American Audio DIGI-PRO Guide de l'utilisateur Page 34

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Eleven Rack User Guide28
‘66 AC Hi Boost
Originally released in 1958, the British amp we
based our ‘66 AC Hi Boost model upon went
through a few design changes that would even-
tually define the sound of British pop/rock in
the ‘60s.
First available as a modification mounted in the
back of the amp, the “Top Boost” circuit added
an extra tube and controls for Treble and Bass. It
became so popular that it eventually became a
part of the standard componentry of the amp.
The glassy high-end and chime of the AC Hi
Boost lends a classic propulsion to rhythm gui-
tar parts, and at higher gain settings, singing
lead tones are a snap to achieve.
For our model, we’ve “jumped” the Normal and
Brilliant channels. The Cut (presence) control is
active on both channels. However, just like the
original, the Treble and Bass controls are only
part of the Brilliant channel, and have no effect
on the Normal channel.
Go to the second Control page and press SW2 to
toggle the tremolo on and off.
‘67 Black Panel Duo
Without a doubt, the blackface-era amp we
based our ‘67 Black Panel Duo model upon is
considered one of the greatest combo amps ever
made. With two 12-inch ceramic-magnet speak-
ers and a quartet of 6L6 tubes pushing 80 watts,
no concert stage has been complete without one
since it was introduced in the late 60s.
One of the main reasons for the amp’s popular-
ity is that it can maintain classic vintage clean
sounds even at high volume levels. Another spe-
cial Black Duo feature is the inclusion of a Bright
switch.
For our model, just like the original, as you turn
the Volume knob up, the Bright switch has less
of an effect. Dial the Volume knob around 3 or 4
with the Bright switch on, and you’ll get that ul-
tra-clean snap that it’s famous for.
On the first Control page, SW2 is set to toggle
the Bright switch on and off. On the second
page, SW2 toggles vibrato on and off.
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