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Please read safety instructions before you use this amplifier!!!
Features:
2x EL84 18W Class A cathode biased power amp
EZ81 tube rectifier
2x JJ ECC83s preamp
JJ 5751 phase inverter
Ch1: clean with volume and tone control, 3 position bright switch
Ch2: crunch with gain preset (back panel) and volume control
Ch3: solo with volume control
Ch2+3 share gain, bass, middle and treble control, 3 position voicing switch
Series effects loop
Single instrument input
Power attenuator switch for 1 and 5 watt operation
16, 8 and 4 ohm speaker outputs
Functions on footswitch: Crunch (solo) and Overdrive (clean)
Head only, complementary aluminum speaker cabinet
All aluminum chassis with unique aesthetics
DIMENSIONS and WEIGHTS: Are subject to change anytime, Please measure your amp carefully if a
Custom Case is being made. Add ¾ inch for each, handle and rubber feet.
The head has two screws on each side to secure the aluminum top shell, please note theyneed
clearance on each side!
Head:
6.25" H
1x12 Cabinet:
17"
H
Please read this owner manual completely before use to fully understand your Atma's functions.
input
The Atma has a single high impedance input located on the front panel.
cl/cr/so toggle switch
This switch lets you select one of the three channels if no foot controller is connected. The front panel
display lets you know which controls are active. Whatever control is illuminated at a certain channel
setting can be used to alter the sound.
BOGNER AMPLIFICATION
ATMA USER MANUAL
12.62" W
6.50" D
17"
W
10.50" D
14 pounds
31 pounds
1
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Summary of Contents for Bogner ATMA
- Page 1 17” 17” 10.50” D 31 pounds Please read this owner manual completely before use to fully understand your Atma’s functions. input The Atma has a single high impedance input located on the front panel. cl/cr/so toggle switch This switch lets you select one of the three channels if no foot controller is connected. The front panel display lets you know which controls are active.
- Page 2 This light indicates that the amp is powered on, it is also sensitive to the input level and will flash along with your strumming dynamics. BOGNER AMPLIFICATION...
- Page 3 After connecting a speaker cabinet or other load and with the power cable connected you can turn the power on, flip it from 0 to 1, the pilot light on the front will light up. Please note the Atma has no standby switch.
- Page 4 You have the choice of 16, 8 or 4 ohm output impedance; please use the value which matches your speaker cabinet. A speaker or other load must be hooked up before you turn the Atma on, otherwise you risk damaging the output transformer. If you want to hook up two cabinets you need to get a splitter box which gets hooked up to one of the three outputs, always just use one, never two or three outputs at the same time.
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