Chapter Five: Power Amplifier
5.1 Tone and Volume of the Power Amplifier
5.1.1 Master Volume
As the name suggests, this controls the overall, volume of the amplifier. There is also
a second, selectable master volume control, which allows volume adjustments via
remote control device while playing.
5.1.2 Presence
The presence knob controls frequencies over 3kHz. Treble is produced and dispersed
in a very small beam from the speaker, so be sure to position yourself in the
projection area of the speaker when making adjustments.
5.1.3 Deep
The Deep Control is an active bass control contrary to conventional bass controls. It
controls the frequencies around 120Hz without influencing the overall dynamic range
of the power amplifier. Diezel Co. is not responsible for disintegrating speaker
cabinets.
5.2 Power Amplifier Tubes
5.2.1 Function
As the name suggests, the power amp section is the part of the amplifier that
produces output power, measured in watts. Preamp signals are sent to the
poweramp(s), which amplifies this signal to a level that is acceptable for
loudspeakers. Guitar amplifiers utilize several different types of power amps, which
differ in output power and tone. We chose the tube type power amplifier for its tried
and true performance and familiar tonal behavior.
5.2.2 Selection
Diezel Co. installs the most reliable and best sounding tubes that are currently
available in sufficient quantities. So it is possible that tube brand and tube typewill
change during production. You can fine-tune your Einstein by having different type
and brands of tubes installed, however, it is imperative that the amp is biased
properly. Einstein utilizes 4 power tubes, organized in 2 pairs with dual bias
possibility. This allows use of 2 different pairs of power tubes, either the same or the
different types.
