Rear Panel; Ac Mains Socket; Fuse; Effects Loop (Series) - Mesa/Boogie CALIFORNIA TWEED 6V6 4:Forty Owner's Manual

NORMAL
INPUT
LOW

REAR PANEL

WARNING:
Unplug power before
servicing fuse or chassis
POWER

FUSE

~ 2.5 A
120 V
SLO
60 Hz
BLO
2.5 A
FUSE
6V6 4:40
AMPLIFIER
44YV
POWER OUTLET/AC MAINS SOCKET: (Removable IEC TYPE)
Cord Socket. The standardized removable power cable supplied with your amp can only be plugged in one way. Always connect the
male end to a grounded (3-Hole) wall socket with the proper voltage present (117 Volts on U.S.A. Models). To Avoid The Risk Of
Shock, Never Alter The Power Cable in any way. Altering the Power Cable will void your warranty and put you at risk while leaving
your amplifier open to the possibility of damage.
FUSE
This is the A.C.'s (Alternating Current) main fuse and provides protection from outside A.C. fluctuations as well as power tube
failure damage. Should the FUSE blow, replace it with the same rating in a Slo-Blo type package. The Domestic 117V version requires
a 2.5 Amp Slo-Blo fuse. A power tube short or failure is often the cause of a blown fuse. Follow the cold start procedure mentioned in
the STANDBY switch section and watch the power tubes as you flip the STANDBY to the ON position. If a power tube is going bad or
is arcing, you will see it! Flip the STANDBY switch down immediately and replace the faulty power tube and the FUSE if necessary.

EFFECTS LOOP (SERIES)

Effects Loop is basically a circuit bridge from the end of the preamp to the Driver stage, with the SEND interrupting the signal at the
preamp's end and the RETURN feeding the signal back in right before the power section, just before the Driver tube.
Using this patch point usually ensures the best sonic performance as well as signal to noise ratio with your outboard processors.
That said, it is important to point out that this is a critical junction in the California Tweed's circuit path and whatever is inserted here
can have an effect on the overall performance of the amplifier.
The Effects Loop is a Series Loop, meaning that the entire signal goes through it, unlike a Parallel Loop where a percentage of the
unaffected pure signal is taken around the Loop and the loop signal mixed back in later. Therefore, the quality of the devices used in
the Loop and their performance is critical to achieving the best sound and performance from your amplifier. We recommend auditioning
any processor with your amplifier BEFORE buying it to ensure it delivers a good match in performance. One clue to quality is price.
Like in any segment of the marketplace, you get what you pay for most times and there is a wide range of quality in regards to both
build and sonic performance. While technology has raced ahead at a frightening pace and features are at an all time pinnacle, it is
sound and feel you've likely chosen your pure analog all-tube amplifier for, and therefore we recommend a similar degree of discre-
tion when it comes to choosing your processing devices. Ultimately,... what you insert in the middle of your amplifier's signal path
will have a lot to do with how it performs.
To connect your Processors:
1. Connect the SEND to your processor's INPUT
2 Connect the RETURN to your processor's OUTPUT.
Done.
It is always best to use the shortest SHIELDED cable lengths possible. If you intend to run very long cable lengths, use a buffer.
Even though the amplifier's Effects Loop IS buffered, there can be some minimal sonic penalty the longer the cable length becomes.
CALIFORNIA TWEED ™
VACUUM TUBE
AMPLIFIER
EFFECTS
(USE SHIELDED CABLE)
SEND RETURN REV FTSW
CAUTION:
Risk of Electric Shock. Do Not Open.
No user serviceable parts inside.
These two ¼" jacks provide the interfacing patch points for your "rear end" processing needs. The
6 V 6 6 V 6
4:FORTY
HAND-WIRED
IN PETALUMA,
CALIFORNIA, USA
DYNA-WATT™ POWER SPEAKERS
8 OHM 4 OHM
WARNING:
Replace fuse with same type/rating only.
Do not expose to rain or moisture.
Underneath Rear Panel: This is the AC MAINS Power
PAGE 11
20W
10W 30W
2W 40W
™
tweed
4 OHM
DUO-CLASS POWER
™
ON
POWER
STANDBY
ON
™
TUBE GUIDE
5 x 12AX7
1 x 12AT7
4 x 6V6
PATENTED
7,173,488
9,917,560