2012 Jackson Ampworks Britain 4.0 - 2 Channel Amp Head

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All of the classic British guitar tones of the last 50 years plus a tone of new, modern tonal combinations all in one compact 2 channel amp head. 

Channel 1 is an EF86 based preamp that was featured in the original Britain but has been updated with a footswitch-able boost circuit that true bypasses the Treble and Bass controls. Channel 1 is considered the dirty channel of the amp and offers a very broad frequency response. Think cranked Marshall or Hiwatt tones

Channel 2 is a 12AX7 based “Top-Boost” preamp that balances perfectly against Channel 1 by providing pristine clean tones incredible headroom and articulation. Think Vox!

"Channels 1 and 2 are internally linked so that the use of the input labeled “1/2” sends the guitars signal to both channels equally. In this arrangement, each channel is active along with its associated tone controls and blending of the two channels is a simple as adjusting the Volume control for each channel. The true advantage of this type of arrangement lies in the ability to blend Channels 1 and 2. Plugging into the input labeled “2” breaks the internal connection to Channels 1 and 2 thereby allowing them to function independently. This feature allows the musician to use a completely different signal chain (floor based effects etc.) for each channel if desired, and is fully expanded by the use of an ABY box to select channels 1, 2 or both. With all of these tonal options available, the Britain 4.0 truly delivers Two Channels, Infinite Tones.

So Versatile It’s Like Having four amps in one!  Each of the 4 power modes have been developed to add versatility and character to the tone while giving the player the ability to carry one small amp that will work in any musical setting.Given its power and performance, the Britain 4.0 really is like having four amps in one!"

Year: 2012

Brand: Jackson Ampworks

Model: Britain 4.0

Finish: Black and White Tolex

Amp Type: Class A

Power: 15-50 Watts

Power Section: x2 EL34, x4 EL84

Preamp Section:

  • Channel 1: x1 EF86
  • Channel 2: x1 12AX7

Phase Inverter: x1 12AX7

Rectifier: Solid State

Front Panel Controls: Volume, Treble, Bass for both channels

Back Panel Controls: On/Off Switch, Standby Switch, Fan Speed Switch, Bias Trim, Power Changing Switch, Speaker Impedance Selector, 



Footswitch: No

Special Features: The Britain 4.0 features a unique footswitch-able boost circuit for the Britain’s now legendary EF86 channel, series effects loops for each channel, and selectable 15/25/30W Class A or 50W Class A/B operation that features 2 different sets of output tubes for unmatched versatility!

midsize amps