Phil Jones Bass PJB DOUBLE FOUR Owner's Manual page 4

Each speaker is fed with its own Pulse Width Modulation PWM amplifier. PWM
amplifiers are extremely efficient compared to more traditional analog solid state
amplifiers converting more electrical energy to power the speakers instead of getting
hot. Heat in electrical circuits is the enemy to reliability and since the amp is running
at lower working temperature, the DOUBLE FOUR will give years of service long
after other amps have faded away. By using dual amplifiers one to each speaker, the
bass control is greatly improved since the damping factor is doubled. Damping factor
is the amplifiers ability to put on the "brakes" stopping the speaker cone from
overshoot and tightening up the bass sound, so the sound is punchy, tight but never
muddy or bloomy out of control bass.
The cabinet may be as small as a shoe box but it is built to the same standards of all
PJB cabinets, heavily braced internally and damped with acoustic damping materials
to prevent cabinet coloration that can kill the true sound of your instrument. What you
hear from the DOUBLE FOUR is the closest you can get to how your instrument
actually sounds.
The DOUBLE FOUR may just be a practice amp but it does not mean that it has to
sound like a practice amp. The sound is huge for its size and you may find it hard to
believe that all the sound from your bass is just coming out of such a tiny jewel.
AMPLIFIER FEATURES
· Switchable high gain input OR low gain stage with mute function.
· One stereo input for Drum mac hine or I-po d/MP 3 playe r.
· 3 Band EQ.
· Line Output for recording or driving another amplifier.
· Sophisticated protection circuitry.
· 70watt RMS Amplifier.
· Can use on any AC voltage worldwide. (90~240V)
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