Amps > Mesa/Boogie

Mesa Boogie

Mark V Head

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Serial Number: MBMKVH
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Brand: Mesa Boogie
Multi-Channel Mayhem:
The Mark V is loaded with a slew of sonic possibilities. Channel 1 contains the lowest gain sounds of the three channels and can be thought of as the rhythm or clean channel. The other two channels contain modes that work better for soft clip, medium crunch and high gain rhythm work. There is a tight, skinny Clean (toggle up), a warm, rich Fat clean sound with added lower fundamental (toggle center) and a higher gain pushed version of this architecture found in Tweed (toggle down). A channel-global Bold voicing switch adds punch and cut starting in the high mids to help you stand out in a dense mix and give you an increase in headroom.

Channel 2 is the transitional channel between the low gain sounds of Channel 1 and the high gain fury of Channel 3. This channel contains the biggest differences between modes and there is definitely dialing required as you toggle through the voicing modes. A stripped, British-inspired Edge (switch up) unleashes low to mid gain aggression.

Low mids are added for a thicker, throatier "Crunch" sound that travels up the gain scale while retaining a tight attack. And finally, Mark I flips the architecture to arrive at the iconic high gain voice that put Mesa on the map back in 1970 with the little Boogie amp. This creamy voice is infused with thick bottom end and works great for fattening up single note solo sounds. You may want to run the BASS control very low (off to 10:00) when the gain is high in this mode to retain the best attack characteristic and avoid flabbiness. There is also a Normal/Thick switch that affects the Mark I Mode only to add extra gain in the mids for added single note focus.

Channel 3 goes on from there to encompass the best of the Mark Series overdrive sounds. Beginning with the MK II C+ (switch up) the sound is pure, blistering focus and this is the classic Boogie voice of the 80's that became the foundation for players like John Petrucci, James Hetfield, Kirk Hammett, as well as a staple for L.A.'s first call session players of the day Steve Lukather, Mike Landau, Dean Parks, and many more.

Multi-Watt Power:
The bottom 3 position mini toggle in each channel is the Multi-Watt Power feature that determines the amount (wattage) and type (configuration) of power each preamp Channel will be coupled with to create a classic sound. Any amplifier's sound is 50% preamp and 50% power, so this switch is responsible for a large part of a given Channel's personality and feel. The choices repeat for all 3 Channels and they are 90 W, 45, and 10 W. Using the switch is simple... just select the power you want for each Channel, keeping in mind that the greatest headroom, focus and authority will always be found in the 90 watt position. That's how to use it, but for those who want the full story, here it is.

Simul-Class Power:
There's no denying the sonic difference between Class A and Class A/B - but what if you could have both? Since 1981 Simul-Class Power has been the heart and soul of the Mark series amplifiers, imparting its sweet, musical character onto any sound in the vast library of the now classic Mark legacy. Cleans that shimmer with transparent layers of sweet delicate highs, while the bottom end breathes a warm fundamental under a bed of rich low mid ambience. Never harsh - always fat, the Simul lead tone is the quintessential single-note solo sound.

This patented way of wiring an output section with two (or more) pair of output tubes combines two different styles of wiring configurations to arrive at a blend that showcases the best attributes of both. In Simul-Class, one pair of output tubes is wired in the more efficient, cooler running Class A/B Pentode configuration, which produces the greater portion of power and headroom while running cooler. This was the popular way of wiring amplifiers from about the early '60's forward - chosen for its efficient use of tubes, greater power, and reliability. The only sonic penalty for its greater power (Class A/B Pentode wiring) is that it can have a tendency to bring forward the harsher odd-order harmonic content. The Simul solution - add a pair of tubes running in the less efficient, but infinitely sweeter Class A Triode configuration. This style of wiring produces far less power out of a pair of tubes while creating more heat, but it emphasizes the even- order sweeter harmonics and transitions to clip with a soft, rich purring quality like no other.

Choose Your Bias:
Finally a Bias Select switch is included that allows you to run EL34 power tubes in place of the stock compliment of 6L6's. You can run EL34's in just the outside pair or all 4 power tube spots. The EL34 style tubes will produce a brighter, skinnier sound that will clip with a whole different harmonic content that can be nice, especially for recording where you may not need the Channel switching performance of all 3 Channels and can dedicate the amplifier to one specific sound. The 6L6'S will most likely perform better for a wide range of sounds and certainly sound fatter and richer on most all the sounds and produce the greatest clean headroom.

Features:

• 10/45/90 Watts

• 4x6L6 (or 4xEL34), 7x12AX7, 1x5U4

• Bias Select Switch (6L6/EL34)

• Fixed Bias for Consistent, Maintenance Free Performance

• Full Power/Variac Power Switch

• 3 Fully Independent Channels with 9 Modes

• Footswitchable, Channel Assignable or True Bypassable All-Tube FX Loop with Send Level Control (over all channels when activated)

• Output Level Control (over all channels when activated)

• Footswitchable Solo Level Control

• True "Hard" Bypass Switch removes FX Loops, Output Level & Solo Level Controls from signal path

• Tuner Output w/Footswitchable Mute

• Slave Out w/Level Control

• Fan Cooled with On/Off Switch

• External Switching Jacks for Channels 2, 3 (channel 1 is default), EQ and Solo

• Aluminum Chassis

• 4x4 - 8 Button Footswitch

• Slip Cover