Description

The ENGL Fireball 25 Blackout 25W tube guitar amp head distills the Fireball platform into a compact all-tube design centered on a pair of 6L6 power tubes and flexible output scaling. Four ECC83 preamp tubes feed Clean and Lead channels with independent Gain controls, shared Bass, Middle and Treble EQ, Lead Volume, Presence and Master controls. Mid Boost expands the voicing options, while an adjustable noise gate, tube-buffered serial effects loop and rear-panel power soak with Full, Mid, Low Power and Speaker Off settings give the amp practical control across different rigs and volume requirements. For players moving between home recording, rehearsal and stage use, the Fireball 25 Blackout delivers Fireball high gain in a compact 25W format with adaptable power and routing.

Clean and Lead Channels With Focused Gain Control

Clean and Lead channels give the Fireball 25 Blackout separate gain settings while sharing the main three-band EQ. Lead Volume, Presence and Master controls provide additional level and high-frequency adjustment, while Mid Boost adds another voicing option when more midrange emphasis is needed. The straightforward control layout keeps the two-channel format direct while leaving enough range to move between cleaner sounds and higher-gain settings.

6L6 Power With Flexible Output Scaling

Two 6L6 power tubes produce the amp's 25W output, while the rear-panel power soak provides Full, Mid and Low Power settings plus Speaker Off. The selectable output modes let the same head adapt to different volume requirements without changing the core channel and EQ layout. A line output adds another routing option for compatible recording, monitoring and downstream equipment.

Noise Gate and Buffered Loop Support Complete Rigs

An onboard noise gate with rear-panel threshold adjustment helps manage unwanted noise at higher gain settings, while the tube-buffered serial effects loop provides a dedicated path for delays, reverbs and other processors. A dual footswitch jack supports the ENGL Z4, and speaker outputs accommodate one 8–16-ohm cabinet or two 16-ohm cabinets. Made in Germany and finished in the all-black Blackout aesthetic, the ENGL Fireball 25 Blackout 25W tube guitar amp head combines compact dimensions with the switching, routing and output flexibility required for modern high-gain rigs.

ENGL Fireball 25 Blackout 25W Tube Guitar Amp Head - Black
ENGL Fireball 25 Blackout 25W Tube Guitar Amp Head - Black
ENGL Fireball 25 Blackout 25W Tube Guitar Amp Head - Black

Features

  • 25W tube guitar amp head with Clean/Lead channels, 6L6 power and power soak
  • Four ECC83 preamp tubes with two 6L6 power tubes
  • Independent channel Gain controls with shared 3-band EQ
  • Mid Boost switch for added midrange emphasis
  • Full, Mid and Low Power settings from the rear power soak
  • Speaker Off mode included with the power-soak controls
  • Adjustable onboard noise gate for higher-gain operation
  • Tube-buffered serial FX loop for external processors
  • Line output plus ENGL Z4 footswitch connection
  • German-made construction with all-black Blackout styling

Specs

General
  • Product type: Tube guitar amp head
  • Series: Fireball Blackout
  • Model: Fireball 25 Blackout
  • Vendor model number: 633BO
Power
  • Output power: 25W
  • Preamp tubes: 4 x ECC83 (12AX7)
  • Power tubes: 2 x 6L6
  • Power soak: Full, Mid, Low Power, Speaker Off
Channels and Controls
  • Channels: Clean, Lead
  • Gain controls: Separate per channel
  • EQ: Bass, middle, treble
  • Additional controls: Lead volume, presence, master
  • Voicing: Mid Boost
Effects and Switching
  • Effects loop: Tube-buffered serial
  • Noise gate: Yes
  • Noise gate control: Rear-panel threshold
  • Footswitch connection: Dual jack for ENGL Z4
Outputs
  • Speaker outputs: 1 x 8–16 ohms or 2 x 16 ohms
  • Line output: Yes
Dimensions and Weight
  • Width: 9.1"
  • Depth: 16.5"
  • Height: 7.9"
  • Weight: 24.3 lb
Other
  • Country of origin: Germany

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