User Manual

JAM CLASS-A high voltage preamp, no integrated circuits, no NFB
P24
IN
IN
10V
GAIN VOLUMELOW MID HIGH REV (AUX)
RESON
FLAT
OL
150Hz
240Hz
2
IN
P24
GAIN
OL
LOW
HIGH REV (AUX)
VOLUME
OLIN
10V
ø
GAIN
WARM
GAIN
300Hz 3.3KHz
700Hz
PARAMETRIC MIDS
GAIN
300Hz 3.3KHz
700Hz
PARAMETRIC MIDS
LOW HIGH REV (AUX) VOLUME AUX
OUT
1
3 4
STEREO
IN
REVERB
master
DECAY MASTER
LINE OUT INSERT
DI OUT
5
VOLUMELEFT RIGHT
FX RETURN
2.3
2. FRONT PANEL MIC or INSTRUMENT IN
2.1 2.2 2.4 2.5
2.6
2.7 2.8 2.9 2.10 2.11
2.1. MIC INPUT
This input is electronically balanced for XLR type connections. The new MIC/DYN channel is now
conceived for any kind of signal sources. You can plug in vocal microphones. The electronics will adapt to
any situation. No special action is required.
2.2. INSTRUMENT IN
Unbalanced input for the connection of jacks (6.3mm or 1/4”), with optimal sensitivity for high level signals,
the electronics will adapt to any situation. No special action is required.
2.3. P24
The amplier’s XLR input provides 24V phantom power for use with a condenser microphone. Most
condenser (and dynamic) microphones, along with some preamps, can be safely phantom powered. In
certain cases however, phantom power can cause damage to a device. This tends to occur with unbalanced
microphones, preamps or stompboxes that have been modied for balanced XLR use. For any doubt,
please contact us to check the compatibility of your audio device before using the amplier
2.4. 10V
Phantom power supplies the Jack connector with 10V for powering electret microphones.
2.5. GAIN
This variable gain preamplier adjusts the sensitivity level to ensure the best possible processing of the
MIC and the INSTRUMENT IN signal through the channel.
It is important that this input level should be set and optimised in the best way to achieve the cleanest
sound possible.
2.6. OVERLOAD
This LED (when lit) indicates that the level of the inputsignal is too high AND it might introduce distortions
2.7. RESON
The Resonance (notch) lter cuts the frequncy of 150Hz/240Hz, to reduce low-frequncy feedback. Left:
no attenuation (at), Right: maximum attenuation. Use the reson switch to select the resonant frequency
of the instrument (240Hz/150Hz)
2.8. RESON switch
2.9. HIGH, MID, LOW
These controls are devoted to high, medium and low frequency regulation. Offering cut and boost of ±15dB,
they allow a wide range of tonal variations to be explored. When the controls are positioned centrally there
is no cut or boost of the selected frequency band.
2.10. REVERB
This rotary control sets both the level of the digital reverb on the channel and the level of the signal to the
AUX OUT output. If you want to bypass the on-board reverb, you can set the Reverb Master knob to zero
and use the REV/AUX to control the amount of signal to send to an external effect unit or to an additional
monitor.
2.11. VOLUME
This rotatory control regulates the channel volume
2.11. OVERLOAD
This LED (when lit) indicates that the level of the inputsignal is too high so it might introduce distortions