Gain
Bright
Ultra
Gain
Input
Depth
Bass
Middle
Treble
Presence
Master A
Master B
Power
Stand By
Fireball
Power Tube
Monitor
V1
V2
Amp
Tube
Gain
Bright
Ultra
Gain
Input
Depth
Bass
Middle
Treble
Presence
Master A
Master B
Power
Stand By
Fireball
Power Tube
Monitor
V1
V2
Amp
Tube
8
8
8
8
L
L
R
R
8
8
8
8
L
L
R
R
8
8
8
8
L
L
R
R
6. one 50 watts amp head combined with one ENGL 412 speaker cabinet
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
7. one 50 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
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
speaker impedance: 8 ohms
output impedance: 8 ohms
speaker
impedance:
cabinet #1
8 ohms
cabinet #2
8 ohms
connected
in serial:
16 ohms
output
impedance:
16 ohms
8
16
Or
16
And
Or->
16
8
Or
8
And
16 Ohms Serial
1 x 16 Ohms
(Use Left Jack!)
2 x 8 Ohms
8 Ohms
Parallel
1 x 8
Ohms
2 x 16 Ohms
8
16
Or
16
And
Or->
16
8
Or
8
And
16 Ohms Serial
1 x 16 Ohms
(Use Left Jack!)
2 x 8 Ohms
8 Ohms
Parallel
1 x 8
Ohms
2 x 16 Ohms
Amp head: Poweramp Output
