R
REPLACE FUSE
ONLY WITH SAME TYPE
AND RATING !
DO NOT OPEN !
RISK OF ELECTRIC SHOCK !
DO NOT EXPOSE THIS EQUIPMENT
TO RAIN OR MOISTURE !
CAUTION !
!
FX Loop
Send
Return
Balance
Dry Effect
100 W All-tube Guitar Amp Head
Fireball 100
TYPE E635
designed by Horst Langer
MADE IN GERMANY
Poweramp Output
4
8
Or
8
And
Or->
8
16
Or
16
And
8 Ohms Parallel
1 x 8 Ohms
2 x 16 Ohms
4 Ohms Parallel
1 x 4 Ohms
2 x 8 Ohms
16
16 Ohms
Threshold
Off-Lo
Hi
Noise Gate
Lead Channel
Footswitch
Clean/Lead
Master A/B
Mid Boost
FX Loop off/on
Amp
Tube
Or->
Rear Panel
20 21
23 24
25
26
18 19
27
28
22
18 AC SOCKET: (AC Power Inlet; IEC - C14 connector)
Connect an AC cord here.
CAUTION:
Ensure you use an intact AC cord with an insulated plug only!
Before you power the amp up, ensure the voltage value printed beside the
AC socket corresponds to the available current.
19 AC Fuse Box
Contains mains fuse (rear chamber) and spare fuse (front chamber).
NOTE: E
nsure replacement fuses bear identical ratings (refer to the table)!
20 Footswitch Mid Boost; FX Loop off/on;
Use this 1/4" Stereo jack to connect a conventional footswitch with two switching functions, for
example, the ENGL Z-4 (2 x off/on - Single Pole Single Throw or SPST for short). This type of footswitch
lets you access Mid Boost and FX Loop off/on. One of the two switches activates Mid Boost, while the
the other activates the FX Loop. Plugging a footswitch into this jack disables onboard Mid Boost (10)
switching.
Note also: A footswitch may be equipped with LEDs indicating the given switching status. Each of the
two switches is provided with approx. 10 milliamperes current, which suffices to power a standard
LED. The jack's mono terminal ("tip") selects Mid Boost (passive <--> active), while the stereo terminal
("ring") controls the FX Loop (off <--> on). For pin assignments, see "Wiring of Principal Connectors".
21 Footswitch Channel Clean - Lead; Master A - B;
Use this 1/4" Stereo jack to connect a conventional footswitch with two switching functions, for
example, the ENGL Z-4 (2 x off/on - Single Pole Single Throw or SPST for short). This type of footswitch
lets you access the two channels and Master A/B. One of the two switches activates Clean or Lead,
while the other activates Master A or B. Plugging a footswitch into this jack disables onboard channel
(11) switching.
Note also: A footswitch may be equipped with LEDs indicating the given switching status. Each of the
two switches is provided with approx. 10 milliamperes current, which suffices to power a standard
LED. The jack's mono terminal ("tip") selects Clean <--> Lead switching, while the stereo terminal
("ring") controls the Master A <--> B feature. For pin assignments, see "Wiring of Principal Connectors".
22 Noise Gate Threshold
This control knob activates an onboard Noise Gate serving to suppress excess noise in the Lead channel
when you twist it to the right, near or just beyond the 9 o'clock position. Use this knob to set a
threshold value (that is, the noise level) at which the Noise Gate activates to suppress the signal within
the 9 to 5 o'clock range. The further you twist the knob to the right, the higher the signal level at
which the Noise Gate kicks in. If you set the knob to the 5 o'clock position, the Noise Gate reacts to
extremely high noise levels, meaning that there's not much of a margin between the guitar signal and
background noise.
IMPORTANT note; please read and heed:
The Noise Gate may open up inadvertently when the Noise
Gate is activated, a high-gain Lead channel is selected, and the volume exceeds the Threshold knob
setting. At very high volume and gain settings, this may generate instant feedback, particularly if your
guitar is facing the speakers. Rather than musical and controlled, this is the shrill, unpleasant and
potentially harmful variety of feedback squealing that sends your audience and fellow musicians
packing. Though the amp is not more susceptible to feedback when the Noise Gate is activated, the
fact that it suppresses extraneous noise means you can't hear those telltale signs that feedback is
swelling and consequently can't take measures to suppress it. For this reason, make an extra effort to
be careful when the Noise Gate is activated: Before you approach the amp and speaker cabinet with
your guitar in hand, turn the guitar's volume knob to the far left position (to 0 so that no signal is
audible) to prevent the pickups and speakers from interacting!
A tip from the designer:
Noise is a definite no-no in many situations. For example, studio etiquette demands that you keep a lid
on extraneous noise during short breaks. It's in the nature of high gain rigs to generate undesirable
peripheral noise in overdriven channels. This is attributable to the physical properties of an amp's
constituent components, in particular its active components. That's right; those cherished tubes are the
culprits. The Noise Gate is a tool that lets you silence this noise during breaks by way of signal mute
circuit. Note that electric guitars pick up interference signals, and these are amplified tremendously at
high gain levels in Lead mode.
