Specifications

I D E TACHABLE AC POWER CORD SOCKET
Plug the Detachable Power Cord into this socket (see
Figure 4). The Pre 1 is factory set for the correct oper-
ating voltage for the area in which it is sold (see ship-
ping box for voltage setting). If a different operating
voltage is required, please contact an authorized Sonic
Frontiers or Anthem dealer, distributor or the factory
directly.
J DC POWER SUPPLY UMBILICAL CORD
This cord supplies power to the Pre 1 through connec-
tion to the DC Power Supply Input (K) (see Figure 3).
THIS CORD IS NOT DETACHABLE FROM THE POWER
SUPPLY.
K DC POWER SUPPLY INPUT SOCKET
This connector accepts a connection from the DC
Power Supply Cord (J).
L MAIN OUTPUTS ONE AND TWO
These outputs connect to the single-ended inputs of
other units such as power amplifiers or a crossover
unit; connect left channel to left channel and right
channel to right channel. The set of two allows for
easier biamping and greater flexibility when dealing
with components such as electronic crossovers, pow-
ered subwoofer, etc.
M TAPE/EPL(EXTERNAL PROCESSOR LOOP) OUTPUT
This output connects to the single-ended inputs of a
tape deck or external processor; connect left channel
to left channel right channel to right channel. This out-
put always follows the input selection of the Selector
Switch (A).
N LINE LEVEL INPUTS FOR CD, TUNER
AND AUXILIARY SOURCE
Line level single-ended source connection may be
made to these 3 sets of RCA connectors; connect left
channel to left channel right channel to right channel.
O TAPE/EPL INPUT
This input accepts a single-ended RCA input connec-
tion from a tape deck or external processor;connect
left channel to left channel right channel to right chan-
nel. These inputs are activated when the Tape/EPL-
Source button (D) is depressed.
P PHONO INPUT AND GROUND CONNECTION
This input provides additional gain when dealing with
sensitive signals from phono cartridges. Connections
are made from a turntable; left channel to left channel
right channel to right channel. The turntable’s ground
wire should connect to the ground post at the centre
of the RCA inputs to prevent any “hum” from interfer-
ing with the signal. See the “Setting up” section for fur-
ther clarification regarding MM and MC cartridges.
DO NOT CONNECT A LINE LEVEL SOURCE TO THE
PHONO INPUT. DOING SO WILL OVERLOAD AND
DESTROY THE SENSITIVE CIRCUITRY.
SPECIAL NOTE: The Main (Line Level) Outputs 1 and 2
(L) of the Pre 1 are a reversed polarity of the Phono
(P) or Line Level Inputs (N). Therefore, you may want
to reverse your speaker wiring polarity to ensure signal
polarity alignment.
C O N N E C T I O N F U N C T I O N S