor | 0.01% (20 Hz to 20 kHz) |
| Cross modulation distortion factor | 0.01% |
| Frequency characteristic | 0 Hz ~ 150 Hz + 0 -3dB 20 Hz ~ 20 kHz + 0 -1dB |
| Signal-to-noise ratio (IHF-A) | 115dB |
| Residual noise | 100 μ V |
| Input Sensitivity / Impedance | 1V/47k Ω |
| Damping factor | 100 (8 Ω) |
| Load impedance | Main or Remote : 4 Ω ~ 16 Ω Main + Remote : 8 Ω ~ 16 Ω |
| Output Bandwidth (both channels, 8 Ω) | 5 hz to 60 khz -3dB |
| Meter Section | |
| Attack time | 100 μ sec |
| Recovery time | 750 msec (0 → -20dB) |
| Meter range | + 3 dB to -50dB |
| <General> | |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 140W |
| External dimensions | Width 430x Height 97x Depth 331 mm |
| Weight | 9.7kg |