Octave V 110 SE, Руководство пользователя

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6. ADVANCED FUNCTIONS
6.2. Changing the damping factor
The V 110 SE is the first model in the Octave range that provides another tool, to match the ampli-
fier with any speaker regardless of the construction principle .The V 110 SE allows to change the
damping factor in three settings (LOW, MED and HIGH), and thus achieve an even more sensitive
adjustment to the electrical load (speaker). This is unique in the world and, as always with Octave,
easy to implement. Thanks to a specially developed circuit design the different settings can be
easily realized by exchanging the input tube. Tubes with a different gain factor are used. The
enormous range of usable feedback makes this "amplification / damping factor"-tuning possible.
The amplifiers comes with two additional tubes.
The universal version "MED" is inserted at the factory. This is already sufficient for modern loud-
speaker concepts with great midrange speakers (popular example are the models of the B & W
800 series), whose impedance increases by design in the midrange. The "HIGH" version has ad-
vantages for electrostatic speaker, such as Martin Logan, which usually drop to a very low imped-
ance in the mid-high frequency range. A higher damping factor counteracts the typical level roll off
in this frequency range. The driver tube for the damping factor "LOW" is a useful option for high ef-
ficiency concepts such as Broadband or Horn systems. These speakers yield with amplifiers having
a normal or high damping factor over controlled and then often sound harsh and discordant.
Driver tube no. 5 Level Damping factor For loudspeakers
ECC 81 (12 AT 7) MED 7,2
Normal dynamic speakers
(factory setting)
ECC 82 (12 AU 7) LOW 5
Speakers with high efficiency, and
full-range speakers
ECC 83 (12 AX 7) HIGH 10
Speakers with large impedance fluc-
tuations
The value of the damping factor refers to an average speaker impedance of 8 ohms.
The tubes must be replaced in the amplifiers mains OFF mode, and thus offer a fast,
simple and practical matching of amplifier and speakers.