Anthem Audio Pre 1P Operating Manual - page 3
C
D E TACHABLE IEC AC POW ER CORD S OCKE T
Plug the Detachable Power Cord into this socket (see
Figure 4). The Pre 1P 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 operat-
ing voltage is required, please contact an authorized
Sonic Frontiers or Anthem dealer, distributor or the
factory directly.
D
O U T P U T S
These outputs connect to the unbalanced line level
inputs of other units such as preamplifiers, integrated
amplifiers or receivers; connect left channel to left
channel and right channel to right channel.
E
INPUT S
The low level left and right channel outputs from your
turntable connect to the corresponding left and right
RCA jacks.
F
GR OUND POST
Connect the grounding wire of your turntable to this
grounding post.
F
C
E
D
S E T T I N G
U P
The Pre 1P comes with four tubes, as follows:
2-69 22/6DJ 8 ( V1, V3) AND 2 1 2AT7/ ECC81 (V2 , V4)
These tubes were chosen for their reliability and extremely
low noise. The amplifier topology used in the Pre 1P deliv-
ers exceptional performance using the factory selected
low noise tubes, heightening dynamics and providing a
natural tonal balance.
I NSERTION OF THE TU BE S
1. Using the screwdriver supplied, remove the cover of
the Pre 1P. For your convenience, only four of the screws
are installed at the factory.
2. When handling the tubes, it is recommended that the
cotton gloves provided be worn to prevent skin oils from
depositing on the glass surface.
3. Noting the location of the tube sockets in the top view
photo (Figure 2) or directly on the Printed Circuit Board,
inspect the tubes for corresponding labels and markings.
Once locations are mapped, take a tube and inspect the
pins, noting the larger space between two of the pins
(see Figure 1). This space will match with the socket.
Insert each tube into the appropriate tube socket, mak-
ing sure all pins and pin holes are aligned. Do not force
the tubes into the sockets. “Rock” the tubes gently while
pushing slowly until each tube is firmly seated.
WARNING- DISCONNECT THE AC
DETACHABLE POWER CORD FROM THE
Pre 1P AND WAIT 5 MINUTES BEFORE
REMOVING COVER, TUBES OR FUSE.
Note the larger space
between two of the pins and
holes for proper alignment
of tube and socket.
Figure 1
F U S E
L O C AT I O N
V2
V4
V1
V3
Figure 2 - Tube and Fuse Location