OWNER’ S MANUAL THE SON IC F R ONT I ERS S FL- 1 & SF L-1 S IG NATU RE PREA MPL IFIER
OPERATION, CONNECTIONS AND CONTROL FUNCTIONS A B C D A-Selector Switch - This knob is turned to select an Input (P) through (S). The Selector Switch is bypassed when the SFL-1 is in the Direct mode as selected by the Direct/Normal Switch (B). B-Direct/Normal Switch - When in the DIRECT position, this toggle switch selects the Direct Input (O) from a preferred source, allowing the source signal to bypass all unnecessary control functions.
Back view of the Signature version with Kimber jacks. J K L M J- Detachable Power Cord Socket - Plug the Detachable Power Cord into this socket (see Figure 1). The SFL-1 is factory set for the correct operating voltage for the area in which it is sold (see shipping box for voltage setting). If a different operating voltage is required, please contact an authorized Sonic Frontiers dealer, distributor or the factory directly. K-AC Line Fuse - This is the AC fuse socket.
INSERTION OF THE TUBE OPERATION OF THE SFL-1 PREAMPLIFIER The SFL-1 comes with a 12AT7A (Ei) tube and the Signature model with a CV4024/M8162 tube, individually boxed and bagged along with a cotton glove, screwdriver, and screws for fastening the SFL-1 cover. If desired, replacement of the tube may be done to suit the listener’s preference.
To record from a source, place the Tape/Source Switch (C) in the SOURCE position and commence recording. To play back a tape recording, place the Tape Source Switch in the TAPE position. Muting the SFL-1 Preamplifier is achieved by placing the Mute/Operate Switch (G) in the MUTE position; the output signal is then cut off. To resume listening place the switch in the OPERATE position. The mono/stereo function is controlled by Mono/Stereo Switch (F).
SFL-1 PLACEMENT FOR PROPER VENTILATION LIMITED FIVE YEAR WARRANTY Allow at least 4” (15 cm) of clear space above the SFL-1 chassis for proper ventilation, making sure the air vent slots in the chassis cover remain unobstructed. Also, be sure that the SFL-1 Preamplifier is placed on a secure, hard, and level surface. Sonic Frontiers, Inc. warrants to the purchaser that each SFL-1 Preamplifier is free of manufacturing defects for a period of five (5) years from the date of purchase.
SFL-1 & SFL-1 SIGNATURE TECHNICAL SPECIFICATIONS Frequency Response (100K load) 2 Hz to 100 kHz ±0.5 dB > 200 kHz -0.3 dB THD & N (@ 1 V output) < 0.1% from 20 Hz to 20 kHz typically < 0.05% @ 1 kHz Gain 20 dB @ 1 kHz Noise 180 uV unweighted (volume control @ 12 o’clock) -85 dB below @ 2 Volt R.M.S. output Intermodulation Distortion < 0.
We at Sonic Frontiers are sure that you will derive many years of listening pleasure with your new SFL-1 Preamplifier. This Owner’s Manual contains important information regarding the operation and care of the SFL-1. Be sure to read this manual carefully and follow these instructions in order to keep it looking, operating and sounding its best.
