KRELL KRS-100
¥ 2,380,000 (1 set of 2, released in 1987)
Commentary
Monaural power amplifier of KRS (Kroell Reference Standard) series.
An orthodox pure A class circuit is used for the circuit system.
The KRS-100 does not use a cooling fan, which cannot be avoided with a high-power A-class amplifier, and is designed to use natural convection for cooling, thereby reducing the noise generated by the cooling fan.
The pure A-Class circuit has a balanced configuration similar to that of high-end units, which enables direct balanced connection with a control amplifier with balanced output.
The output stage is a combination of 16 power transistors and 8 power MOS-FETs, which can be used for low-load drives and ultra-low load of 1 Ω.
The power transformer of the power supply section is a 1.8 kva heavy class transformer. Moreover, the plus and minus windings of the balance circuit are separated for exclusive power supply. There are six power supply capacitors of 40,000 μ F, for a total of 240,000 μ F.
Model Rating
| Type | Monaural power amplifier |
| Rated Output (20 Hz to 20 kHz, Continuous) | 100W (8 Ω) 200W (4 Ω) 400W (2 Ω) |
| Input Sensitivity / Impedance | + 4dB/47k Ω |
| Total harmonic distortion factor | 0.05% or Less (20 Hz to 20 kHz, 1W to Rated Output) |
| Frequency characteristic | DC ~ 100 kHz -0.1 dB (1W, 8 Ω) |
| Signal-to-noise ratio | 100dB |
| Damping factor | 300 or higher |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 600W (per vehicle at idle) |
| External dimensions | Width 565x Height 305x Depth 618 mm |
| Weight | Approx. 59.5 kg |
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