Sonic Frontiers SFS-40

1 9 9 2 1992
1 9 9 6 1996

Now a brand absorbed into Anthem AV, Sonic Frontiers started as a high-end parts distributor in 1987 : Wima, Vishay, WBT, Gold Aero, Cardas, ALPS et al.

The transition from parts supplier to manufacturer happened in the 1987, first as kits (SFM-75) then as factory built - with much success ahead.

Alongwith the SFS-80, the SFS-40 is part of the first non-kit Sonic Frontiers lineup and is centered around two EL34.

"There is a growing recognition by today's sophisticated audiophile that tube technology, rather than solid state, is the best means of attaining harmonic accuracy, correct tonal balance, realistic soundstaging, lifelike dynamics and the greatest sense of overall musicality.

With this in mind, Sonic Frontiers has been developing tube electronic products of uncompromising quality which make these sonic goals a reality. They are achieved through the proper execution of modern design principles, superior parts quality, skilled hand craftsmanship while utilizing the inherent strength of the classic vacuum tube.

The SFS-40 Stereo Tube Amplifier offers audiophiles with moderate power requirements, an extremely musical amplifier at an affordable price. This amplifier is ideal for those with medium to high efficiency loudspeakers (mini-monitor, bookshelf, small planar, etc...) and smaller listening environments, but it is capable of driving suprisingly difficult loads effortlessly.

Twin 6DJ8, differential cascode circuit for the input/driver stage with a regulated B+ supply

Regulated Screen and Bias supply

Front panel bias meter with externally mounted adjustment controls

#4.304 Brushed Stainless Steel (non-magnetic) chassis

State-of-the-Art passive parts quality: MIT MultiCap, Holco, Cardas (custom cable and RCA jacks), Edison-Price, etc...

Conservatively rated, high capacity power supply, with polypropylene shunt capacitors

Custom-wound, output transformer with a core of grain oriented silicon steel (8th generation proprietary design)

Low feedback design : only 7db (on the 3.5 Ohm tap)

Sonic Frontiers SFS-40, image 1 Sonic Frontiers SFS-40, image 2
Sonic Frontiers SFS-40 specifications
Title Value
Power : 2x 45W (RMS, 20Hz...20Khz)
2x 50W (RMS, 1Khz, 40Ma bias)
Frequency response : 5Hz...40Khz (± 0,5dB)
4Hz...90Khz (± 3dB)
Input : 100kOhm / 0,8V RMS (1Khz, for 40W output)
PC : 250VA max.
Dimensions : 16" x 12,5" x 7"
Weight : 16,5kg.
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page online since : december 2008
page updated : september 2010
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