Mesa/Boogie Rectifier Stereo manuale d’uso

OO GI E B M ESA Owner's Manual[...]

Hello from the Tone Farm... YOU, the smart player and all around intuitive human, have put your trust in us to be your amplifier company. This is something we do not take lightly. Our reward is that we've made a classic amplifier and by choosing this amplifier, you have become part of the MESA family...Welcome! Our goal is to never let you dow[...]

Precautions OVERVIEW 1/2 FRONT P ANEL CONTROLS & SWITCHES LEVEL CONTROLS 2 PRESENCE 2 POWER ON 3 ST ANDBY 3 MODERN 3 REAR P ANEL - SWITCHES & JACKS INPUTS A / B 4 BIAS SWITCH 4 GROUND LIFT 5 SPEAKER JACKS 5 TUBE BA Y 6 DRIVER TUBES 12AX7A 6/7 AC RECEPT ACLE 7 LINE FUSE 7 TUBE MAINTENANCE DIAGNOSING POWER TUBE F AILURE 8 DIAGNOSING PRE-AMP T[...]

PRECAUTIONS & W ARNINGS Your MESA/Boogie Amplifier is a professional instrument. Please treat it with respect and operate it properly. USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS: YOUR AMPLIFIER IS LOUD! EXPOSURE TO HIGH SOUND VOLUMES MAY CAUSE PERMANENT HEARING DAMAGE ! No user serviceable parts inside. Refer service to qualified per[...]

P AGE 1 Overview: Congratulations on your choice of the RECTIFIER STEREO 2:100 as your power amplifier and welcome to the MESA/Boogie Family . This 2 rack space unit is born of legendary stock and traces its lineage to the mighty Dual Rectifier Solo H ead . Here the stunning performance of the Dual is faithfully recreated in a stereo format that du[...]

Overview: (Continued) Without further delay , connect up your favorite preamp and get ready to experience one of the most commanding sounds in rack-mount history as Recto power goes stereo for the first time in this amazing package. NOTE: BEFORE YOU MOUNT THE 2:100 IN YOUR RACK! This is an extremely aggressive and powerful amplifier intended for us[...]

P AGE 3 FRONT PANEL CONTROLS: (Continued) POWER SWITCH & POWER UP: First remove the protective covers from the tubes (plastic webbing) before con- necting the A.C. cord to a power receptacle. Make all necessary connections including pre-amp, ef fects, speakers and instrument before you flip the ST ANDBY switch to its ON position. AC power is tu[...]

INPUTS: Located on the Rear Panel, these two 1/4” jacks are the Channel A and Channel B inputs for the 2:100. These are the inputs for pre-amps and/or effects, depending on how you have your system wired. Y ou may drive the 2:100 with your pre-amp directly or choose to come from the last ef fect in a chain and drive the power amp this way . Eithe[...]

P AGE 5 TUBE BIAS: (Continued) We recommend the 6L6 for reliability: In our many tests and continued use of the currently available EL34 type power tubes on the market today , we regret to say that they do not appear to be as rugged in construction as the available 6L6 . This is another reason why your 2:100 was shipped with 6L6 power tubes. If you[...]

P AGE 6 SPEAKER OUTPUTS: (Continued) NOTE: If you opt to use only one channel of the 2:100 with speakers connected to that channel’s output only , you must turn the unused channel’s level control to zero! Otherwise the channel will be operating without a load, and damage to the tubes and/or the transformer will result. TUBE BAY: The power tubes[...]

P AGE 7 REAR PANEL (Continued) DRIVER TUBES: 3 x 12AX7A to grab hold of the particular pre-amp tube when replacement is required. Do not allow your fingers, hands or rings/jewelry to come into contact with any other part (s) of the amplifier ’ s internal circuitry . No other user serviceable parts exist in side. Refer service to qualified personn[...]

P AGE 8 TUBE NOISE & MICROPHONICS Y ou may occasionally experience some form of tube noise or microphonics. Certainly no cause for alarm, this quirky behavior comes with the territory and the T one. Much like changing a light bulb, you don’t need a technician to cure these types of minor user serviceable annoyances and in fact, you’ll be am[...]

P AGE 9 DIAGNOSING PRE-AMP TUBE PROBLEMS: Because your amplifier is an all tube design, it is quite possible that you will at some point experience minor pre-amp tube noise. Rest assured - this is no cause for alarm and you can take care of the problem yourself in a matter of minutes by simply swapping tubes. Let us begin by saying; It is a “very[...]

P AGE 10 An Article written by Randall Smith Here’s a question we often hear: “Why doesn’t MESA put bias adjustments in their amplifiers?” Well, there’ s a short answer and a long answer to this question. The short answer is that during my 12 years of repairing Fenders, one of the most frequent problems I saw was bias controls that were e[...]

P AGE 1 1 BIAS ADJUSTMENT: (Continued) V oltage and current are NOT the same. Current is the AMOUNT of electricity , the “quantity” — and is measured in amperes. V oltage is the degree of electric charge — like the “pressure” to use the old water analogy . Let me illustrate how different voltage and current are: When you scrape your fee[...]

P AGE 12 BIAS ADJUSTMENT: (Continued) Again, this has some merit .. but it’s still not as good as using tubes that are matched in the first place because compensating for the mis-match causes the push-pull circuit itself to become unbalanced. T wo wrongs don’t really make a right. Some of the other recommended biasing, “methods” — such as[...]

P AGE13 SPEAKER IMPEDANCE MATCHING & HOOK-UP GUIDE: IMPEDANCE: Wiring up speakers to provide the most ef fective load and making sure that all of them are in phase will help in creating the best sound possible. This is not too dif ficult, as long as you understand a few things about loading and how to connect your speakers to provide an optimal[...]

P AGE 14 SPEAKER IMPEDANCE MATCHING & HOOK-UP GUIDE: (Continued) PARALLEL: When wiring in parallel, the resistance of the speakers decreases. T wo 8 Ohm speakers wired in ( hooked-up ) Parallel results in a 4 Ohm load. It’ s easy to calculate the effect of a resistive load when all the speakers are all the same resistance. It is really not su[...]

P AGE15 1 2 5 4 4 Ohm Cabinet 3 8 OHM 4 OHM 4 OHM Partial back view of some Mesa amp 8 Ohm Cabinet SAFE MISMATCH WIRING SCHEMES...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 Partial back view of amplifi[...]

P AGE16 8 OHM 4 OHM 4 OHM Partial back view of amplifier 8 Ohm Cabinet 8 Ohm Cabinet 6 8 Ohm Cabinet 16 Ohm Cabinet 8 4 OHM 4 OHM 8 OHM Partial back 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 Ohm [...]

P AGE17 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[...]

P AGE18 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 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 Cabinet PARALLEL BOX 8 Ohm 16 Ohm 16 Ohm 16 Ohm Cabinet SAFE MISMATCH 14[...]

P AGE19 UN-SHIELDED CABLE RETURN - R EQ LEFT RIGHT MAIN OUT TIP RING SLEEVE RETURN - L LD1 - LD2 EXT SW REC OUT FX SEND RHY - LD EXT SW 10% 100% FX MIX HANDMADE IN CALIFORNIA GROUND OOGI E B M ESA CIRCUIT PATENTS PENDING LIFT 117 V~ 1 AMP 60 HZ. WIRING EXAMPLE #1 2:100 ALL TUBE STEREO POWER AMPLIFIER SHIELDED CABLE Mesa/Boogie all tube Formula Pre [...]

P AGE 20 SUGGESTED WIRING #2 IN MIDI OUT STEREO (MONO) FX LEFT RIGHT OUTPUT LEFT RIGHT (MON0) AC POWER UNSHIELDED CABLE UNSHIELDED CABLE INPUTS STANDBY ON POWER ON INPUT FT.SW. CLEAN BRIT FAT RAW MODERN VINT GAIN TREBLE MID BASS PRESENCE MASTER LIVE BRIGHT CH 2 VOICING WARM RECORD CHAN 1 FOOT SWITCH 2 CHAN OUTPUT OUTPUT LIVE SOLO BRIGHT -3DB R ECTO[...]

P AGE 21 ON TRIODES, PENTODES & IRISHMEN: A look into the inner workings of the V acumm T ube With apologies to Friends and Relatives from the Emerald Isle - who will make their appearance soon enough - the humor which follows is dedicated to the memories of Spec McAulif f and Fae (Rafael) McNally , two of the T rue Greats. As their numerical r[...]

P AGE 22 ON TRIODES, PENTODES & IRISHMEN: ( Continued ) Thus a diode tube - one with a cathode and an anode - is mostly used to rectify alternating current into direct current by passing it without a cathode and an anode - is mostly used to rectify alternating current into direct current by passing it without restriction, but in one direction o[...]

P AGE 23 ON TRIODES, PENTODES & IRISHMEN: ( Continued ) PENTODES: (Continued) stopping them. The influence of the plate takes over and - being solid metal and of the highest positive attraction - it is at this final destination that the electrons congregate. Thus the proper cocktail waitress - visible through the louvers - is scantily clad so a[...]

The Spirit of Art in Technology OO GI E B M ESA Thank you for trusting MESA/Boogie to be your amplifier company and we wish you many years of toneful enjoyment from this handbuilt all tube instrument.[...]

The Spirit of Art in Technology 1317 Ross Street Petaluma, CA 94954 USA (707) 778-6565 FAX NO. (707) 765-1503[...]