Duncan BASS 400 X 2 Owner's Manual - Page 9

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demanding conditions (like extremely high volume settings) the current limiting circuit

may engage and cause audible distortion.

In the Bridge mode, optimum amplifier performance is realized with an 8-ohm load. A 4-

ohm load is acceptable, but not recommended. See page 10 for the diagrams showing

proper hook-up configurations for the different operation modes.

5. EFFECTS LOOP: Use this circuit with your effects for the least amount of hiss. In

older design amps, players had to plug their basses directly into effects and plug the

effects into the input jacks on their amps. With the Bass 400 x 2, you can plug your bass

into the Bass Input jack and run your effects through the Effects Loop.

"Effects Send" should be connected to the input of your effect using a normal guitar

cable. "Effects Return" should be connected to the output of your effect using a normal

guitar cable. You want the signal to come OUT of your amp INTO the effect and OUT of

the effect INTO your amp.

Output impedance is 10k ohms.

TROUBLESHOOTING

The following table should enable you with little or no knowledge of electronics, to isolate

the cause of some problems you may experience with your amplifier and the steps

required for repair. Most causes of impaired amplifier performance are due to minor

problems or irregularities, which can be easily corrected by you. However, if you cannot

identify the cause of the problem using the table below, or if it indicates your amplifier to

be defective and in need of repair, return the unit to an Authorized Seymour Duncan

Service Center or call (805) 964-9610 for a Return Authorization number.

Symptom

Amp does not light up and

come on when power

switch is "ON".

Amp lights up, but no sound

when power switch is "ON"

Probable Cause

1) Power not connected

2) Blown amp fuse

1) Bad guitar cable

2) Bad speaker cable

3) Effects are hooked up

Remedy

1) Ensure power cord is

plugged into operative

power outlet

2) Check amp fuse; replace

if blown with ABC-10. If it

continues to blow, call

service center

1) Replace cable

2) Replace cable

3) Reverse hook-up cables