Mesa/Boogie Mark IV Amplifier manual Front Panel

FRONT PANEL:

First familiarize yourself with the layout of the Front Panel and plug in the FU-3 footswitch which is located on the underside of the chassis towards the middle and about mid way forward of the Rear Panel. It’s not necessary to unplug the footswitch after use, simply use the handy fasteners on the left and right side of the cabinet and attach the unit for storage and/or transport. Make sure the footswitch cable is connected properly. It has three pins and a key way for mating itself to the female portion of the jack. When connected, the FU-3 footswitch will allow you to select the various modes,FX Loop and the EQ of the MARK IV remotely. If you don’t have the footswitch available, the MODE SELECT rotary switch located on the Rear Panel will access the modes. Before we get too specific about each control, let’s audition the 3 modes with some basic settings just to get your new MK IV up and purring.

POWER-UP:

Connect your favorite guitar to the instrument input jack. Flip the power switch to the FULL POWER position while leaving the STANDBY switch set to “STANDBY.” ( It is always a good idea to practice this start up procedure as at least 30 seconds of warm-up time lessens the shock on cold power tubes, thus prolonging their life substantially.) Using the example below as a guide, set the controls as illustrated and flip the STANDBY switch to the “ON” position. Listen to the three distinctly different modes using either the footswitch or the MODE SELECT rotary switch as mentioned in the previous paragraph.

RHY 1 pull	RHY 2 pull		Pull Shifts for
			R2, Lead Out	Pull
BRIGHT out		FAT out

		6		5		PULLBRIGHT			10						FATPULL			5	4				2		1			9	8		7				9	8		7		PRESENCE	CONTROLS		4		SHIFTPULL			4			SHIFTPULL		3	2							SILENT				EQ	LOOP
	7											9				76						3																				5	3			5			3			4
8				4				0											3						0		10				6			10				6					2						2						1						RECORDING
													8									4																				6				6						5				0
9				3			1							7		8					2					10						5							5					1						1											(PULL)
							2						6							1		5					0							0								7				7						6				10										FULL
10				2			3									9			0			6			8	9		1		3		4			1		3		4			8	10	0		8		10		0		7		9											ON
	0		1					4		5							10						7						2							2						9				9							8								4	3	2			POWER
																																																															1
RHY1 GAIN							RHY2 GAIN									R1 TREBLE						R1+R2 BASS					R1+R2 MID							R2 TREBLE								R1				R2						LD									5			0
							LEAD GAIN									LEAD TREBLE						LEAD BASS					LEAD MID							LEAD DRIVE																											6			10
																																																													7
	INPUT				INSTRUMENT				8									5						4					5							6				BRIGHTPULL			4				3						3									8	9
								9			7				FATPULL				4			5									4				7			5			MASTERS								2						2											TWEED
							10					6				7	6		3			6			2		7	6			3			8				4				5	2			4			1			4			1
																										1																6				5				0		5				0					OUTPUT LEVEL				STANDBY	POWER
													5								2												2	9					3					1
							0									8				1		7				0	8					1										7				6				10		6				10	80	240	750	2200	6600
								1	2	3			4			9			0			8		10			9			0				10				2				8	10	0		7						7										MARK IV
																	10					9						10							0		1					9					8		9				8		9

LEAD GAIN	LEAD DRIVE
Pull FAT out	Pull BRIGHT out

In the example above the Graphic E.Q. is set in the ever so popular “V” curve shape. Most players tend to use it more in the LEAD channel, finding the RHYTHM channel plenty sweet by itself without the use of the E.Q. ( for more information regarding the E.Q., see page 6 .)

And now looking to the Rear Panel...

FUSE

3A SB

117VOLTS 60 HZ

4 AMPS

REVERB FTSW. FX LOOP ON

FULL TIME

REVERB	7	3		2	10
	4			1
	5				0
	6
		8	9

FX LOOP

SWITCHING

GRAPHICEQ	SATELLITE	PATH	LEFT
OFF		SATELLITE EQ	(STEREO)
		SIG.
ON / OFF AUTO R2			RETURN
REMOTE	SATELLITE SEND

AUTO		AUTO
RHY 1	RHY 2
RHY 2		LEAD

AUTO ASSIGN SWITCHES

RIGHT

(MONO)

FX SEND

RETURN

RECORDING

(D.I.) SLAVE

						TRIODE	SIMUL-CLASS	HARMONICS
5		3		2	0	AMP		VOICING
4				1		POWER
7		8		9	10			LEAD
6
						PENTODE	CLASS A	MID GAIN
LEVEL						OUT
6		3	2			SPEAKERS
4				1
5				0
7	8		9		10	8 OHM	4 OHM	4 OHM

	RHY 2
RHY 1	LEAD
FT SW	EX SW

MODE SELECT

HANDBUILT IN PETALUMA CALIFORNIA

CLASS A/ SIMUL FX LOOP EQ

EXTERNAL SWITCHING JACKS

RHYTHM 1 RHYTHM 2 LEAD

Viewing from the back of the amp, locate the REVERB control and set to 3. Set E.Q. switch to the center position (OFF). LEAD VOICING switch should be set to HARMONICS and ignore the FX Loop for now. Set the power amp switches to SIMUL-CLASS and

TRIODE.

After these initial settings have been made, plug in your guitar (STANDBY switch “ON’) and play! Use the three MASTER controls to balance volumes between the modes. Use the OUTPUT LEVEL to raise or lower overall playing loudness. Dial in the PRESENCE controls to set brightness before adjusting TREBLE controls. RHYTHM 1 should be clean, fat, warm and round. RHYTHM 2 should be near maximum crunch, yet it’s capable of many other sounds as well. The LEAD mode should have searing sustain even though its GAIN control is only around half. Now lets get into understanding the controls and the way they interact to obtain the sounds you want to hear.

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