Name: Benchmark AHB2
Brand: Benchmark
Rating: 4 (1 reviews)

To Next Page

To Previous Page

AHB2 Instruction Manual Rev F Page 17

Over-Current Fault

The output current of each channel is constantly monitored. If either channel reaches an output

current of 18 Amperes, this fault is triggered and both channels are muted to protect the amplifier

and speakers. A power reset will be required.

Fault Display:

 POWER light is On

 Both TEMP lights are Off

 Both MUTE lights are On

 One or both CLIP lights are On

Typical Causes:

 The load impedance of the speakers may be too low

 Speaker cables may be shorted

Required Actions:

 Check for shorted speaker cables

 Make sure the nominal Stereo load impedance is 3 Ohms or higher

 Make sure the nominal Bridged Mono load impedance is 6 Ohms or higher

 Turn down the audio source

 Restart the amplifier

Speaker impedance always varies with frequency. Speaker impedance may be much lower than the

rated "nominal" impedance at certain frequencies. The over-current fault detection circuits prevent

potential damage that can be caused by driving very high signal levels into very low impedances.

In STEREO mode, at full output, the 18 Amp limit can be reached if the load impedance dips below

about 2 Ohms. In MONO mode, at full output, the 18 Ampere limit can be reached if the load

impedance dips below about 4 Ohms.

Questions and Answers:

Need help?

Do you have a question about the Benchmark AHB2 and is the answer not in the manual?

Benchmark AHB2 Specifications

General