NX-5A (Powered Near Field Monitor)
5
Main features of NX-5A
• Woofer featuring the HR (Hyper Radial) diaphragm
The NX-5A employs the 130-mm woofer. It features
the highly rigid HR (Hyper Radial) diaphragm, devel-
oped by using the latest diaphragm technology called
"Radial papermaking technology". As a result, the NX-
5A offers a rich low frequency sound with minimum
distortion.
Furthermore, by using the "UDR tangential edge" for
the woofer edge, it eliminates the unnecessary reso-
nance and achieves pure and clear sound reproduc-
tion (see Figure 1).
UDR tangential edge
HR diaphragm
• Tweeter featuring magnesium diaphragm
The 20-mm hard dome tweeter employs the magne-
sium diaphragm. This tweeter produces natural and
extended high frequencies, while eliminating a pecu-
liar sound which most metallic tweeters may produce
(see Figure 2).
Magnesium dia-
phragm
• HP sound reflectors
The two HP sound reflectors are installed in the en-
closure as shown in Figure 3. In the NX-5A enclosure,
micron wool is also placed appropriately.
This configuration reflects the sound in the enclosure
diffusely and creates the condition where stationary
wave is decayed.
HP sound reflector
• Bi-amplifier power
The NX-5A utilizes a powerful bi-amplifier design (60W
for the woofer, 40W for the tweeter). Driving each
speaker unit independently eliminates audio impurity
caused by the electric interference between the units.
The built-in power amplifier also provides functions
for compensating audio frequency characteristics to
match the sonic character of a room, including the
low frequency (around 55Hz range) equalizer and the
tweeter level control.
The power amplifier is equipped with both the bal-
anced and unbalanced input connectors, allowing
connection to any audio systems.
The arrangement example of the HP sound reflectors (the cut model
above shows the inside of the Fostex NF-1).
Radial paper-forming technology
Using the radial paper-forming technology, speaker dia-
phragms are made from compound materials (pulp, fiber,
etc.) in a radial shape. This technology allows you to make
diaphragms with the desired thickness and strength, which
results in improving the speed and extent of a sound.
UDR (Up/Down Roll) tangential edge
A revolutionary technology is used for the NX-5A woofer
edge. The edge is created by joining up-roll and down-roll at
their tangential surfaces while utilizing FEM model analysis
to determined the optimum bonding points. The UDR tan-
gential edge is adopted to the edge of the NX-5A woofer.
<Figure 1>
<Figure 2>
<Figure 3>
