background image

121 effects

It is this edge which plays a key part

in the overall performance of the

units.

SOFT DOME HF UNIT

Fostex could have opted for a

standard soft dome tweeter for the

NF-1/NF-1A. But as good  as these

are in standard form, Fostex felt the

need to develop a new type of soft

dome unit, one which features UFLC

in its construction.

Conventional soft dome units exhibit

minute ‘pinholes’ in the damping

materials resulting in dips in the

frequency response. In using UFLC

materials, Fostex have eliminated

these, made a 30% weight reduction

and widened the frequency response

across the range.

But all this attention to detail would

have counted for nothing if Fostex

had, like others, used plastic or

pressed metal driver frame

assemblies.

This is because these types of

construction do not, unlike the die-

cast aluminium frame used for the

woofer and tweeter units in the NF-

1/NF-1A, offer optimum vibration

suppression.

ENCLOSURES

A monitor enclosure is much more

than just the box in which to house

the driver units. It too must be

acoustically designed to minimise

the vibrations which can colour and

degrade the sound.

The NF-1/NF-1A time-aligned bass-

reflex enclosures features a number

of construction and acoustic

treatment techniques, which

combine to offer an ideal chamber

for suppressing vibration and

unwanted reflections.

These include:

A unique internal baffle

configuration (patent applied

for), using HP sound reflectors

to naturally extinguish standing

waves.

21mm thick super-rigid MDF

particle  board for the main

enclosure construction

widening to 33mm where the

drivers are mounted.

Rounded edges on the front

baffle for reduced reflection of

mid-frequency sounds.

Two precisely tuned 2"

cylindrical ports for increased

bass response whilst

maintaining a compact

enclosure.

T H E   T R U T H

Hooking up a pair of Fostex NF-1’s

or NF-1As for the first time is

somewhat of a revelation. You may

be surprised at what you hear. Your

material may sound better. It may

sound worse. But at least it will be a

true representation, free from any

sonic coloration and distortion.

Which is where we came in.

P

R

O

F

E

S

S

I

O

N

A

L

 

N

E

A

R

 

F

I

E

L

D

 

S

T

U

D

I

O

 

M

O

N

I

T

O

R

S

NEWLY DESIGNED
BASS REFLEX SYSTEM

Although the NF-1/NF-1A uses a bass reflex
enclosure, Fostex have, again, 
re-worked the technology to provide real
gains in terms of bass response
characteristics.
This has involved the active utilisation of the
reverberent sound caused by the internal HP
reflectors which exits the enclosure through
the two bass-reflex ports.
(Something which is just not possible with
enclosures which only use conventional
glass fibre for internal damping).
The placement of the exit ports was also
critical in allowing a smooth and natural
blending of the sound coming from the
woofer and tweeter units.

P

R

O

F

E

S

S

I

O

N

A

L

 

N

E

A

R

 

F

I

E

L

D

 

S

T

U

D

I

O

 

M

O

N

I

T

O

R

S

INTERNAL
ARCHITECTURE

The internal architecture of an
NF-1/NF-1A has been
acoustically designed to
minimise resonances and
vibration which can add
unwanted colour to the sound.

HP SOUND
REFLECTORS

The inclusion of HP sound
reflectors prevents the
generation of standing waves in
the enclosure.

Like the HP drivers, the
constantly varying 3rd-order
curved surface of the HP
reflectors, along with their
carbon fibre/PBO construction
minimises self resonance.

NF-1 CONNECTIONS

For optimum performance and
flexibility, the NF-1 features a
4-terminal connection hub.
This allows for bi-wiring and
bi-amping techniques.

NF-1 CROSSOVER
DESIGN

The extremely natural and
ultra-smooth transition
between woofer and tweeter
units is due to another
breakthrough in monitor
design.
While the high frequency UFLC
tweeter unit uses a low loss
6dB crossover, the smooth roll
off of the low frequency
woofer, (afforded by the
unique HP diaphragm
technology), renders the use of
a crossover for this unit
obsolete.

Отзывы: