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 Nx55p’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 Nx55p 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 Nx55p 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 Nx55p
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
Nx55ps). If desired, you can combine a pair
of the Nx55p’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 Nx55p’s are used as repeater cabinets
or for side fill). The 100 Hz high pass filters allow
the Nx55p to be used more efficiently with
any active subwoofer.
NX55P Active Full Range Loudspeaker
Using the popular nx20 as a base, adding 550 Watts of bi-amped power and topping-it-off
with aadvanced signal processing, the Nx55p 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.
