17 DEPTH BOOST
*P.A.Section; Boosts the bottom end in the power amp; this pushbutton is assigned to the Presence A
control.
Tip:
(see section 16, Tip!)
18 PRESENCE A/B
*P.A.Section; Switches between Presence A and Presence B; the active Presence control is identified by
the illuminated LED next to the respective control. Red LED: Presence A (16) and Depth Boost (17); green
LED: Presence B (19) and Depth Boost (20), This feature can also be switched via the MIDI Interface Port
(45), or the footswitch jack (48); the channel selector pushbutton is deactivated once a footswitch is
connected to the footswitch jack (48).
19 PRESENCE B
*P.A.Section; Treble control B in the power amp
Tip:
(see section 16, Tip!)
20 DEPTH BOOST
*P.A.Section; Boosts the bottom end in the power amp; this pushbutton is assigned to the Presence B
control.
Tip:
(see section 16, Tip!)
21 SPEAKER A/B (=OUTPUT A/B)
*P.A.Section; This pushbutton switches between speaker output A (74) and speaker output B (75), if
speakers are connected to both output jacks. The red LED above the pushbutton indicates "speaker B
active". This feature can also be switched via the MIDI Interface Port (45), or the footswitch jack (49); the
pushbutton is deactivated once a footswitch is connected to the footswitch jack (49).
IMPORTANT:
When operating the amp together with one speaker cabinet, always connect it to Output
A/ Master (74)! If no cabinet is connected to Output B (75), the switching function is disabled. Ensure
cabinets or speaker systems bear the same impedance at Output A and Output B: e.g. cabinet at Output
A =8 ohms and cabinet at Output B=8 ohms! Never operate the poweramp without a sufficient load!
Tip:
The speaker switching feature is ideal for driving two speaker cabinets with different response. One
recommended combination would be a closed 4 x 12" cabinet together with an open 4 X 10" cabinet. This
feature offers a number of interesting sound variations.
22 REVERB ACTIVE
This pushbutton activates the integrated spring reverb system. A red LED above the the pushbutton
indicates the reverb is active. This pushbutton's primary significance is during MIDI programming via the
MIDI Interface (if connected). Use it to assign the internal reverb signal to different MIDI presets. Adjust
the reverb portion with the respective Reverb controls in both main channels. Reverb can also be
switched via the MIDI Interface Port (45), or the footswitch jack (49); the pushbutton is deactivated once
a footswitch is connected to the footswitch jack (49).
23 INPUT
Unbalanced 1/4" input jack
24 GAIN
*MCH 2; Input sensitivity control, functions as pre-gain for the Crunch 2 and the Lead channel and
defines the amount of (preamp-) overdrive in the Crunch 2 channel.
Tip:
The Crunch 2 channel sounds more refined and the mid response is harder than in Crunch 1. It is ideal
for playing fast riffs. In conjunction with higher Gain settings and powerful pickups, this channel can be
suitable for playing lead.
25 LEAD BOOST
*MCH 2; Boosts the degree of distortion in the Lead channel, with primary emphasis on the bottom end.
Tip:
When you are using high Gain and Lead settings, we recommend that you leave this pushbutton in
the Off position to avoid a spongy bass response. In Lead mode with medium Gain settings (Gain and
Lead controls between the 11 and 1 o'clock's position), the activated Lead Boost delivers softer mids,
more bass punch and plenty of sustain.
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