Octave V 16 Single Ended, Owner'S Manual

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6. ADVANCED FUNCTIONS
6.1 Subsonic Filter
Single ended amplifier designs are sensitive in respect of extremely low frequencies below 20 Hz.
Such low frequencies can occur during analog playback and in blockbuster soundtracks. Therefore
the subsonic filter prevents distortions caused by low level signals. The subsonic filter is a second
order filter design, cutoff frequency is 22 Hz / - 3 db.
The subsonic filter is active for all three inputs and can be switched
OFF or ON with switch (9) (see chapter 5 “Connections – the rear panel)
6.2. Protection
The V 16 Single Ended features a comprehensive electronic monitoring and protection system. This
system will automatically switch off the V 16 Single Ended in case of a fault occurring in the power
section, respectively the power tubes. The protection system has been designed to keep the unit
safe from all consequences of overloads of any kind and to protect the output tubes from current
surges.
The red “protection” LED lights up in the ventilation louver [No. (7), chapter 4 “Controls – the front
panel”] to indicate that the protection system has tripped.
The amplifier will not play music once the protection system has tripped
If a Black Box or a Super Black Box is connected to the V 16 Single Ended, the front panel (operate)
LED of the Black Box / Super Black Box will go out. If the (Super) Black Box is connected, tripping
the protection system will automatically activate the discharge circuit of the (Super) Black Box (see
chapter 10 “Option (Super) Black Box”).
The following conditions can cause the protection system to trip:
- Overdriving the V 16 Single Ended to excessive levels or with excessive levels of low-
frequency.
- A fault in one or more of the output tubes.
- A fault in one of the driver tubes which overloads the affected channel.
Once the protection system has tripped, the only way you can turn the V 16 Single Ended back on
is to turn the ON/OFF switch OFF and then ON again. Allow the unit two minutes to cool down before
switching back to ON. If possible, identify and eliminate the cause of the problem (see chapter 11
"Troubleshooting").
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