Sonic Frontiers SFL-1, SFL-1 Signature Owners manual
OWNER’S MANU A L
THE SONIC FR O NT I ERS S FL-1 & SFL-1 S IG N A T U R E P R E A MPLIFIER
OPERATION, CONNECTIONS AND CONTROL FUNCTIONS
A B C D F G H I
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 D I R E C T position, this
toggle switch selects the Direct Input (O) from a preferred
source, allowing the source signal to bypass all unnecessary
control functions. The signal is only affected by the Mute (G),
the Volume Control (H), and the gain stage of the SFL-1. When
in the N O R M A L position, all regular functions are in use and
the source is chosen through use of the Selector Switch (A).
C - Tape/Source Switch - When in the SO U R C E position, this
toggle switch routes the signal from the Inputs (P) through (S) as selected by the Selector Switch (A) - to the Tape Outputs (M).
Recording is only possible when the toggle is in the SOURCE
position. In the TAPE position, only the Tape Input jacks (N) are
operational, and the tape is then handled as a selected source.
D
-Balance Control - This knob controls the relative balance of
the left and right channels to compensate for any discrepancies
caused by speaker placement, source imbalance, etc. The
Balance Control is bypassed when the SFL-1 is in the Direct
mode as selected by the Direct/Normal Switch (B).
E - Power Indicator LED -
This LED lights when the Preamplifier
is receiving power from an AC source. It will flash at one second intervals during warmup delay and muting. After a 45
second warmup delay, the LED glows steadily green, the relay
circuit is no longer muted, and the preamplifier is ready for
o p e r a t i o n .
F - Mono/Stereo Switch - When in the MO N O position, this
switch combines the left and right signals to produce a mono
signal, which is useful for system troubleshooting when problems are suspected. When in the STEREO position, normal left
and right channel signals are processed.
E
G - Mute/Operate Switch - When in the M U T E position, this
toggle switch cuts off the signal to the SFL-1 Outputs (L), muting
the system (the LED (E) flashes as a reminder). When in the
O P E R A T E mode, the Outputs (L) are electrically connected,
allowing the signal to be passed to the next component (i.e.
a power amplifier or electronic crossover).
H - Volume Control - This knob allows variable control over the
SFL-1 output level. Turn it clockwise to increase the volume.
I - Power Switch - When in the ON position, this switch
allows the SFL-1 to receive power, rendering the SFL-1 operational, as indicated by the Power Indicator LED (E). When in
the OFF position, the SFL-1 is not receiving power and is not
o p e r a t i o n a l .
Back view of the Signature version with Kimber jacks.
J K M N O P Q R SL
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. The fuse may be
accessed with a small flat-bladed screwdriver by turning the
fuse cap a 1/2 turn counterclockwise to unlock a spring that
ejects the fuse holder out. The unit is factory installed with
“fast-blo” .5 Amp 250V (0.25” x 1.25”) for 100-120V use
or .25 Amp 250V (0.25” x 1.25”) for 200-240V use.
L - Sets 1 & 2 of Left and Right RCA S i n g l e - E n d e d
Main Outputs - These outputs should be used when con-
necting to the single-ended RCA inputs on other units, such as
a power amplifier or crossover unit; connect left channel to left
channel and right channel to right channel. The two sets of outputs allow for easier biamping and greater flexibility over a single set of output jacks when dealing with components such as
electronic crossovers, powered subwoofers, etc.
M
-Left and Right RCA Single-Ended Tape Output - This
output connects to the single-ended RCA input of a tape deck;
left channel to left channel and right channel to right channel.
These outputs are not operational when the Direct/Normal
Switch (B) is in the DIRECT mode, or when the Tape/Source
Switch (C) is in the TAPE mode.
N
-Left and Right RCA Single-Ended Tape Input - This
input accepts a single-ended RCA input connection from a
tape source; left channel to left channel and right channel to
right channel.
O
-Left and Right RCA Single-Ended Direct Input - This
input accepts a single-ended RCA input connection from a preferred line level source to achieve the highest possible sonic performance, bypassing unnecessary control functions; left channel to left
channel and right channel to right channel. This input is selected by
placing the Direct/Normal Switch (B) in the DIRECT position.
P - Left and Right RCA Single-Ended Auxiliary 2 Input
- This input accepts a single-ended RCA input connection from
any line level signal source; left channel to left channel and
right channel to right channel. It is selected via the Source
Selector Switch (A).
Q
-Left and Right RCA Single-Ended Auxiliary 1 Input
- This input accepts a single-ended RCA input connection from
any line level signal source; left channel to left channel and
right channel to right channel. It is selected via the Source
Selector Switch (A).
R - Left and Right RCA Single-Ended Tuner Input - This
input accepts a single-ended RCA connection from a tuner
source; left channel to left channel and right channel to right
channel. It is selected via the Source Selector Switch (A).
S - Left and Right RCA Single-Ended CD Input - This
input accepts a single-ended RCA connection from a Compact
Disc Player or Digital-to-Analogue Converter; left channel to left
channel and right channel to right channel. It is selected via the
Source Selector Switch (A).
Figure 1 - Align socket pins to corresponding holes and push together firmly.
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