STANDBY
This large toggle controls the high voltage to the power tubes and from cold start, helps minimize the inrush of current
and reduces the “shock” on them, which ultimately helps increase their useful life. Just like a light bulb, much of the wear
on tubes happens at the instant of power up. Minimizing this shock and allowing them to warm up more slowly ensures
they will give you the longest life possible. Before Power is switched on, make sure the STANDBY switch is in the “0”
(switch down) position. Wait at least 30 seconds and then flip the STANDBY switch to the “I” position. STANDBY is also
very useful as a MUTE for either short interruptions–like changing instruments or patching cables–as well as longer intervals such
as Set Breaks or other extended periods. While you can leave the amplifier in STANDBY mode for hours with no harm, it is probably
wise to power down if you know you won’t be playing for an hour or two. Why waste the electricity? Just remember to follow the Cold
Start procedure mentioned above when you power back up, even if the amp is still “warm”. The filaments in the tubes cool much
more quickly than 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 substantially.
COLD START PROCEDURE:
(Use every time amplifier has been switched off for more than 3 minutes)
1. Flip STANDBY down to “0”.
2. Turn POWER to “I” – ON (switch up).
3. Wait AT LEAST 30 Seconds, preferably longer, for tubes to warm up.
4. Turn STANDBY to “I” – ON (switch up)
Enjoy!
NOTE: This Cold Start Procedure is an important part of ensuring maximum tube life and reliability. Like a light bulb, the most wear
occurs in the instant (short period, first few seconds) voltage is first applied. Like a light bulb, if a dimmer is used to reduce the volt
-age 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 best performance from a set of tubes (especially Output tubes).
REAR PANEL
AC MAINS SOCKET: Underneath Rear Panel (Quick Disconnect Style)
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 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 and
Japanese 100V versions requires a 4 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.
80Hz 240 750 2200 6600 80Hz 240 750 2200 6600
EQ 1
FX
MD
CH 1
FS
MD
EQ 2
2
CH 3
SHRED 2
MD
SRD 2+3
REV
MD/FS
EQ
1
EQ 2
I
O
120 V~
60 Hz
4 A
4 A
SLO
BLO
AMPLIFIER
44YV
FUSE
CH 3 CH 2 CH 1
SLAVE HD. PHONE
REVERB
4 OHM 4 OHM
OUT
SPEAKERS
FX
SPKR
ON
CLOSED
BACK
SPKR
OFF
VINTAGE
MESA
FT.SW.
MIDI
THRU/OUT
100 WATTS
60 WATTS
MIDI
IN
STORE MIDI
CHANNEL
LIFT +4 dB
GROUND -10 dB
8 OHM 16 OHM
RETURN
CabClone
™
D.I.
SEND
TUBE GUIDE
5 x 12AX7
4 x 6L6
CAUTION: Unplug
power before servicing
fuse or chassis
JP-2C™
ALL TUBE MUSIC
AMPLIFIER
PATENTED
6,621,907
USE
w
/2x8Ω
CABS
OPEN
®
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
MADE IN PETALUMA, CA
WITH THE WORLD’S
FINEST MATERIALS
PAGE 17
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