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Thornton Dexter - InfoA special order Dexter Head and FastBack 212 made from selected Pippy Oak, complete with matching hand turned spalted oak rotary knobs.A special order Dexter Head and FastBack 212 made from selected Pippy Oak, complete with matching hand turned spalted oak rotary knobs.

 

The first product released in the Thornton Amplifier range is the Dexter 20 Watt Push-Pull Pentode guitar amplifier.

In brief, Dexter is an all thermionic valve (tube) signal path guitar amplifier, available as a head or a combination amplifier/loudspeaker.  Also available is the 'Fastback 212' loudspeaker cabinet, housing 2 of our no-compromise custom 12" drivers, with the option of mixing Alnico and Ceramic drivers, all in a quickly convertible premium quality cabinet.

The Dexter amplifier offers 2 switchable channels and 2 alternative channel modes, each channel has independant volume and 2 band tone controls.  Channel A is primarily a 'clean' channel; it will maintain minimal distortion with increasing gain, to the point where the power amplifier stage is overdriven.  It has substantial gain available, allowing high levels of power amplifier distortion.

Channel B has a 'Master Volume' so the preamplifier can be easily overdriven and used at low volume levels.  Even more substantial gain is available than with Channel A, allowing significant power amplifier overdriving and the ability to blend preamplifier and power amplifier distortion characteristics.

Then, for even greater tonal sculpting, the Dexter amplifier has 'Schizoid' and 'Psycho' modes.  Schizoid mode reconfigures the amplifier so that Channel A drives the input of Channel B.  This allows tonal shaping both before and after the preamp overdrive valve circuits.  Psycho mode again reconfigures the channels so that they are used in parallel, offering any combination of both channels.

 

Stainless steel chassis and fixings.  Carefully engineered custom transformers.  Custom valve retention hats for envelope damping.Stainless steel chassis and fixings. Carefully engineered custom transformers. Custom valve retention hats for envelope damping.The power amplifier stage has our exclusively developed 'Voicing' control which affects the tonal characteristics of the power amplifier stage independantly from the channel tone circuits.  Also, a low power mode down-rates the power amplifier to 5 Watts and reconfigures the valve topology to Triode Mode for different power stage characteristics.

Control Summary:

    Instrument Inputs - Normal & High Gain

    Controls for Channel A - Volume, Bass, Treble (tone circuit differs from Channel B type)

    Controls for Channel B - Gain, Volume, Low Tone, High Tone (tone circuit differs from Channel A type)

Other controls - Voicing (rotary control), Channel/Mode Selection (rotary switch), FX Loop level (slide switch), amplifier power selection (toggle switch), impedance selection (banana bar), AC power voltage (rotary selector), power switch (rotary switch)

Power Amplifier Section:

    17-20 Watts Push Pull Class A/B Pentode

    Selectable Low Power Triode Mode

Loudspeaker Type (Combo Version) choice of:

    Custom Manufactured Thornton TL12A1 12" 60W Alnico Magnet, or

    Custom Manufactured Thornton TL12C1 12" 70W Ceramic Magnet

 

A Dexter Combo made from Oak with matching Oak rotary knobs.A Dexter Combo made from Oak with matching Oak rotary knobs.

 

 

 

 

 

 Thornton FastBack 212 Covertible Cabinets.  Available loaded with our custom Alnico drivers, Ceramic drivers or a mix.Thornton FastBack 212 Covertible Cabinets. Available loaded with our custom Alnico drivers, Ceramic drivers or a mix.