8
8
8
8
L
L
R
R
8
8
8
8
L
L
R
R
8
8
8
8
L
L
R
R
Lo Lead
Bottom
Ch II Gain
Ch I Gain
Hi Lead
Bottom
Bright
Bottom
Bass
Bass
Mid-open
Middle
Mid-focused
Treble-Clean
Treble
Treble-Crunch
Lo Lead Vol.
Clean Volume
Crunch Volume
Hi Lead Vol.
open/
focused Ch I /II
Gain
Lo /Hi
Master A
Presence
Master B
Depth Punch
Power Tube Monitor
V1
V2
V3
V4
Input
Power
Stand By
Powerball
Amp
Tube
R
6L6GC
powered
Lo Lead
Bottom
Ch II Gain
Ch I Gain
Hi Lead
Bottom
Bright
Bottom
Bass
Bass
Mid-open
Middle
Mid-focused
Treble-Clean
Treble
Treble-Crunch
Lo Lead Vol.
Clean Volume
Crunch Volume
Hi Lead Vol.
open/
focused Ch I /II
Gain
Lo /Hi
Master A
Presence
Master B
Depth Punch
Power Tube Monitor
V1
V2
V3
V4
Input
Power
Stand By
Powerball
Amp
Tube
R
6L6GC
powered
2. one100 watts amp head combined with one ENGL 412 speaker cabinet
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
Amp head: Poweramp Output
8 Ohms Parallel
1 x 8 Ohms
2 x 16 Ohms
4 Ohms Parallel
1 x 4 Ohms
2 x 8 Ohms
16 Ohms
4
8
Or
8
And
Or->
8
16
Or
16
And
16
3. one 100 watts head combined with two ENGL 412 speaker cabinets
STEREO
MONO
set to
Mono
412 cabinet:
rear connection panel
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
Amp head: Poweramp Output
8 Ohms Parallel
1 x 8 Ohms
2 x 16 Ohms
4 Ohms Parallel
1 x 4 Ohms
2 x 8 Ohms
16 Ohms
4
8
Or
8
And
Or->
8
16
Or
16
And
16
STEREO
MONO
set to
Mono
412 cabinet #1:
rear connection panel
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
STEREO
MONO
set to
Mono
412 cabinet #2:
rear connection panel
option 1
option 2
option 1 & 2
speaker impedance: 8 ohms
output impedance: 8 ohms
speaker
impedance:
cabinet #1
8 ohms;
cabinet #2
8 ohms;
connected
in parallel:
4 ohms;
output
impedance:
4 ohms;
use either
option 1:
cabinet #2
connected
to the
4 ohms
Poweramp
Output
or
option 2:
cabinet #2
connected
to THRU
jack of
cabinet #1
