Mesa/Boogie Rectifier Stereo owner manual Rear Panel Features, Same way the EL34’s do

REAR PANEL FEATURES:

REAR VIEW:			2:100
	WARNING: To reduce risk of fire or			WARNING: To reduce risk of fire or electric
	electric shock, replace fuse with			shock, Do not remove cover. No user-
	same type and rating only. Do not			serviceable parts inside. Refer
	expose this unit to rain or moisture.			servicing to qualified personnel.
I		E N G I N E E R I N G			I
	BIAS			GROUND
N					N
	SWITCH			SWITCH
P NORMAL	6L6	POWER	FUSE	LIFT	NORMAL P
U					U
		120 V~	6 A
T					T
		60 Hz	SLO
S					S
	EL34	6 A	BLO GROUND
	MUST MATCH TUBES			SEE OWNERS BOOK	RECTO INPUTS
RECTO INPUTS
CHAN. B	8 OHM	MODERN			CHAN. A
SPEAKERS				8 OHM SPEAKERS
	4 OHM			4 OHM

USE F

E F

SU

INPUTS: Located on the Rear Panel, these two 1/4Ó jacks are the Channel A and Channel B inputs for the 2:100. These are the inputs for pre-amps and/or effects, depending on how you have your system wired. You may drive the 2:100 with your pre-amp directly or choose to come from the last effect in a chain and drive the power amp this way. Either way is fine and up to your preference. The amplifier is stereo, offering two separate channels of

	WARNING: To reduce risk of fire or					WARNING: To reduce risk of fire or electric			amplification. If you wish to use only one of its channels, it is neces-
	electric shock, replace fuse with					shock, Do not remove cover. No user-			sary to: 1 ) Make sure a speaker (or load resistor) remains con-
	same type and rating only. Do not					serviceable parts inside. Refer
	expose this unit to rain or moisture.					servicing to qualified personnel.
I			E N G I N E E R I N G					I
	BIAS					GROUND			nected to a speaker jack on both channels, including the unused
N								N
	SWITCH					SWITCH
P NORMAL	6L6	POWER		FUSE LIFT			NORMAL P		one; or 2 ) Turn the LEVEL Control of the unused channel to zero.
U								U	(This is necessary because an amplifier channel receiving any amount
		120 V~			6 A
T								T
S		60 Hz			SLO			S	of signal at its input will require a ÒloadÓ at its output - or damage will
	EL34	6 A			BLO GROUND
RECTO INPUTS							RECTO INPUTS
	MUST MATCH TUBES					SEE OWNERS MANUAL			most likely result.)
			MODERN						The RECTO INPUTS are wired such that when the companion Rec-
									tifier Recording Preamp is used, the circuit remains exactly true to

the signal path between preamp and power section as it occurs in the Dual and Triple Rectifier Heads. To achieve this duplication, a driver tube responsible for the effects return stage and all related circuitry in the 2:100 must be removed and this includes the LEVEL Conbtrols as they are part of this circuitry. As a result, when using the RECTO INPUTS, you will use the Recto Pre LIVE OUTPUT Control as your overall final master level control.

TUBE BIAS: Your 2:100 was designed with versatility in mind. The BIAS SWITCH allows you to adapt the power output section of the 2:100 in order to use the other classic pentode power tubes, the British style EL 34. These tubes are largely responsible for the

			signature sound of many immediately identifiable and wonderful sounding amps created in Great Britain
	same type and rating only. Do not		and used on some of the best recordings to date. The nature of their sound is usually brighter in the
	WARNING: To reduce risk of fire or
	electric shock, replace fuse with
	expose this unit to rain or moisture.	E N G I N E	extremely high frequencies...some players find this almost thin at first. However, aficionados of the EL34
I
	BIAS
N			sound know that nothing has the lushness of harmonics or spread like a power amp using EL34’s. In
	SWITCH
P NORMAL	6L6 POWER
U			truth EL34’s do focus in on a region of upper harmonics that 6L6’s reproduce, but not really enhance, in
		120 V~
T
S		60 Hz	the same way the EL34’s do.
	EL34	6 A

RECTO INPUT MUST MATCH TUBES

This characteristic is sometimes preferred for sounds that range from a soft clip that would be used for chording or soloing, to an all out high gain crunch or lead sound. Players that use mostly these types of sounds may prefer the EL34 clip to the 6L6’s that come standard in the 2:100. If you need a variety of sounds and rely on a clean chording sound much of the time, you will likely prefer the stock compliment of 6L6’s that the 2:100 comes fitted with. We feel the 6L6 is a more balanced sounding tube that produces plenty of harmonic lushness, while at the same time delivering the rich lows that are crucial to both a warm clean sound and huge, tight high gain crunch sound.

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