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The Sonic Frontiers SFS-40 is a Canadian stereo tube power amplifier rated at 45 watts per channel from a pair of EL34/E34L output tubes per channel. Its specifications include a frequency response of 5 Hz to 40 kHz ±0.5 dB, 0.8 V input sensitivity, and 100 kΩ input impedance. The amplifier uses four EL34/E34L output tubes and four 6DJ8 tubes, with front-panel metering and controls for setting output-tube bias. It has a brushed stainless-steel chassis and measures 16 × 12.5 × 7 inches, weighing approximately 36 lb (16.5 kg).
Amplification power output and characteristics
Analog signal output specifications
Size, weight, and appearance
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions
The closest alternatives on specs, description and the systems they turn up in, with the specs they share set side by side.
The Stereo 90 Magnum's power @ 8ω is 90W against the SFS-40's 45W, its high-frequency extension 50 kHz against 40 kHz, and its output voltage 1.0V RMS against 0.8V RMS. Both share low-frequency extension (5 Hz).
The Stereo 40 MKIII's power @ 8ω is 40W against the SFS-40's 45W, its weight 25 kg (55 lbs) against 16.5 kg (36 lbs), and its width 390 mm against 406 mm. Both share class (A).
The JD-302B's power @ 8ω is 50W against the SFS-40's 45W, its output voltage 0.5V RMS against 0.8V RMS, its weight 17.69 kg (39 lbs) against 16.5 kg (36 lbs), and its height 190.5 mm against 178 mm.
The ProLogue Classic's power @ 8ω is 40W against the SFS-40's 45W, its low-frequency extension 10 Hz against 5 Hz, its high-frequency extension 65 kHz against 40 kHz, and its class Tube against A.
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