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even the glass they are encased in, and they return to their "cold" state even after a short time with the power
off. This procedure, when followed religiously, will help prevent tube problems and extend their useful life.
COLD START PROCEDURE
(Use every time amplifier has been switched off for more than 3 minutes)
1.
Switch to STANDBY (STANDBY switch left)
2. Turn POWER to ON (POWER switch right).
3. Wait AT LEAST 30 Seconds, preferably longer, for tubes to warm up.
4. Flip STANDBY to ON (STANDBY switch right)
NOTE: This cold start procedure is an important part of ensuring maximum tube life and reliability. Like a light
bulb, the most wear occurs during the instant voltage is first applied. Like a light bulb, if a dimmer is used to
reduce the voltage for the first few seconds or so of use, increased longevity is the result. The STANDBY is
the amp's equivalent to a dimmer and using it in the above described method will ensure the longest life and
GAIN
best performance from a set of tubes (especially output tubes).
NORMAL
INPUT
That's it for the front panel features and controls, now let's jump to the rear panel.
LOW
REAR PANEL
WARNING:
Unplug power before servicing fuse or chassis
POWER
FUSE
~
120 V
1.25 A
60 Hz
SLO
1.25 A
BLO
FUSE
DUO-CLASS
AMPLIFIER
44YV
POWER OUTLET/AC MAINS SOCKET: (Removable IEC TYPE)
Underneath rear panel: This is the AC MAINS power 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 of shock 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 1.25 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 glowing red hot in the center! Flip the STANDBY switch down immediately and replace the faulty
power tube and the FUSE if necessary.
EFFECTS LOOP (SERIES)
These two ¼" jacks provide the interfacing patch points for your "rear end" processing needs ...things other
than drive pedals, wah, compressors, fuzz, etc., that usually work better on the amplifier's INPUT.
The effects loop is basically a circuit bridge from the end of the preamp to the driver stage in the power section,
TREBLE
MID
CALIFORNIA TWEED
EFFECTS
SEND
RETURN
POWER
™
Risk of Electric Shock. Do Not Open.
No user serviceable parts inside.
BASS
PRESENCE
2:TWENTY
™
VACUUM TUBE
AMPLIFIER
DYNA-WATT™ POWER
REV FTSW
REVERB
(USE SHIELDED CABLE)
CAUTION:
PAGE 14
MASTER
MULTI-WA TT
10W
1W
6 V6
6 V6
™
HAND-WIRED
IN PETALUMA,
CALIFORNIA, USA
SPEAKERS
8 OHM
WARNING:
Replace fuse with same type/rating only.
Do not expose to rain or moisture.
™
ON
20W
POWER
STANDBY
ON
tweed
™
TUBE GUIDE
5 x 12AX7
1 x 12AT7
2 x 6V6
PATENTED
4 OHM
4 OHM
7,173,488
6V6 2:TWENTY
™
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