BOGNER AMPLIFICATION
3
fx loop & return level control – back panel
The Eclipse has a buffered series effects loop with a return level control. It has been optimized for pedal
level.
Connect the send to the input of the effects unit and the return to the output. When the loop is engaged
you can use the return level control to set the volume, most common is to set unison volume when loop is
on or off.
If you do not use any effects in the loop you can use it as a switch-able volume boost. Plug a standard
instrument cable between the send and return, once the loop is engaged you can set a different volume
level via the return level control.
bottom control & punch switch – back panel
Lets you dial in the low end response of the power-amp, to accommodate the speaker cabinet used, as
well as to adjust to the room situation. Turn up for a fuller sound at lower volumes but use conservatively
at higher volumes and band situations when you want you guitar to be heard within the music. The punch
switch will become active as the bottom control is turned up, the higher the control is set, the more
difference you hear. Engaging the switch will bring the sound more in your face, punchier mids.
presence control – back panel
Sets overall brightness for all channels
speaker outputs – back panel
There is no impedance selector and no shunt tip ground protection, therefore it is very important to have a
speaker cabinet hooked up before you flip the standby switch on. There are two 4 and two 8, as well as
one 16 ohm speaker outputs. Use the one which matches your cabinet, a 16 ohm cabinet into the 16 and
so forth. If you want to hook up two cabinets they must have identical impedance and they must be
hooked up to half the value, two 16 ohm cabinet will need to be hooked up to the two 8 ohm outputs.
variac switch – back panel
This switch does the same thing as if you connect the amp to a variac and reduce the input voltage by
about 15-20%. Less input voltage means the power is reduced. This results in richer harmonics with a
softer feel. For maximum clean headroom and tightness, leave the variac switch in the off position.
foot controller – back panel
This is where the foot controller is connected. The supplied cable is uni-directional and the connector is
the same on both ends. Make sure the plug is aligned properly and then push in until the release latch
clicks in, to secure the connection to both the amplifier and the foot-controller. The foot controller gives
you direct access to any of the three channels, as well as the effects loop.
tubes
The Helios Eclipse comes with a matched quartet of JJ EL34’s. Replacing worn or faulty power tubes
should be done by a Technician, as the amp needs to be biased correctly. Five JJ ECC83s are used in
the pre-amp. You can uses different brands and any compatible preamp tubes available. This can change
the sound, gain and feel. V1, closest to the input jack affects all three channels, V2 is only used if ch2 and
or ch3 set to eclipse mode, V3 is always used for ch2 and ch3. V4 is for the loop and V5 is the phase
inverter which is already part of the power amp.
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