The Sonic Frontiers SF -1 is a brilliant and highly acclaimed valve line stage preamplifier. Please note that this is a line stage unit and does not have a phono stage. The unit uses one (1) 12AT7A valve. These are readily available and very inexpensive. The “signature” sound of the SF-1 can therefore be easily customised to personal audio preference by simply experimenting with different types of valves. The unit is currently fitted with a close to new JJ valve. The unit has five line inputs. There are also two output stages for either bi-amping or the connection of ancillary equipment such as a sub-woofer.
Frequency response: 2Hz to 100kHz
Total harmonic distortion: 0.1%
Gain: 20dB (line)
Signal to noise ratio: 85dB (line)
Channel separation: 60dB (line)
Output: 2.5V (Pre out), 25V (Pre out Max)
Valve complement: 1 x 12AT7A
Dimensions: 19” x 12” x 4.5”
The volume has occasional static while adjusting, but no effect on the sound during playback.