Preamplifier Set-Up - Sonic Frontiers THE LINE SERIES Owner's Manual

P RE A MPL IF IE R S ET -U P
You are now ready to begin setting up your preamplifier.
INSERTION OF THE TUBES
W A R N I N G
DISCONNECT the AC Detachable Power Cord
from the Line 1 Main Chassis or Line 2 & Line 3
Power Supply before removing the Preamplifier
chassis cover.
Please read and follow these instructions carefully. Great care was
taken in the testing, selection and matching of the supplied tubes in
order to ensure proper operation of the unit. Failure to follow these
instructions will cause these preamps to suffer in performance and
sound quality.
The Line 1 and Line 2 are supplied with six 6922 (6DJ8-type)
tubes, while the Line 3 is supplied with ten 6922 (6DJ8-type) tubes
and two 6GH8A tubes individually boxed. The 6GH8A tubes in
the Line 3 must be placed in the locations marked L V 2 and V 1
for the preamp to function.
W A R N I N G
Do not adjust any controls inside any of the pre-
amps - shown in Figures 7,8 and 9. These con-
trols have been factory set for the optimum per-
formance (both sonically and electrically) of the LINE Series
Preamplifier. Do not adjust these controls - doing so will
degrade the performance of the Line Series Preamplifier.
They may only be adjusted using specialized test equipment
that only authorized service depots, distributors or the Sonic
Frontiers factory have for this purpose.
1 . In order to install the tubes, use the supplied Phillips screw driver
and remove the top cover of the main chassis. For your convenience,
only a few screws were installed at the factory to facilitate the easy
removal of the Top Covers.
[Note: The main chassis has the volume control knob, and the LED dis-
play window on it.]
2 . When handling the tubes, it is recommended the cotton gloves
provided be worn to prevent skin oils from depositing on the glass sur-
face. Find the tubes appropriate for your preamplifier, boxed in the
packaging storage compartment.
3 . Inspect the tubes for code markings. They will be coded
individually, each with one of the following codes: LV1 - LV3, and
V1 - V3 (on the Line 1 and Line 2). The tubes for the Line 3 are
labeled LV1 - LV6 and V1 - V6.
4 . Now inspect the printed circuit board (PCB) above the tube sockets
in the Line 1, Line 2 or Line 3 preamplifier for the codes matching the
codes on the tubes (See Figures 7,8 and 9 for further clarification).
6
LV1 V1
LV2 V2
V3
LV3
Figure 7 - Line 1 tube installation locations.
LV1
LV2
LV3
Figure 8 - Line 2 tube installation locations.
LV1 LV2
LV3 LV4
LV5 LV6
Figure 9 - Line 3 tube installation locations.
V1
V2
V3
V1 V2
V3 V4
V5 V6