Octave V 70 Class A, Owner'S Manual

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10. OPTION (SUPER) BLACK BOX
Description
With the Black Box technology OCTAVE offers an instrument for optimizing the OCTAVE amplifier
in respect to the speaker. This flexibility is a unique feature of the OCTAVE brand.
The dynamic and tonal stability of an amplifier is strongly dependent upon the stability and capacity
of the power supply, therefore the Black Box and Super Black Box were developed as external
upgrades to the OCTAVE amplifiers’ power supply storage capacitors by increasing their
capacitance by a factor of 4 (Black Box) or 10 (Super Black Box), respectively. This is a
tremendous benefit if the speaker is difficult to drive. Loudspeaker efficiency is made less critical,
while the amplifier is enabled to handle speakers with minimum impedances as low as 2 ohms. The
power supply capacitance increase realized via use of the Black Box or Super Black Box stabilizes
current delivery and reduces the impedance interaction of the load. This improves dynamic range,
separation, depth, soundstage size and articulation, rendering the musical reproduction clearer
throughout the entire frequency range. The amplifier remains unaffected by mains variations and
interferences due to the noise filtering characteristics of the capacitors
10.1 Option Black Box
.
Legend
(1) Indicator LED
The LED illuminates continuously when the power amplifier is on.
The LED goes out when the protection circuitry trips. This is normal,
because the protection circuitry cuts the power to the amplifier
(2) High-current plug
Connecting to the amplifier

Important! Before connecting the Black Box, switch off the unit using the
power switch and wait for 1 minute .
When inserting the connector, guide the anti-rotation lug carefully into the
mating recess in the socket.
 When you switch on the amplifier, the LED on the front panel of the Black
Box will illuminate.
Note: The LED on the Black Box goes off when the amplifier's electronic
protection circuitry is activated or the Ecomode has turned the unit down.
 Should you wish to disconnect the Black Box, switch off the amplifier first
and
wait until the LED on the Black Box has gone out.