SFL-3 SE vs Line 3
The Line 3 matches the SFL-3 SE on signal-to-noise (100 dB), thd (0.010%), output voltage (1.0V RMS), and weight (27.5 kg (61 lbs)).
Both turn up in the same documented systems.
AI-generated product photo — not official manufacturer imagery.
AmplifiersPre-AmplifiersTube AmplifiersDiscontinued
About the SFL-3 SE
The Sonic Frontiers Line 3 SE is a high-end, fully balanced tube line-stage preamplifier using 10 x 6922 and 2 x 6GH8A tubes, with eight line inputs and five line outputs (balanced and single-ended), plus tape and surround-processor loops. Volume is microprocessor-controlled in 0.5 dB steps, operated via remote control. The unit employs a large external power supply with three power transformers and 26 stages of regulation, separating audio circuits from display/control logic to improve noise performance and tube life. Contemporary reviews highlighted its neutrality, transparency, wide bandwidth, and strong dynamic/bass performance, positioning it as a reference-class preamplifier. Physical specifications are 480 x 360 x 115 mm and 27.5 kg. Sonic Frontiers ceased manufacturing electronics in the early 2000s; the Line 3 SE is no longer in production.
Specifications
Analog Output
Analog signal output specifications
- THD
- 0.010%
- SNR
- 100 dB
- Output Voltage
- 1.0V RMS
Connectivity
Input and output connections
- Analog Inputs
- line inputs
Physical Dimensions
Size, weight, and appearance
- Dimensions
- 480 × 115 × 360 mm (W × H × D)
- Weight
- 27.5 kg (61 lbs)
Specifications are community-contributed and may not be accurate or complete. Verify all details with the manufacturer before making purchasing decisions. Terms & Conditions