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
internal
speaker
8
int.
Clean
Lead
Reverb
Lead
Volume
Master
Clean
Lead
Bass
Middle
Treble
Power
Stand By
Bright
Screamer 50
Gain
Lo/Hi
Amp
Tube
Input
Lead
Presence
8. two 50 watts amp heads or a Stereo Poweramp (e.g. E840) combined with
one ENGL 412 speaker cabinet set to stereo mode
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
STEREO
MONO
set to
Stereo
412 cabinet:
rear connection panel
9. a 50 watts combo amp combined with one ENGL 412 speaker cabinet
SPEAKER CABINET
RIGHT
THRU
LEFT
INPUT
R
STEREO
MONO
set to
Mono
412 cabinet:
rear connection panel
internal speaker
impedance:
8 ohms
cabinet speaker
impedance:
8 ohms
connected in serial
results 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 #1: Poweramp Output
Stereo Poweramp: Left channel
Amp head #2: Poweramp Output
Stereo Poweramp: Right channel
speaker impedance:
16 ohms Left side
16 ohms Right side
output impedance:
16 ohms
at each poweramp
or stereo channel
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
COMBO: INTERNAL SPEAKER
Combo Amp: Poweramp Output
