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Vacuum Tube Audio
Owner's Manual
1317 Ross Street Petaluma
California 94954
USA
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Thank you for selecting a Mesa Engineering amplifier to be your instrument of choice in your home or studio playback system. We know how many different products you had to choose from and are honored that you have entrusted us with your hard-earned entertainment funds. We have worked hard to make your new TIGRIS amplifier the best and most comprehensive Tube Integrated we could conceive of and are confident that it will provide you with countless hours of emotional satisfaction and musical
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TABLE OF CONTENTS CHAPTERS: Page # CHAPTERS: Page # 1 - Precautions.................................................. 01 5 - Advanced Features ( Continued ) 2 - Overview...................................................... 1-2 5 - 2 Power Tube Blend............................. 11 3 - Installation................................................... 3 5 - 3 Headphone Output............................ 11 3 - 1 Unpacking............................................ 3 5 - 4 Auto Bias..
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Chapter 1 PRECAUTIONS: Your Mesa Engineering amplifier is a professional instrument. Please treat it with respect and operate it properly. USE COMMON SENSE AND ALWAYS OBSERVE THESE PRECAUTIONS: • Do not expose amplifier to moisture, rain or water, direct sunlight or extremely high temperatures. • Always insure that amplifier is properly grounded. • Always unplug A.C. power cord before changing fuse or any tubes. • When replacing fuse, only use same type and rating. • Avoid direct conta
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Operating Instructions Chapter 2 OVERVIEW: Your new Mesa TIGRIS is an audiophile amplifier with a musical heritage. More than just a playback amp, the TIGRIS is a musical instrument in its own right, handbuilt with the same commitment and passion that we bestow upon our entire line of Mesa/Boogie products. In the realm of live performance, Mesa/Boogie products have earned a stellar reputation for 25 years of innovation, reliability, customer service and for providing the individual soul of
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2 - OVERVIEW: ( Continued, Chassis Illustrations ) FRONT VIEW: TIGRIS CD AUX 1 WARM WARM TAPE AUX 2 V ACUUM T UBE A UDIO OPERATE OPERATE HEADPHONES TUBE BAY: TIGRIS 6V6 EL84 EL84 6V6 12AX7 12AX7 EL84 6V6 EL84 6V6 2/3 PENTODE 2/3 PENTODE POWER POWER 2/3 TRIODE ALL PENTODE ALL PENTODE 2/3 TRIODE COUPLED ISOLATE OFF ON A.C. MAINS POWER SELECT POWER SELECT AUDIO GROUND REAR BAY: TIGRIS PREAMP OUT SPEAKERS STAGE I STAGE II ZERO STAGE III 8 OHM COMMON 4 OHM 4 OHM COMMON 8 OHM NEGATIVE SE
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Chapter 3 INSTALLATION: 3-1 UNPACKING: power cord! Please retain the packing materials for future use and store in a cool, dry place. Should your TIGRIS ever require service at the factory, it is mandatory to ship the amplifier in the original packing materials to prevent in-transit damage. Also, should you change your living quarters, you’ll be glad to have this packing to protect your investment from the hazards of moving. 3-2 LOCATION: The ideal location for the TIGRIS would result in the
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3-3 SPEAKER BINDING POSTS: ( Continued ) sounds superior - or vice versa. Trust your ears! You will not cause damage to your speakers or the TIGRIS by mismatching. Experiment to obtain the most pleasing results! Spades or steel spring bananas, gold- or rhodium plated, are the preferred cable terminations. Spades may be stacked for bi-wiring, or you can use spades and bananas simultaneously. Bare wire should be dressed with solder to prevent strays and offer the binding post lugs a firm and e
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3-4 HOOK-UP OPTIONS: (Continued) Y connector of sorts, because it effectively adds a second pair of outputs to every source component you own. If you want to run two systems from the same source component, you can connect a preamplifier to the Tape Output, which in turn would control a second amplifier. This of course would obliterate this output for recording purposes. To record, the Tape Outputs are connected to the inputs of an anolog recording machine such as a tapedeck or VCR (audio o
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3-4 HOOK-UP OPTIONS: ( Continued ) Passive vertical bi-amplification does not require an electronic crossover. It simply means having two amplifiers of equal or unequal power drive the high - and low frequency drive units of your loudspeakers separately. This is different from using monoblocks where each one-channel amplifier drives only one speaker, or from horizontal bi-amping, where one 2-channel amplifier per speaker drives the high and low frequency inputs with one channel each. In a verti
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3-4 HOOK-UP OPTIONS: ( Continued ) control instead. This avoids running the load resistor of the headphone circuit unnecessarily hot. To mute the speakers in the second- ary room while the main room remains active, either turn off the secondary amplifier or turn the Level Set to zero. We recommend turning off the second amp so that your favorite inter-room level balance stays put by leaving the Level Set at the predetermined setting. Please note that this is merely a basic multi room scenario -
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3 - 8 GROUND SWITCH: At the very right of the Tube Bay is a mini-toggle switch which you will probably set once and then leave alone. The easiest way to understand the purpose of this switch is to consider the TIGRIS as having two separate reference groups to ground: one external and two internal. The internal Grounds are the common zero voltage points for the power supply and audio circuitry. The external Ground is the safety connection of the metal chassis to your home’s Ground Circuit. EL84
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3 - 9 CONGRATULATIONS: (Continued) the amplifier in order to avoid unwanted sudden volume surprises when you are ready to enjoy your music again. You now have successfully installed your new TIGRIS amplifier, enjoy and happy listening! The following chapters include more in-depth coverage of technical issues and explain the advanced features - but if you’re impatient, go ahead and enjoy the music now! Changing the Pentode / Triode switches or the Negative Feedback selector is self-explanatory a
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5 - 1 TANDEM STATE IMAGING: ( Continued ) genetic traits into a new hybrid - such as a rose with no thorns but bigger flowers and stronger scent. With Tandem-State Imaging, you can combine varying amounts of Pentode / Triode operation simultaneously, effectively creating a sonic hybrid that marries the harmonic “rightness” of Triode operation with the dynamics and frequency extension of Pentode power; midrange lushness and bass slam; transparency plus soundstage width; contol with finesse. As
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5 - 1 TANDEM STATE IMAGING: ( Continued ) The feedback settings of the TIGRIS correspond with the following approximate values ( your actual speaker load and the output tab chosen will affect the values slightly ): Full Pentode 2/3 Pentode 2/3 Triode Stage 1 5dB 4dB 3dB Stage II 8dB 7dB 5dB Stage III 12dB
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5 - 3 HEADPHONE OUTPUT: (Continued) what to listen for when you resume listening to your speakers. If you wish to mute your main speakers not to listen to Headphones but while a second pair of speakers is active in a multi-room application via the Preamp Output, we recommend adjusting the multi-room volume with the Level Set attenuator, leaving the Master Volume control at the lowest possible setting. This avoids running the load resistor of the Headphone circuitry unnecessarily hot. Should R
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5 - 4 AUTO BIAS: ( Continued ) Note that the voltage relationship between the three elements is similar and that the difference between cathode and the grid voltages is the same in both examples: The grid is 50 Volts more negative or less positive in both. Thus as far as the electrons are concerned, the static operating conditions between the two systems are quite similar. Cathode...........................................+ 50 (voltage generated across
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5 - 5 CLASS A OPERATION: ( Continued ) amplification was going on in the opposite half circuit. That’s the Class B part. The trick is to get the large magnitude signal to pass back and forth in a push-pull circuit without major distortion occurring due to cut- off. That’s because the tubes, having first been driven into cut-off, must then resume drawing current. That off and on action no longer reflects voltage changes at the grid (musical signal) and thus distortion occurs. By contrast, Clas
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ON TRIODES, PENTODES & IRISHMEN: (Continued) Although the term filament and heater are often used interchangeably, there are specific differences: A filament is a directly heated cathode where cathode coating is applied directly to the heating element. Examples are 5U4 twin diode rectifier and 300B triode amplifier tubes. A heater, on the other hand, is a heating element which is separate from the cathode and is usually inserted within the tubular cathode sleeve. Examples are 12AX7 twin triode
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6 - 1 TRIODES: This section is a continuing technical treatise on the workings of Irish Pubs but to make it easier for the layman to understand, it is explained in terms of vacuum tube technology. Enter the original bar - free beer and no doors. Well, it turns out that some control over the flow can be a necessary and useful advantage. This led to the invention of those swinging louvered saloon doors which are open at the top and bottom. They are patterned after the control grid of the vacuum
