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Front Panel

1 Input

¼" unbalanced input jack. Plug your guitar in here using a shielded cord.

A tip from the designer:

Depending on the type of cord and its shielding, you may occasionally encounter interference from 
sources such as radio stations or powerful magnetic fields. When this occurs, try connecting your guitar 
to the amp using different cords. What's more, to minimize signal degradation due to high-frequency 
loss, use the shortest cords feasible (as a rule, the shorter the cord, the less susceptible it is to 
high-frequency attenuation).

2 Clean Gain

This knob determines input sensitivity of the Clean Channel, in other words, the input level 
of the preamp during Clean mode.

A tip from the designer:

The amount of distortion depends on the type of pickups your guitar is equipped with. Single coil 
pickups may overdrive the preamp when the knob is set to about the two o'clock position in Clean 
operating mode, pickups with very high output levels (humbuckers or active pickups) will evoke 
distortion at even lower settings. If you want squeaky clean tone, simply back off the Gain knob 
accordingly.

3 Lead Gain

Gain control for the Lead Channel. This Control knob determines input sensitivity when the Lead 
channel is active. Use it to dial in the desired amount of preamp saturation level.

CAUTION:

 Extremely high gain and volume levels in Channlel 2 mode can produce powerful feedback. 

Avoid feedback squeals; they can lead to hearing loss and damage speakers! At higher volumes, back 
off the Gain and Treble levels in order to prevent unchecked feedback!

4 Bright

This feature boosts the upper end of the high frequency range for the Clean channel. Its intensity 
decreases as gain settings increase.

A tip from the designer:

For a crisp or glassy tone, activate the Bright boost. It brightens the sound of humbucking or muddy 
pickups. Use it to tweak the amp's tone to taste, activating it to boost top-end frequencies for the 
Clean channel or deactivating it to dampen high end response

.

        Fireball 100 - more tone, more punch, more Fireball than ever before - burn up the 
stage and feel the heat! The ENGL Fireball 100 guitar amp head offers all essential sound 
features in addition to a practical, clear layout for all players who appreciate 
straightforward structures.  
In its cool "black magic" optical appearance the amp delivers a mighty bottom end punch 
well suited for playing power chords and solos with precise accentuation, courtesy of its 
powerful 6L6GC-100 watts poweramp. Sparkling clean sounds and every imaginable 
nuance between Clean and Hi Gain Lead tones belong to the repertoire of the Fireball 100 
amp.
Other trademark ENGL features include: * two Master volume controls A and B, * 
electronic poweramp monitoring * and a variable / switchable FX Loop. Additionally, the 
sound shaping features Bottom and Mid Boost lets you reinforce ingeniously this particular 
pressure in low-end and the low-mid frequency range, thus expanding the amps' tonal 
spectrum. ENGL improved another important audio kink - an adjustable noise gate for the 
Lead channel. 
Old world craftsmanship and highest quality components are part of what makes ENGL 
amps so special and the Fireball is no exception. On that note, please read and heed the 
guidelines on handling all-tube amps. You'll find them on the last page of this manual. The 
ENGL team is convinced that the Fireball amp will delight and inspire you - just plug in your 
guitar and play! 

Power

Stand By

Bass

Middle

Treble

Master A

Master B

Bright Bottom

Clean

Lead

Input

Mid

Boost

Presence

Power Tube Monitor

Lead Gain

Clean Gain

Lead Volume

Fireball 100

V3

V4

V1

V2

2

1

3

4 5

6

7

8

9

1011 12

13

14

15a-d

16

17

Power Tube Failure

Indication System

Amp

Tube

Summary of Contents for Fireball 100

Page 1: ...Fireball 100 Operator s Manual Full Tube Guitar Amplifier Please first read this manual carefully Tube Amp Tube Amp...

Page 2: ...assy tone activate the Bright boost It brightens the sound of humbucking or muddy pickups Use it to tweak the amp s tone to taste activating it to boost top end frequencies for the Clean channel or de...

Page 3: ...a footswitch so you can adapt the amp s fundamental sound on the fly say to better support rhythm guitar work singing leads and slashing power chords With a handy MIDI switcher such as the ENGL Z 11 y...

Page 4: ...f and on again When you press the standby switch to turn the amp on again the system again measures the current sent to the tube If it is still too high the power amp must be checked by a service tech...

Page 5: ...peres 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 Wi...

Page 6: ...control for the FX Loop When the knob is set to Dry the amp signal is routed through with no processed signal 0 wet balance added to the mix Twist the knob clockwise to blend in the processed signal p...

Page 7: ...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 Nois...

Page 8: ...2AX7 or 7025 input stage 2 stage grade FQ selected V 6 ECC83 12AX7 Lead driver stage 4 stage grade selected V 7 ECC83 12AX7 FX buffer stage poweramp driver stage grade selected V 8 ECC83 12AX7 phase s...

Page 9: ...if the preamp works fine without these peripheral devices Is the Noise Gate activated in the Lead channel and the Threshold 22 knob set to a high value Deactivate the Noise Gate 22 for a quick check...

Page 10: ...Power Tube Failure Indication System Sound sample LA Hairy Clean Power Stand By Bass Middle Treble Master A Master B Bright Bottom Clean Lead Input Mid Boost Presence Power Tube Monitor Lead Gain Cle...

Page 11: ...ain Lead Volume Fireball 100 V3 V4 V1 V2 Power Tube Failure Indication System Sound sample Rock Rhythm Amp Tube Amp Tube Power Stand By Bass Middle Treble Master A Master B Bright Bottom Clean Lead In...

Page 12: ...the amp s housing front or rear panels Use a soft damp cloth or sponge with diluted soapsuds or a standard brand of mild dishwashing liquid instead Never use solvents they can corrode the amp s vinyl...

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