Yorkville NX750P-2 - Manuel (Page 3)

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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 NX750P-2’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 NX750P-2 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
NX750P-2 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
NX750P-2 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 NX750P-2s).
If desired, you can combine a pair of the
NX750P-2’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 NX750P-2’s are used as repeater
cabinets or for side fill). The 100 Hz high pass
filters allow the NX750P-2 to be used more
efficiently with any active subwoofer.
NX750P Series 2 Active Full Range Loudspeaker
Using the popular nx20 as a base, adding 750 Watts of bi-amped power and topping-it-off
with advanced signal processing, the NX750P-2 is destined to set the new standard for active
loudspeakers. The woofer amplifier, or low frequency amplifier, amp delivers over 650 Watts to the 15
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.