Mesa/Boogie Dual Rectifier Blue Angel Owner's Manual page 8

CONTROLS:
(Continued)
With the BLUE ANGELS' REVERB control, different amounts of the rich ALL TUBE REVERB can be mixed with
REVERB:
the dry signal. It is normal for extreme settings of the REVERB control to slightly alter the sound character of the
amplifier as the voicing of the REVERB circuit becomes more dominant in the mix. This normal, slight alteration, is a result of listening
1 2
BRIGHT
FAT
INPUTS
What...? No, not a carburetor, PROGRESSIVE LINKAGE is a breakthrough concept in power section design. This unique circuit
PROGRESSIVE LINKAGE:
4 X EL-84
2X6V6 SIMUL-
LINK
PROGRESSIVE
LINKAGE
P
URE
bottom end characteristic. They clip fairly early, break up smoothly and stay rich and warm.
2X6V6
This position uses a quartet of these classic tubes to produce it's 33 watts of bright, aggressive power. These tubes
fueled the guitar music of Britain for decades as the workhorse power tube. The sparkling highs and lush harmonic
content that these tubes deliver, have become essential components - highly sought after - of many amp builders, players and
producers of today. The BLUE ANGEL offers these beauties running Class A and biased just right to produce the
4 X EL-84
sweetest clean sound when played soft and yet the elusive "lined up" harmonics when pushed to clip. The EL84
setting retains the tightest bottom end and blend when high Volume settings are used; thus becoming the likely
candidate for rock or crunch style sounds.
And now for the real treat! These two classic and undeniably favorite power tubes, great as they are, can have their drawbacks. When
pushed too far into clip, 6V6s tend to get flubby and indistinct. EL84s conversely, can be thin at times, lacking bass and warmth when
they are tortured. This circuit uses all six power tubes and produces a bouncy rich 38 watts of PURE CLASS A
POWER. It is the patented magic of Simul-Link that sets the ANGELS' power section in a class all its' own. Of the
SIMUL-
LINK
three possible positions, Simul-Link offers the highest power when connected to an eight ohm load (1X12 combo or
2X12). PROGRESSIVE LINKAGE offers a unique alternative and ushers in a new era of usably clippable power.
Combining these two occasionally ill-behaved power tubes by clicking into Simul-Link, allows each tube's quirks to become an asset
when used in tandem. The EL84s and tightness and attack to the looser 6V6. In return, the 6V6's better Bass response warms up the
EL84s, giving them breathiness and a more resilent feel. This combination of tube types produces the most controllable power section
clip we've discovered to date.
NOTE: It is preferable to use the 4 ohm speaker jack when the PROGRESSIVE LINKAGE switch is set to the 6V6 position. This will
reduce strain on the tubes thus prolonging their life as well as improving the response over a wide range of frequencies. It is not
mandatory...merely a suggestion, as the impedance loading is correct when this scheme is followed. This suggested match up
between tubes and speaker impedance will also produce the greatest amount of headroom and the most well balanced tone.
VOLUME MID BASS
utilizes different types of power tubes for different power ranges and styles - enabling you to
select between them or combine them for the ultimate in pushed power expression. With
PROGRESSIVE LINKAGE your BLUE ANGEL is like having three power amps
built into one portable chassis. Three selections are available: 2X6V6s, 4XEL84,
ON ON
and Simul-Link. When both styles of tubes are used simultaneously via Simul-
Link, a unique voice is produced that only PROGRESSIVE LINKAGE can deliver.
POWER
STANDBY
This position produces roughly 18 watts of "Retro" style Class A power. This pair
C A P
LASS OWER
of tubes lends a sweet bubbly nature to the sound and delivers a large breathy
to the REVERB return stage high in the mix and no cause for
alarm.
REVERB
PAGE 4