The correct mains fuse rating for the product is printed on the chassis (see ‘ Rear Panel Features’).
Use only the
same type and rating as specified for the product
. Be advised that different operating voltages require the use
of different types of line cord and attachment plugs. If you are unsure, please contact your Orange Dealer.
BEFORE USING YOUR AMPLIFIER
Always ensure the amp's volume control(s) are set to zero before switching on the power to amplifier.
To prevent hum and electrical noise operate your amplifier and instruments as far away from other electronic
devices (especially fluorescent and neon lamps) as possible as these generate extremely high levels of electronic
noise.
SPEAKER OUTPUTS:
Make sure the correct speaker load is connected at all times during operation in one of the following
configurations:
•
1 x 8 Ohm cabinet
– Use either speaker output (rear panel).
•
2 x 8 Ohm cabinets
– Use both speaker outputs (rear panel).
•
1 x 4 Ohm cabinet
- Use either speaker output (rear panel).
IMPORTANT NOTES FOR CONNECTING SPEAKER CABINETS:
• Do not use two speaker cabinets of mismatched impedance!
• Do not connect a speaker load which is less than 4 Ohms!
• Always connect to a speaker cabinet(s) of suitable power handling!
• Only connect speakers using a quality dedicated Speakon connection. Never use an instrument cable!
Failure to observe these points may cause damage to both the amp and cabinet(s).
Note:
A speaker must remain connected when the DI Output and/or Line Output is in use.
VENTILATION and RACK MOUNTING:
Rack Units: 2U 19"
OB1 series amplifiers must remain sufficiently ventilated at
all
times. During sustained periods at high volume
levels the internal fan will start operate and may be audible. Do not obstruct the fan or the cooling vents.
FRONT PANEL FEATURES
