Mesa/Boogie Rectifier BADLANDER EL84/25 Owner'S Manual Download Page 10

CHANNEL SELECT

This switch in the center of the stacked switches allows manual selection of the Channels when the Footswitch 

is not plugged in or available. The Center position labeled FTSW accommodates the Footswitch when plugged 

in to the adjacent FTSW jack and allows remote switching between the Channels via the Footswitch. Make sure 

the switch is in the Center position when using the Footswitch. Otherwise, the switch moved upward selects 

Channel 1, the switch moved downward activates Channel 2. 
MODE SELECT

These mini toggles above and below the Channel Select switch select the Modes in each Channel. In a sensible 

fashion, the gain of each Mode increases as the switch is toggled downward. The Channels are identical, so 

the switch operates the same way triggering identical Modes in each of the two Channels. 
GAIN

In the Badlander, as with most MESA amplifiers, the GAIN is the most critical of all preamp controls. Its setting 

determines much about the character and texture, dynamic content, and sustain factor of the sound and ef-

fectively pre-voices the sound in all three of the (identical) Modes appearing in both Channels. 
Each mode reacts a little differently, but generally speaking, the middle range of the GAIN control provides 

enough of everything and not too much of anything. Most of the middle range is supremely useful for almost 

any style. Best of all, here, the instrument will sound like the instrument, as its character won’t be overshadowed 

by saturation of the various tube stages. 
For classic sounds, we recommend GAIN be set in the lower to middle region, somewhere between 10:30 and 

2:00. This is where you will find the best blend of dynamic preservation and attack mixed with fullness and 

sustain, again, without completely saturating the sound and covering up instrument’s character. 
One good thing to remember is that the lower the GAIN control is set, the more transparency and top end you 

will retain. As the control is increased, the top end will start to recede, and a fuller, 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 is this; As GAIN goes up, BASS should come down. That is a very 

general, broad-sweeping approach, but it is a fairly good way to preserve definition and attack characteristics 

and keep your dynamic content as prominent and intact as possible. Still, reducing the BASS control can’t nul-

lify the compressing and darkening effects created by very high GAIN settings. It helps with the frequencies in 

regard to preserving the attack, but it can’t counterbalance what happens to the dynamic characteristics. The 

best way to preserve dynamic content is by using restraint and common sense with the GAIN control.
The higher region of the GAIN Control is appropriate for Classic, 70s style Rock or overdriven Blues sounds 

in the CLEAN Mode, and Heavy sounds in CRUNCH and CRUSH. From 2:00 on up to 5:30/maxed, the sound 

becomes very overdriven and filled with harmonic complexity. There are amazing sounds up here, you just 

need to learn the ways to preserve attack and clarity through working with the BASS and other Tone controls, 

as well as the overall MASTER setting, to retain as much attack and definition as possible. 
Start by observing the rule of thumb outlined above: reducing BASS while increasing GAIN, and you should be 

headed in the right direction. From there, some fine-tuning elsewhere in the Tone Controls where appropriate, 

but once you’ve familiarized yourself with the frequencies and the interaction between the controls, it shouldn’t 

take long to achieve a great blend. 
Also, many players into heavy styles and fast tempos looking for the best blend of the highest gain and the 

tightest tracking low end possible tend to avoid cranking the MASTER up past the point where you can start 

to feel the power section working and stop before it is being pushed into clipping. 
When the power section is pushed into clipping with high volumes, the tracking and dynamic character change 

as the recovery time of the power supply starts to increase. There may be times to include power clip as part 

PAGE 7

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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