Effects Loop Section, Recording OUT | Mesa/Boogie Mark IV Amplifier

REAR VIEW MKIV (Continued)

EFFECTS LOOP SECTION: (Continued)

be able to footswitch in the effects mid-way through a LEAD mode solo, for example. Remember that the MASTERS double as effects send controls and the OUTPUT LEVEL also works as an Effects Return control.

RECORDING OUT:

Following the enormous success of this feature in the Quad and Studio Preamps, where they’ve been used on numerous professional

- and countless home recordings, this proven recording circuitry has been included into your new MARK IV. This recording circuit
															can be used while performing live or silently at all hours of the night. Do not unplug the
															speaker when you wish to record silently - merely use the SILENT RECORDING pull switch
	FX LOOP ON			AUTO		AUTO

								2			109				(located on the amplifiers Front Panel).
	FULL TIME			RHY 1		RHY 2	RECORDING	2	0		109				(located on the amplifiers Front Panel).
							RECORDING	1	0
								3					8
								4				7	8
								5	6			7
								5	6
	SWITCHING		AUTO ASSIGN SWITCHES												Even though the RECORDING OUT has its own LEVEL control, the amount of signal available
	FX LOOP			RHY 2		LEAD
								LEVEL						OUT
		LEFT				RIGHT		LEVEL						OUT	is determined by the MASTERS and the OUTPUT LEVEL control. You’ll find that the RE-
	(STEREO)					(MONO)	(D.I.)
							(D.I.)					2
								5	43						CORDING OUT does a pretty remarkable job of simulating the complex functions of power
								8					0
							SLAVE	6					1
								7					1
			FX SEND					9		10					amp, speakers and microphone while at the same time in very little need of any EQ’ing.
			FX SEND					9
	RETURN				RETURN

Notice also that the presence controls are inactive in the recording process, as they are part of the power amp section. The built-in EQ works well for adjusting tonal nuances when recording and your mixing board’s EQ may also be helpful, though not much of either is needed. Finally, you may use the RECORDING OUT for driving the p.a. directly. For stereo recording, connect the RECORDING OUT to your stereo effect, then connect the left and right outputs of the effect into separate channels of the recording mixer.

SLAVE OUT (D.I.):

This is a traditional Boogie feature that offers an adjustable-level signal for driving external slave power amplifiers. Here the signal is derived from the speaker terminal, so a speaker (or load resistor) must be connected at all times! The D.I. can also be used as a feed to a p.a. but quite a lot of EQ’ing will be needed at the board. For much better results, use

FX LOOP ON

AUTO

RECORDING

the RECORDING OUT when feeding a p.a. board.

FULL TIME

RHY 1

RHY 2

A final use for the SLAVE is to drive a string of effects. This is a complex set-up requiring

FX LOOP

RHY 2

LEAD

another power amp (stereo) and two, or better yet three speaker cabs. In this hook-up the

SWITCHING

AUTO ASSIGN SWITCHES

LEVEL

OUT

LEFT

RIGHT

entire MARK IV functions as a tone-generating preamp, with the output taken from the

(STEREO)

(MONO)

(D.I.)

SLAVE D.I. and fed into the effects string. The output of the last effect is then used to drive a

SLAVE

FX SEND

stereo power amp - such as our 50/50 Stereo or Stereo Simul-Class Two Ninety power

RETURN

amps - which in turn would power a pair of speakers.

Remember, the speaker jack of the MARK IV must be loaded by either a power-soak type resistor (which alters the tone badly) or an actual speaker. This “middle” speaker will provide a dry or un-effected sound and is sometimes just a single 12 hidden under the stage.

NOTE: Once signal is taken from the SLAVE D.I. Output, it cannot be inserted back into the MARK IV as a feedback loop will be created resulting in a terrible squeal. Think of the SLAVE as a one way send.

TRIODE / PENTODE SWITCH:

This switch reconfigures the circuitry for the two outer-end power tubes. PENTODE increases power and punch, and results in a harder clip. Use this setting for loud, live applications such as un-mic’ed blues or country gigs.

POWER AMP

TRIODE SIMUL-CLASS HARMONICS

VOICING

LEAD

PENTODE CLASS A

MID GAIN

TRIODE lowers the power and softens and smooths the onset of clip. This makes it easier to get a rich singing sound full of sustain and harmonics, but some headroom is sacrificed for this sweeter response.

PAGE 11

Mesa/Boogie Mark IV Amplifier manual Effects Loop Section, Recording OUT, Slave OUT D.I

Models: Mark IV Amplifier

EFFECTS LOOP SECTION: (Continued)

RECORDING OUT:

(located on the amplifiers Front Panel).

SLAVE OUT (D.I.):

the RECORDING OUT when feeding a p.a. board.

TRIODE / PENTODE SWITCH:

Mark IV Amplifier specifications