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Table of Contents
MARK IV
PRECAUTIONS
OVERVIEW_____________________________ 1
FRONT PANEL:
POWER-UP ____________________________ 2
CONTROLS:
RHYTHM 1 GAIN ________________________ 3
PULL BRIGHT __________________________ 3
R 1 TREBLE ____________________________ 3
R 1 + R 2 BASS and R 1 + R 2 MID _________ 3
R 1 PRESENCE _________________________ 4
R 1 MASTER ___________________________ 3
RHYTHM 2 GAIN & FAT __________________ 4
R 1 + R 2 BASS and R1 + R 2 MID __________ 4
R 2 TREBLE ____________________________ 5
R 2 PRESENCE _________________________ 5
R 2 MASTER ___________________________ 5
SETTING THE LEAD MODE:
LEAD GAIN _________________________ 5 & 6
LEAD TREBLE __________________________ 6
LEAD BASS & LEAD MID _________________ 6
LEAD DRIVE ___________________________ 6
LEAD BRIGHT __________________________ 7
LEAD PRESENCE & LEAD MASTER ________ 7
GRAPHIC EQ ________________________ 7 & 8
OUTPUT LEVEL_________________________ 8
SILENT RECORDING (Pull Switch) _________ 8
STANDBY ______________________________ 8
POWER (Full & Tweed Power) _____________ 8
REAR PANEL:
A.C. RECEPTACLE _______________________ 9
FUSE __________________________________ 9
REVERB & REVERB FOOTSWITCH ________ 10
EQ ROCKER SWITCH ____________________ 10
SATELLITE CONTROL: EQ & SEND JACK __ 10
EFFECTS LOOP SECTION ____________ 10 & 11
RECORDING OUT _______________________ 11
SLAVE OUT (D.I.)________________________ 11
TRIODE & PENTODE SWITCH _____________ 11
SIMUL-CLASS & CLASS A SWITCH ________ 12
HARMONICS & MID GAIN SWITCH _________ 12
POWER TUBE SUBSTITUTION ________ 12 & 13
SPEAKER JACKS _______________________ 13
MODE SELECTOR SWITCH _______________ 13
EXTERNAL SWITCHING JACK ____________ 14
GOING STEREO ________________________ 14
FACTORY SAMPLE SETTINGS ____________ 15
PERSONAL SETTINGS PAGE _____________ 16
TUBE TASK CHART _____________________ 17
TUBE NOISE & MICROPHONICS ___________ 18
DIAGNOSING PRE-AMP TUBES PROBLEMS_ 19
BIAS ADJUSTMENT ______________ 20,21 & 22
PARTS SHEET __________________________ 23
NOTE: Do to the sophistication and advanced
layout of this amplifier, we strongly urge you to
read and understand the workings and how to's
of your new MARK IV...doing so will save time
and increase your enjoyment.