Name: Benchmark AHB2
Brand: Benchmark
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AHB2 Instruction Manual Rev F Page 18

SOA Fault

The SOA (Safe Operating Area) of the output power devices is constantly monitored. If this safe

operating area is violated, both channels are muted to protect the amplifier and speakers. A power

reset will be required.

Fault Display:

 POWER light is On

 Both CLIP lights are On

 Both TEMP lights are On

 Both MUTE lights are On

Typical Causes:

 The load impedance of the speakers may be too low

 Speaker cables may be shorted

 Amplifier has been overloaded with a high-amplitude test tone

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

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Benchmark AHB2 Specifications

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