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Mesa/Boogie Express series, Owner'S Manual, Page: 27 / 38

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Mesa/Boogie Express series Owner'S Manual Download Page 27

PAGE 23

4 OHM

4 OHM

8 OHM

Partial back view of amplifier

8 Ohm   Cabinet

8 Ohm   Cabinet

SERIES BOX

16 Ohm

8 Ohm

8 Ohm

8 Ohm   Cabinet

10

SAFE MISMATCH

12

4 OHM

4 OHM

Partial back view of amplifier

16 Ohm   Cabinet

16 Ohm   Cabinet

11

8 OHM

8 Ohm   Cabinet

16 Ohm   Cabinet

16 Ohm   Cabinet

4 OHM

4 OHM

8 OHM

Partial back view of amp

PARALLEL BOX

8 Ohm

16 Ohm

16 Ohm

 WIRING SCHEMES...Amplifier to Speaker Cabinets

CORRECT MATCH

SAFE MISMATCH

Summary of Contents for Express series

Page 1: ...Owner s Manual...

Page 2: ...Your reward is that you are the new owner of an amp bred of fine all tube heritage benefiting from the many pioneering and patented Mesa circuits that led to the refinement of your new model We feel c...

Page 3: ...openings with items such as newspapers tablecloths curtains etc Do not impede ventilation by placing objects on top of the apparatus which extend past the rear edge of its cabinet No naked flame sour...

Page 4: ...________________________________________________ 8 REAR PANEL CONTROLS SWITCHES JACKS EXTERNAL SWITCHING______________________________________________________________________ 9 EFFECTS LOOP___________...

Page 5: ...a high gain adventure through the searing layers of molten harmonics in BURN Together these two inspiring modes invite years of solo exploration These stylistically opposing modes in the two Channels...

Page 6: ...ring configuration Choose the full power mode of either amp 25W in 5 25 or 50W in 5 50 for Class AB running in a Push Pull configuration for punch authority and headroom Then kick down to the 5 watt m...

Page 7: ...that these are approximate descriptions of the sound and that your own personal playing style guitar pickups and most of all touch will determine how this mode reacts at specific settings CRUNCH This...

Page 8: ...the BLUES mode perfectly not to mention that your roommates will love you for it BURN This is the highest gain of all the modes in your Express and it is BURN that characterizes Channel 2 as the Lead...

Page 9: ...d you are after try looking to the CONTOUR for any added low end enhancement as this circuit comes later in the preamp and is less likely to bloat the sound If the top end enhancement is unwanted redu...

Page 10: ...s set high the effectiveness of the BASS and MID controls is reduced If the TREBLE control is set low these two controls become dominant For the most balanced sound and a balance of power between the...

Page 11: ...l 2 is activated Now let s move to the individual controls and go over how they interact to achieve the sound you re looking for CONTOUR These two sets of 3 position mini toggles and rotary controls m...

Page 12: ...sition switch up the tubes are at idle so that during power up they may warm up before being put to use Before the power is switched on make sure the STANDBY switch is in the STANDBY position Wait at...

Page 13: ...al it is important that you use good quality processors in the middle of your amp While the loop is compatible with most processor Input Output impedance demands there can be a lot of room for sonic c...

Page 14: ...25 with Dyna Watt is one of our most enjoyable circuits to play as it is extremely Expressive and friendly feeling on the strings as well as incredible sounding 5 50 owners check one out sometime 5WA...

Page 15: ...eans go with the Tone NOTE Using impedance mismatches in the low direction i e a 2 Ohm load on the 4 Ohm output will cause the power tubes to wear a bit faster COMBO Express combos use either one inte...

Page 16: ...PAGE 12 FACTORY SAMPLE SETTINGS Roots Clean Texas Lead Pushed Clean Thick Crunch Alternative Clean Huge Crunch Spankin Clean Vocal Lead Tight Crunch Soaring Lead...

Page 17: ...PAGE 13 PERSONAL SETTINGS...

Page 18: ...start to over heat before the others and thus it can be identified It should be replaced with one from the same color batch shown on its label Call us and we will send one out to you The severe short...

Page 19: ...is because they are at the start of the chain and their noise gets amplified over and over by the tubes that follow The tube that goes into this input socket usually labeled V1 needs to be the least n...

Page 20: ...And most important The bias is RIGHT because it can t change Now you want the long answer Here s more information on how our hard wired bias avoids trouble Please read on But first let s make an impor...

Page 21: ...r an A note If the fluctuations in current flow are large and still at 440 per second you ll hear an A that is LOUD But for purposes of biasing it s the amount of plate current flowing with no signal...

Page 22: ...ges the other Great care goes into getting this just right and we think we d be asking for trouble to have it adjustable for the world to play with unless you like paying to have your amp messed up So...

Page 23: ...xample 8 ohm output into 16 ohm cabinet a slightly different feel and response will be eminent A slight mismatch can provide a darker smoother tone with a little less output and attack This response i...

Page 24: ...w you maintain a consistent load with multiple speakers The importance of this is more evident when you have more than one cabinet to connect to your amplifier This is when you need to figure out the...

Page 25: ...CHEMES Amplifier to Speaker Cabinets 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet 4 OHM 8 OHM 16 OHM Partial back view of amplifier 16 Ohm Cabinet SAFE MISMATCH 8 OHM 4 OHM 4 OHM P...

Page 26: ...ack view of amplifier SAFE MISMATCH 8 OHM Partial back view of amplifier SERIES BOX 8 Ohm 4 Ohm 4 Ohm 4 Ohm Cabinet 4 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view of amplifier PARALLEL BOX 8 Ohm 16...

Page 27: ...hm 8 Ohm Cabinet 10 SAFE MISMATCH 12 4 OHM 4 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabinet 11 8 OHM 8 Ohm Cabinet 16 Ohm Cabinet 16 Ohm Cabinet 4 OHM 4 OHM 8 OHM Partial back view o...

Page 28: ...et 8 Ohm Cabinet SERIES BOX 16 Ohm 8 Ohm 8 Ohm 16 Ohm Cabinet 13 SAFE MISMATCH WIRING SCHEMES Amplifier to Speaker Cabinets 4 OHM 4 OHM 8 OHM Partial back view of amplifier 16 Ohm Cabinet 16 Ohm Cabin...

Page 29: ...epel one another and thus within the electron cloud surrounding the cathode there is much jostling and elbowing as each one tries to maintain his distance from all the others unless there is a strong...

Page 30: ...d spring It can create a repelling field but mostly it s empty space in between widely sepa rated windings of wire It s very easy to control the electrons as they pass through the grid s force field C...

Page 31: ...this and haven t lost track of the count you ll know we re still one element short of the five needed to make a Pentode This last part is a pair of beam confining shields which being negatively charg...

Page 32: ...PAGE 28...

Page 33: ...PAGE 29...

Page 34: ...607231 LED pt 395735 LENS pt 703330 SWITCH pt 607233 LED pt 395438 LENS pt 703330 2 SWITCHES pt 607233 2 SWITCHES pt 600631 LED pt 394251 LED pt 394232 LED pt 394201 LENS pt 703782 BULB pt 703047 HOL...

Page 35: ...3330 LED pt 395735 LENS pt 703330 SWITCH pt 607233 2 SWITCHES pt 607233 LED pt 394251 LENS pt 703782 BULB pt 703047 HOLDER pt 703047 SWITCH pt 607231 2 SWITCHES pt 600631 FRONT PANEL Express 5 50 LED...

Page 36: ...NOTES...

Page 37: ......

Page 38: ...09 14 09...

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