LANSCHE AUDIO
OPERATING INSTRUCTIONS No.5.1
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Tips on using the No.5.1
The CORONA plasma tweeter is able to reproduce the most finest of details which other tweeters
such as: diamond, beryllium, electrostatic and ribbon etc. cannot.
The following points should be observed:
a.
When playing SACDs, noises like hiss or multiple tones can sometimes be heard.
This is due to the SACD 1 bit, 64Fs format which inherently produces much noise above 50kHz.
This noise level depends of the ADC used in recording of the SACD, the SACD player or the
separate DSD capable DAC. If your DAC or player has selectable digital filters for SACD (DSD)
then by selecting the appropriate filter the noise can be reduced or eliminated. If your SACD
player has a „NORMAL/WIDE‟ filter switch on the rear panel, switch it to ‟NORMAL‟
b. The use of „switching‟ or „digital‟ amplifiers should be used with caution. Some produce too many
switching harmonics which can easily be heard. Also, some analog amplifiers which use switching
power supplies can produce this type of noise too.
3.2. Self-starting of CORONA
The method the CORONA produces sounds is by breaking down the surrounding air molecules with
high temperature and then modulating the air molecules with a high frequency carrier wave. An
electrode with a pointed tip is used to make contact with the air and thus produces a corona
discharge (plasma ball).
The self-starting of the CORONA is dependent on the following combined conditions:
The cleanliness of the electrode.
The characteristics of the vacuum tube inside the CORONA which generates the high frequency
modulation carrier wave.
The total amount of running hours on the electrode
The self-starting ability of all CORONA plasma tweeters will differ slightly due to the above combined
variables.
CAUTION:
Never put any fluids, sprays from aerosols or insert other objects in to the CORONA’s
chamber for starting purposes, damage will occur.
3.3. Maintenance
Unlike standard tweeter systems, CORONA plasma tweeters have no moveable parts that are subject
to aging or wear. However, after a certain period of use, they do require maintenance. The
components subject to depletion are the vacuum tube and the electrode. These parts have been
designed to function for at least 5,000 hours of operation (depending on environmental conditions).
Should a CORONA plasma tweeter require maintenance, we are always able to restore it to a new
condition and to introduce any technical improvements.
