System Features Compact
Size:
Fits in standard EIA 19" rack
Exceptionally Uniform Response
from 39-22,000 Hz
±
3dB
High Acoustic Output
102.5 dB @ 1 meter (9.75 feet)
Magnetic Damping Fluid
For maximum heat/power dissipation
Dynamic Damping in the Voice Coil
For low distortion during long cone excursions
Design
The MS-50 reference monitor system is designed
to offer high acoustic output combined with accurate
reproduction, in a compact package. It is ideal for use in
radio or television studios, mobile recording, near field
studio, or any other critical listening application where space
is limited. The MS-50 delivers higher acoustic output than
other, similar size systems, in addition to achieving flatter
amplitude response than other "reference monitors". It is a
surprisingly efficient system, yet it is capable of handling up
to 120 watts program or 60 watts RMS with ease. Distortion
is lower than that of even the finest of the systems presently
available. Beautifully conceived ... Remarkably affordable.
Construction
The Eastern Acoustic Works MS-50 is designed
with painstaking attention to detail because reliability is so
critical in demanding professional applications. Its appearance
might lead one to believe that it is a simple two way system,
but the cabinet contains very little that could be viewed as
commonplace.
The Low Frequency Driver
The 210 mm. (8") bass driver utilizes a unique
poly-laminated cone with improved rigidity in order to
eliminate undesirable high frequency information, and to
lower distortion by decreasing Bell-mode resonances
(different parts of the cone resonating out of phase). One o f
the more interesting and innovative features of our system is
the use of a Dynamic Damping voice coil in the woofer.
Conventional vented systems exhibit rising distortion in
proportion to increasing cone travel, because the voice coil
has a tendency to lose control as it leaves the gap. By placing
additional voice coil turns above and below the active coil,
we are able to simulate the acoustic damping present in
sealed box systems.
Acoustically coupled to the cast frame woofer is another 2
10 mm. auxiliary bass radiator which functions as a port
substitute, and facilitates lower response and higher
efficiency than that of other systems.
The High Frequency Driver
Our 26 mm. (1 ") dome tweeter exhibits
exceptionally high power handling capacity as a result o f
precise thermal design. Magnetic damping fluid serves as a
heat sink for the voice coil, as it also eliminates cavity
resonances for a smoother response. The massive magnet
assembly utilizes special machining for precise focusing of all
energy at the voice coil, achieving over 18,000 Gauss in the
gap. This results in an even more extended high frequency
response. Excellent dispersion is derived from careful
contouring of the dome crosssection. The increased thermal
capacity in addition to uniformly smooth and well dispersed
response results in a tweeter of exceptional reliability and
sonic quality.
The Crossover
In addition to using the finest drivers, we've
designed the most sophisticated crossover available in a
compact monitor. Design parameters were mathematically
calculated, and then, continuously adjusted during an
extensive listening evaluation. The crossover was then
subjected to precision acoustic measurement. The resulting
network is based on a third order (18 dB per octave) filter
that achieves precise phase matching, and is specially
compensated for the woofer and tweeter responses and
their interactions, thus allowing for imperceptible transition in
the crossover region.
All capacitors are custom manufactured to the
highest standards. They exhibit exceptionally low loss,
