Filter
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This combination of
Class D and Class H
amplifier technologies
helps keep distortion to a
minimum while reducing
the need for massive
heat dissipation. In fact,
to a level low enough to
eliminate the need for
heavy heatsinks. The
advantage of this
unique combination of
two-tier and Class D
amplification has
reduced extraneous heat
to the point that nx520p’s
can easily be used in any
orientation (close to
walls, floors and in close
arrays with multiple cabinets).
Competitive active loudspeakers, with
large finned heatsinks, need to be operated
vertically and with plenty of clearance (to
ensure proper heat dissipation and ventilation).
Since you have more versatility in regards to the
orientation of the enclosure, the nx520p
becomes ideal for flying in large clusters and in
point-source concert sound systems. Yorkville’s
designers took extra care making sure that in
tight clusters overheating would not be an issue.
Taking advantage of the design process, an
opportunity was taken to tweak the
electronics for maximum overall speaker
performance and protection. Solutions were
borrowed from our high-end TX-Series PA
systems. The limiters used, at the input and
crossover stages, are a complex combination
of gain reduction and sweeping filters. If the
nx520p is pushed to its maximum input/output
levels, advanced filtering begins rolling off
unnecessary subsonic frequencies. The
processing also protects individual
components ensuring failure free operation
(even after long term operation at close to
maximum output levels). The filter has a
remarkable response time, less then 70ms,
allowing the system to constantly be re-tuning
itself. This makes sure the output is as clean, as
loud and as clear as possible at any given
moment. This is achieved without
negatively affecting the overall sonic
quality of the cabinet. This ensures that the
essential part of the mix, like the vocals or
solo instruments, come out clean and clear
when the cabinet is being
operated at the extremes
of power and woofer
excursion. Extremely
fast and accurate
limiting is in place to
protect the speaker
components.
As a bonus, the
nx520p has a built in
mixer! This allows the
loudspeaker to be
used directly with a
microphone and/or line
source. The loop output allows
additional active cabinets to be driven from
one source (up to a maximum of 50
nx520ps). If desired, you can combine a pair
of the nx520p’s using the mixer inputs on
each cabinet and coupling the loop outputs.
In this example you would have an ideal
presentation system. Two microphone inputs,
two line inputs (optimized for CD, Cassette or
laptop computer audio source), complete
within two speaker cabinets. As mentioned,
our active cabinets can be linked together,
the limitation is that only three ‘mixers’ can
be active at any one time. This allows three
Mic sources and six line sources available in
an array of three or more cabinets). The
microphone inputs have equalization and
high pass filtering designed appropriately for
vocal applications. The trim control allows
looped cabinets to be individually adjusted
in level. This is invaluable in applications
where large numbers of cabinets are used
such as in clusters or in trade show
applications (or when nx520p’s are used as
repeater cabinets or for side fill). The 100 Hz
high pass filters allow the nx520p to be used
more efficiently with any active subwoofer.
1
nx520p Active Full Range Loudspeaker
Using the popular nx20 as a base, adding 550 Watts of bi-amped power and topping-it-off with
advanced signal processing, the nx520p is destined to set the new standard for active
loudspeakers. The woofer amplifier, or low frequency amplifier, amp delivers over 450 Watts to the
12 inch neodymium woofer. To reduce the overall weight of the amplifier section, the woofer
amplifier uses Class D switching technology. A 100 Watt, two-tier linear technology, Class H amplifier
drives the 1 inch diaphragm horn driver. This allows the horn to produce clean transients while
keeping up with the high output of the woofer. Two-tier amplifier technology isn’t typically seen in a
product like this, however we found the advantages (lower weight, more efficiency, higher
headroom and lower operating temperature) made it a perfect choice for powering the top end.