User Manual
INTRODUCTION
JAM becomes the third member of Schertler’s “next generation” acoustic amplication
series. The new 5-channel “all-rounder” combines a comprehensive feature set with the
updated technology and enhanced “look” that denes all the models in this latest range.
Equipped with a 1” dome tweeter and 8” woofer, and featuring an optimized 2-way bass
reex construction, JAM offers 200W (150W + 50W) of bi-amplied power. The amplier
includes a balanced microphone (XLR) input, an unbalanced mic/instrument input and an
input offering both balanced microphone and unbalanced mic/instrument options. Both
instrument inputs feature a Bootstrap technology that enables the input to automatically
adapt to any impedance. A separate stereo input channel will additionally accommodate
devices such as a computers, MP3 or CD/DVD players. A 5th FX Return channel can
also be used for inputting line level devices.
The 3 main microphone/instrument input channels include a Gain control for input
sensitivity regulation and 3-band EQ, with parametric mids on input channels 1 and 3
and a switchable resonance (notch) lter (240Hz/150Hz) on channel 2. Phantom power
is supplied for condenser and electrostatic microphones. Each of these channels also
features an overload LED. Channel 1 is additionally equipped with a phase reverse switch
to prevent feedback, or unwanted effects between the various channels.
JAM’s Master Section controls include a new adjustable DI Out, a new Mute button, a
Line Out enabling the connection of external systems, a digital reverb and an Insert for
connecting an external dynamics processor. Connection options are further enhanced
with an Aux Out (Channel 1) that also enables connection to other systems. A Low Cut
lter (cutting frequencies below 180Hz) can be used with instruments that generate
aggressive low frequencies. This also enables a separate subwoofer to be connected
without causing any damage to the amplier. JAM is additionally equipped with a high
voltage CLASS-A preamp that has no integrated circuits and No Negative Feedback
(NFB).