Benchmark AHB2 User Manual

AHB2 Instruction Manual Rev F Page 15
PROTECT Mode - Fault Codes
The following table provides a summary of all possible status display conditions. The MUTE lights
will turn on and stay on whenever a fault condition has triggered the PROTECT mode.
If a fault has occurred, power must be turned off for at least 10 seconds before normal
operation can resume. Identify and correct the cause of the fault before restarting the
amplifier.
POWER
CLIP
TEMP
MUTE
MUTE
TEMP
CLIP
Status
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Power off, or no AC input
ON
ON
ON
ON
ON
ON
ON
AC Startup - lamp test
ON
OFF
OFF
ON
ON
OFF
OFF
Mute on - startup or shutdown
ON
OFF
OFF
OFF
OFF
OFF
OFF
Normal operation, no errors
ON
FLASH
OFF
OFF
OFF
OFF
OFF
Channel 1 clipping
ON
OFF
OFF
OFF
OFF
OFF
FLASH
Channel 2 clipping
FLASH
ON
OFF
ON
ON
OFF
OFF
Channel 1 - Clipping Fault
FLASH
OFF
OFF
ON
ON
OFF
ON
Channel 2 - Clipping Fault
FLASH
ON
OFF
ON
ON
OFF
ON
Chan. 1&2 - Clipping Fault
ON
ON
OFF
ON
ON
OFF
OFF
Channel 1 - Over-Current Fault
ON
OFF
OFF
ON
ON
OFF
ON
Channel 2 - Over-Current Fault
ON
ON
OFF
ON
ON
OFF
ON
Chan. 1&2 - Over-Current Fault
FLASH
OFF
ON
ON
ON
OFF
OFF
Channel 1 over temperature
FLASH
OFF
OFF
ON
ON
ON
OFF
Channel 2 over temperature
FLASH
ON
ON
ON
ON
ON
ON
Power Supply fault or loss of AC
ON
ON
ON
ON
ON
ON
ON
SOA Fault

Benchmark AHB2 Specifications

General

Signal to Noise Ratio	>130dB, A-weighted
Type	Stereo Power Amplifier
Power Output	100W into 8 Ohms, 190W into 4 Ohms
THD+N	<0.00013% at 1kHz, at 100W into 8 Ohms
Input Impedance	50 kOhms
Damping Factor	> 300
Frequency Response	0.1 Hz to 200 kHz (-3 dB)