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M90 Modena – Owner’s Manual – Ver: 2.21 11 Elmwood Amps
BACK PANEL
Back Panel
Speaker outputs
• Two jack sockets for 1*4 ohm or 2*8 ohms impedance.
Here you connect either one 4 ohm cabinet or two 8 ohms cabinets.
• Two jack sockets for 1*8 ohm or 2*16 ohms impedance.
Here you connect either one 8 ohm cabinet or two 16 ohms cabinets.
According to Ohms law:
Two 8 ohms speakers in parallel equals 4 ohm and two 16 ohms speakers in parallel
equals 8 ohm.
Cooling fan
On the back grill of the M90 sits a fan for cooling the tubes for extended tube life and for
evacuate the heat built up inside the cabinet.
Make sure that the fan is running at all times when the amp is switched on.
Control knobs
• Edge
The Edge control is global; it affects both channels.
Adjusting this clockwise will add high mid/treble to the sound.
• Fat
The Fat control is also global; it affects both channels.
Adjusting this clockwise will add low mid/bass to the sound.
• Mix
Mixing control for the F/X loop. When set full counter clockwise, at the 10% mark,
the loop is in parallel. Only a small amount of the connected effect pedal/rack unit
in the send/return jack sockets will be mixed in the dry signal.
By turning the Mix knob more towards the 100% mark the F/X loop becomes
more serial.
When turned fully clockwise, to the 100% mark, the F/X loop is in serial mode.
The F/X loop is designed to suit both stomp boxes and rack units and operates at
-10 dB level. The F/X loop is active on both channels.
Note: Never operate the amplifier without a connected speaker
since this can cause severe damage to the amplifier.