Mesa/Boogie pmn User Manual download pdf (Page 13)

SLAVE OUT:

This 1/4” jack provides a signal derived from the speaker jack. Perfect for using the

RECT-O 50

as a master pre-

amp, or additional power amps may be connected for more power when needed. Some players use this to derive an FX Send Signal

and go to other amps for their wet sound.

NOTE:

Once a signal is taken from the

SLAVE

, it can not be inserted back into the FX Loop Return

SLAVE, it can not be inserted back into the FX Loop Return SLAVE

jack or a feedback loop will occur. Much like holding a microphone into the PA system’s cabinets...a

loud high pitched squeal will occur.

SPEAKERS:

Sensitivity to speaker mismatching in regards to ohmage differences is low, hence no damage to the ampliﬁ er will

occur. However, very low ohmage loads will cause the power tubes to wear faster. The

RECT-O 50

(combo only) is equipped with

a Celestion Custom 90 single 12 inch - 8 Ohm speaker, but as you can see, other speaker

conﬁ gurations may be used.

When using two 8 Ohm speakers, connect each of them to the 4 Ohm speaker jacks that are

provided, this will equal a 4 Ohm load which is the proper impedance required when using

this particular speaker conﬁ guration.

BIAS SELECT:

Your

RECT-O 50

ampliﬁ er was designed with versatility in mind. So to add to the already awesome array of on

board features...we felt it essential that these new

RECT-O 50 Series 2

ampliﬁ ers be able to adapt their power output section 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 identiﬁ able and wonderful sounding amps created in Great Britain

and used on some of the best recordings to date.

The nature of their sound is usually brighter in the extremely high frequencies...some players ﬁ nd this almost

thin at ﬁ rst. However, aﬁ cionados of the EL34 sound know that nothing has the lushness of harmonics or

spread like a power amp using EL34’s. In truth EL34’s do focus in on a region of upper harmonics that 6L6’s

reproduce, but not really enhance, in the same way the EL34’s do.

This characteristic is sometimes preferred for sounds that range from a soft clip that would be used for

PAGE 9

REAR PANEL:

REAR VIEW - HEAD VERSION

10%

FX MIX

RETURN

SEND

WARNING:

Unplug power

before replacing

fuse or removing

bolts mounting

chassis.

POWER FUSE

2.5 A

SLO

BLO

120 V~

50-60 Hz

2.5 A

POWER FUSE

FUSE

CHANNEL

SET TO CHANNEL 1

TO USE FOOTSWITC

PATENTED 4,211,000 & OTHERS PENDING FOR SOLO, MUTE & LOOP CONFIGURATION

FOOT

SWITCH

SOLO CHANNEL

EXT. SWITCHING

4 OHM

8 OHM

SPEAKERS

WARNING

To reduce risk of fire or

electric shock, replace fuse with

same type and rating only. Do not

expose this unit to rain or moisture.

CAUTION

To reduce risk of fire or electric

shock, do not remove cover. No user-

serviceable parts inside. Refer

servicing to qualified personnel.

FX LOOP

CAUTION

SWITCH MUST MATCH

TUBES IN USE

EL34

BIAS SWITCH

6L6

ALL TUBE AMPLIFIER HANDMADE IN PETALUMA, CALIF USA

SINGLE RECTIFIER SERIES 2 SOLO HEAD

OUT

SLAVE

(TO EXT. PWR AMP)

4 OHM

4 O

SPE

ALL TUBE AMPLIFIER HANDMADE IN PETA

SINGLE RECTIFIER SERIES 2

OUT

SLAVE

(TO EXT. PWR AMP)

HEAD VERSION

4 OHM

8 OHM

SPEAKERS

ALL TUBE AMPLIFIER HANDMADE IN PETALUMA, CALIF USA

SINGLE RECTIFIER SERIES 2 SOLO HEAD

OUT

SLAVE

(TO EXT. PWR AMP)

CAUTION

SWITCH MUST MATCH

TUBES IN USE

EL34

BIAS SWITCH

6L6

1 2 ... 8 9 10 11 12 13 14 15 16 17 18 ... 37 38

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Mesa/Boogie pmn User Manual Page 13

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