Mesa/Boogie Rectifier BADLANDER EL84/25 Owner'S Manual Download Page 4

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IMPORTANT SAFETY INSTRUCTIONS

1.  Before attempting to use this apparatus, read and follow these instructions for proper use.

2.  Keep these instructions.

3.  Heed all warnings.

4.  Do not use this apparatus near water.

5.  Clean only with a dry cloth, do not use any solvent such as benzene, naphtha or paint thinner on apparatus.

6.  Do not block any ventilation openings. Install in accordance with manufacturer’s instructions.

7.  Do not install near any heat sources such as radiators, heat registers, stoves or other apparatus (including other amplifiers) that 

produce heat. Avoid placing the apparatus in direct sunlight.

8.  Do not defeat the safety purpose of the polarized or grounding type plug. A polarized plug has two blades with one wider than the 

other. A grounding type plug has two blades and a third grounding prong (protective earth connection). The wide blade or third 

prong is provided for your safety. If the provided does not fit your outlet, consult an electrician for replacement of obsolete outlets.

9.  Be sure that the amplifier’s rated power supply voltage and frequency matches the voltage and frequency of your power source 

BEFORE connecting amplifier to the power source. The amplifier’s rated power supply voltage and frequency are clearly indicated 

on the back panel near the power inlet, and the power cord’s plug should match the power source in your region.

10.  Protect the power cord from being walked on, pinched, or from excessive stress, particularly at the plug and attachment point of 

the apparatus.

11.  Only use attachments and/or accessories specified by the manufacturer.

12.  Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way, such 

as the power plug or cord is damaged, liquid has been spilled or objects have fallen into the apparatus, the apparatus has been 

exposed to rain or moisture, does not operate normally or has been dropped.

13.  To ensure proper ventilation, ensure that there is a minimum of 4” (10cm) of space at the rear of the apparatus. The ventilation 

should not be impeded by covering the ventilation openings with items such as newspapers, cloth, tapestries, curtains, etc. Do not 

impede ventilation by placing objects on top of the apparatus which extend past the rear edge of the cabinet.

14.  No naked flame sources, such as lighted candles or oil lamps, shall be placed on the apparatus.

15.  The apparatus shall not be exposed to dripping or splashing, and insure that no objects filled with liquids, such as vases or 

beverages, are placed on the apparatus.

16.  The AC plug is the mains disconnect, the plug shall remain accessible after installation.

17.  WARNING: To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture.

18.  WARNING: Do not defeat the safety grounding pin on the power cable, it is there for your safety.

19.  WARNING: Do not open or perform any internal modifications on this apparatus.

20.  WARNING: Do not attempt to repair the apparatus, or replace parts within it (except where this manual provides specific instructions 

directing you to do so). Refer all servicing to your retailer, the nearest authorized Mesa Boogie Service Center, or authorized Mesa 

Boogie distributor in your region.

21.  WARNING: Always disconnect the apparatus from the power source before changing fuses, tubes or removing the chassis for 

service. Use only the same type and rating as specified on the back of the apparatus when replacing a fuse.

22.  WARNING: Disconnect apparatus from the power source during a lightning storm or when unused for long periods of time.

23.  WARNING: This apparatus is heavy. Insure that the apparatus remains stable after installation.

24.  WARNING: In areas where children may be present, use additional precautions as needed to protect the children from the hazards 

presented by the unit. This includes risk of electric shock, burns and toppling over.

25.  CAUTION: This apparatus contains hot components and surfaces. Avoid direct contact with heated tubes and other components. 

Insure that any factory installed guards remain installed.

26.  CAUTION: Avoid contact with moving fan blades that may be present within the apparatus or cabinet.

27.  CAUTION: tube envelopes are glass and can present a hazard if broken. Always turn apparatus off, disconnect from the power 

source, and allow to cool before changing tubes.

28.  CAUTION: To avoid damaging your speakers and other equipment, turn off the power of this and all connected equipment before 

making or changing connections. power apparatus up with the volume levels set to minimum, and slowly increase to desired level.

29.  CAUTION: Always insure that the proper speaker load is connected to the apparatus before operating the apparatus. Failure to 

do so may cause damage to the apparatus.

30.  CAUTION: Do not use excessive force when handling cords, jacks, buttons, switches and controls. Never unplug the apparatus 

from the power source by pulling on the wire, use the plug body.

31.  CAUTION: This apparatus, in combination with speakers and/or headphones, may be capable of producing sound levels that 

could cause permanent hearing loss. Do not operate for a long period of time at high levels, or at a level that is uncomfortable, 

without hearing protection. If you experience any hearing loss or ringing in the ears, you should immediately stop using the 

apparatus and consult an audiologist.

[rev. 12/18/2020]

Summary of Contents for Rectifier BADLANDER EL84/25

Page 1: ...Owner s Manual M ESA BADLANDER EL84 25...

Page 2: ...like you Our 50 year commitment to excellence along with our solemn promise to musicians to treat each of them as we ourselves would wish to be treated guarantees you an experience that will make you...

Page 3: ...TER 10 MULTI WATT POWER 11 POWER AC 11 COLD START PROCEDURE 12 STANDBY 12 STANDBY Tube Issues Troubleshooting 12 REAR PANEL 13 SPEAKER OUTPUTS 13 CABCLONE IR DIRECT INTERFACE SECTION 14 MANIPULATING S...

Page 4: ...nnect the plug shall remain accessible after installation 17 WARNING To reduce the risk of fire or electric shock do not expose this apparatus to rain or moisture 18 WARNING Do not defeat the safety g...

Page 5: ...ubject to the following two conditions This device may not cause harmful interference This device must accept any interference received including interference that cause undesired operation Suppliers...

Page 6: ...els allowing for multiple ways to get your gain signatures done be they similar or differing for your two footswitchable sounds PAGE 3 FRONT VIEW BADLANDER 25 REAR VIEW BADLANDER 25 120 V 60 Hz 1 25 A...

Page 7: ...ESA amplifier to feature such comprehen sive convenient and inspiring DI performance With the Badlander s vast preamp versatility power options and the fact you can record or perform silently and safe...

Page 8: ...d CRUNCH Modes but we encourage you to explore the less extreme gain ranges in the Modes as well for that is where some of the most expressive dynamic and character rich sounds reside Use the MID cont...

Page 9: ...Effects Loop is buffered and in theory should be somewhat impervious to Tonal thievery your entire signal will be subjected to whatever the lowest common denominator is in your signal path so take not...

Page 10: ...ller fatter sound will emerge until eventually it will be very fat and compressed and possibly even a little slower feeling along with the added drive and sustain Another handy and reasonable approach...

Page 11: ...ial to a rich and balanced sound in all three of the Modes Setting the TREBLE with care and taste in mind is also critical for the Tone control string to work in harmony In all three Modes the middle...

Page 12: ...ounts of BASS can be applied with very little worry as to detrimental effects Fullness and body warmth and girth are its benefits as the control is increased past 11 00 with most players finding all t...

Page 13: ...TREBLE and or PRESENCE set high will be WAY differ ent and less punishing than what hits the mic s diaphragm and the audience s heads and ears NOTE In the name of great and balanced Tone we d like to...

Page 14: ...The lower position on the toggle provides a low power setting in which the two power tubes run in Triode wiring and produce approximately 10 watts of power Each of these power settings has its own ton...

Page 15: ...ure to use the Cold Start Procedure listed under the POWER instructions above when you return and want to power back up and use the amplifier again NOTE The following information is also found in the...

Page 16: ...f any of the tubes you have remedied the issues and are ready to play If you see a flash or the center of the tube glowing bright red in the center of the metal inside the glass repeat the steps in th...

Page 17: ...he great sounding great feeling built in Reactive Load that allows integration of the power section and all its character with no speaker cabinet connected The feature is a welcome addition for anyone...

Page 18: ...12 THIELE Celestion C90 MESA Proprietary 8 Ohm 6 2x12 LONE STAR Celestion C90 MESA Proprietary 16 Ohm 7 1x12 LONE STAR 23 Celestion C90 MESA Proprietary 8 Ohm 8 1x12 CALIFORNIA TWEED 23 Jensen 100w Al...

Page 19: ...ds with a virtual Cab IR that will not just broadcast them but rather showcase them USB This standard USB port accepts a 2 0 A to B cable not included and is provided for connecting to a computer for...

Page 20: ...ead and features are at an all time pinnacle it is the sound and feel for which you ve likely chosen your pure analog all tube amplifier Therefore we recommend a similar degree of discretion when it c...

Page 21: ...PLAYER NOTES AND REMINDERS PAGE 18...

Page 22: ...fuse with same type rating only Do not expose to rain or moisture CAUTION Risk of Electric Shock Do Not Open No user serviceable parts inside TUBE GUIDE 5 x 12AX7 2 x EL84 EL 84 TUBE POWER EL84 25 C R...

Page 23: ...TION Risk of Electric Shock Do Not Open No user serviceable parts inside TUBE GUIDE 5 x 12AX7 2 x EL84 EL 84 TUBE POWER EL84 25 C R U N C H CLEAN CRUSH C R U N C H CLEAN CRUSH M ESA BADLANDER WARNING...

Page 24: ...worth and it s faster and easier to merely replace the small pre amp tubes ONE AT A TIME with a replacement known to be good But MAKE SURE you keep returning the tubes to their original socket until y...

Page 25: ...of these problems but diagnosis and remedy is usually simple If a fuse blows the problem is most likely a shorted power tube and shorts can either be mild or severe In a mildly shorted tube the electr...

Page 26: ...send you the appropriate match SPEAKER IMPEDANCE MATCHING HOOK UP GUIDE IMPEDANCE Wiring up speakers to provide the most effective load and making sure that all of them are in phase will help in crea...

Page 27: ...t is really not suggested to wire different resistive load values in Parallel 8 and 4 16 and 8 etc The formula for figuring the total impedance in Parallel is the multiplication of the two loads divid...

Page 28: ...to figure out the loads and how to wire them up without applying too low of a resistance on the amplifier Simply connect the Positive side of Speaker A to the Positive side of Speaker C Connect the Ne...

Page 29: ...8 OHM 4 OHM 4 OHM SPEAKERS 8 OHM 4 OHM 4 OHM SPEAKERS 8 OHM 4 OHM 4 OHM SPEAKERS WIRING SCHEMES Amplifier to Speaker Cabinets 8 Ohm Cabinet 8 Ohm Cabinet SAFE MISMATCH 16 Ohm Cabinet SAFE MISMATCH 4 O...

Page 30: ...WIRING SCHEMES Amplifier to Speaker Cabinets 8 Ohm Cabinet 8 Ohm Cabinet 5 8 OHM 4 OHM 4 OHM SPEAKERS PAGE 27...

Page 31: ...PLAYER NOTES AND REMINDERS PAGE 28...

Page 32: ...GAIN STAGE CRUNCH MODE 4TH GAIN STAGE CRUSH MODE BEFORE CHANGING TUBES FLIP POWER STANDBY SWITCH TO OFF INPUT JACK TO MAINTAIN WARRANTY USE MESA BOOGIE TUBES WHEN REPLACEMENT IS NECESSARY FOR CUSTOME...

Page 33: ...Part 497834 Badlander 25 Head INK COLOR SILVER 9 1 2022 12 48PM REV 6 MD WARNING Replace fuse with same type rating only Do not expose to rain or moisture CAUTION Risk of Electric Shock Do Not Open N...

Page 34: ...list is not available when you call helping other customers PLEASE leave a voice message with a phone number and a good time to call and WE LL CALL YOU BACK INTERNATIONAL Customer Support For warranty...

Page 35: ...Thank you for trusting MESA Boogie to be your amplifier company and we wish you many years of toneful enjoyment from this handcrafted instrument...

Page 36: ...22 09 12 1317 Ross Street Petaluma CA 94954 USA 707 778 6565 www mesaboogie com...

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