Mesa/Boogie Rectifier BADLANDER EL84/25 Owner'S Manual Download Page 14

Some purists like to run the MASTER all the way up and raise the GAIN until they reach their desired sound–the 

thinking there being that this achieves the “purest” sound. The belief is this resembles removing the control 

altogether from the signal path, and in a way it does. However, most all the “vintage non-master” amplifiers 

have discrete resistors in that place in the circuit anyway to adjust or “tune” the output of the preamp to the 

power section’s sensitivity. 
The MASTER is nothing more than a variable resistor that offers an infinite range of settings possibilities be-

tween the preamp and power section, which makes the amplifier many times more versatile with basically no 

sonic penalty. The main difference being perhaps the carbon element in the pot might have slightly different 

characteristics than a given fixed resistor. That said, not only do we test for that and choose the best sound-

ing resistive element material, but also, it’s hard to fairly determine what the difference might be, as playing 

volume affects how the amp (and speakers) respond and impart their signatures to shape your perception of 

those qualities at a given volume.
If you prescribe to the above old school approach, then, by all means, use the MASTERS in this way... it won’t 

hurt the amplifier. However, realize that you may be severely limiting the sounds you can achieve by removing 

the limitless great-sounding combinations of GAIN and MASTER settings.  

NOTE: 

VERY high settings of the Master combined with high output pickups can potentially overload the input 

of the IR circuitry, causing unwanted distortion. If you notice some unpleasant clipping at the IR Output with 

the Masters high or all the way up, turn the Master down until it goes away and readjust the Input Trim Level 

on your interface or console to make up the gain difference. 
MULTI-WATT™ POWER

This 2-position mini toggle allows the selection of one of two different power ratings. The upper position runs 

both EL84s in Pentode wiring for approximately 25 watts of power. 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 tonal character as well, and this provides yet another way to 

shape and color your sounds. 
25 watts (Full Power) produces the biggest sound and most girth, most accurately tracking low end response 

and fullness in the lower mid-range that speaks with authority and punch. 25 Watts is also capable of the loud-

est clean headroom and sheer output volume in the overdrive Modes. Soloing in the 25 Watt setting will deliver 

the most authority, dynamic sensitivity, and sonic width, so we like it best when it’s time to shine, especially in 

dense mixes recorded and/or live.
10 watts reconfigures the power tube wiring to Triode style, which is a more vintage configuration that pro-

duces less power and is associated with a sweeter, smoother transition to clipping and, some feel, a warmer 

sound. Here it is included for its reduced wattage and therefore lower volume capability, as much as for its 

tonal characteristics. The 10 Watt setting allows you to drive the power tubes into clipping more easily should 

that be desirable and incorporate even more of their character into your sounds in the Modes. 
The reduced wattage comes with some tradeoffs, and the first you will likely notice is a reduced tightness in 

the low end, potentially affecting its accuracy in tracking. For heavy sounds, especially those used for very 

precise rhythmic parts, the 25 Watt/Full Power setting will be a better match. 
If you are recording or simply enjoying the Badlander in your home for more classic rock sounds and other 

styles where tight tracking low end isn’t the priority, and you don’t need high volume levels, the more traditional 

side of the first two Modes is potentially enhanced by the Triode operation of the tubes. CLEAN wound up, 

and CRUNCH set somewhere on the lower 2/3 of its GAIN range both reveal really cool, more traditional-gain 

classic rock, nu-country, and even blues sounds in the lower 10 watt setting.  
POWER - AC

This 2-position toggle switch controls the delivery of the AC Mains power to the amplifier. Make sure your in-

PAGE 11

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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