EAW MS30 User manual

System Features
- High Technology Reference Monitor designed for digital
and advanced analog audio quality assurance.
- True Flat Power Response, 48Hz to 22k Hz ±3dB over
120 degree arc.
- Absolute Flat Axial Response ±1.5 dB over operating
range.
e Features Dynamic dampening voice coil (patented) woofer
and magnetic fluid dampened tweeter for low harmonic
distortion, and low dynamic overhang distortion.
e High Acoustic Output due to high efficiency and excellent
long term power handling.
The MS-30 reference monitor system is the result
of comprehensive R&D effort to develop a compact
reference standard system for audio production in the digital
age. The development effort utilized extensive subjective
listening evaluations and proprietary objective instrument
testing procedures. The results are flat response not only on
axis but over the entire listening area, wide dynamic range,
and unsurpassed low distortion (both harmonic and time
related transient types).
The significance of true power response accuracy
and dynamic accuracy in a reference audio monitor has
become increasingly important with modern strides for
improved audio quality in transmission, recording and
production. The EAW MS-30 is the first compact monitor
system to offer significant improvements in these two
critical areas in 20 years. Benefits from the use of the MS-30
include quality assurance of frequency, independent stereo
imaging, transient distortion, harmonic distortion, and tonal
balance.
Construction
The Eastern Acoustic Works MS-30 is constructed with
painstaking attention to detail because reliability is so critical
in demanding professional applications. The many extra steps
that EAW takes in the design and construction of the MS-30
provide considerable improvement in performance and
consistency. To maintain that level of performance in every
MS-30 each unit is hand assembled and tested by dedicated
craftsmen for absolute consistency.
High Frequency Assembly
The MS-30 offers fiat power response due to the
careful design of the 26 mm soft dome's crosssection
contouring. The complex driver mounting assembly and
baffle termination prevent any reradiated high frequency
energy from creating time related off axis response
deviations. Excellent transient capabili
ties are provided by the 18,000 gauss-in-the-gap ferrite
magnetic circuit. Magnetic dampening fluid serves as a heat
sink for improved power handling while also lowering
distortion by dampening out cavity resonances. Increased
thermal capability in addition to uniformly smooth and well
dispersed response results in high frequencies with
exceptional reliability and sonic quality.
Low Frequency Assembly
Our 210 mm (8") bass driver utilizes technology
which is years ahead of our competition, allowing for
unmatched response accuracy and inaudible harmonic and
transient overhang distortion. From the proprietary
poly-laminated cone to the patented dynamic dampening
voice coil this driver represents true "state of the art"
performance. Through the application of this advanced
technology we can eliminate cone Bell-mode resonances and
distortion typical of all other vented systems when level is
increased. The latest developments in voice coil adhesives
and former construction permit high power handling for long
term reliability. The 33 liter (1.2 ft2 ) box is optimally vented
for maximally flat response, providing good driver control
and excellent power handling below 100 Hz.
Frequency Dividing Network
The crossover is the heart of any monitor system
and the MS-30 utilizes the most complex crossover available
in any professional studio monitor. Design objectives were
to eliminate even the slightest abnormalities in both the axial
and power response of the system. All design parameters
were mathematically calculated, and then continuously
adjusted during extensive listening and instrumentation testing.
The resulting network is based on a third order filter that
achieves precise phase matching, system equalization and
minimum interaction. Engineering design using many units
enabled allowances for driver tolerances resulting in
production control of a consistency greater

MS-30 Specifications
Frequency Response
On Axis ±1.5 dB: 70 Hz to 18k Hz
On Axis ±10 dB: 43 Hz to 22.5k Hz
Polar Response
30* Off Axis: - 3 dB at 19k Hz
60' Off Axis: - 3 db at 12k Hz
- 6 dB at 16k Hz
Horizontal Dispersion Angle: 12' ±3 dB
Sensitivity (I w at 1m): 90 dB SPL
Power Handling
Long Term Continuous Sine Wave
(100 Hours): 70 watts RMS
Continuous Program: 150 watts
Short Term Peak (10 ms): 400 watts
Maximum Sound Pressure Level
Continuous: 109 dB SPL at I m
Program: 112 dB SPL at 1m
Nominal Impedance: 8 ohms
Crossover Type: Third Order 18 dB
per Octave
Crossover Frequency: 2,500 Hz
Bass Driver
Nominal Diameter: 210mm (8 in)
Voice Coil Diameter: 39mm (1.54 in)
Flux Density: 10,000 gauss
Effective Diaphragm Area: 230 sq. cm
HF Driver
Type: 26mm (I in)
Soft Dome
Flux Density: 18,000 gauss
Enclosure Volume: 33 liter (1.2 ft 2)
Enclosure Type: Vented
Finish: Black
Dimensions: 17 " x 14" x 121/4
than any other professional monitor system. To eliminate the
possibility of crossover variations all components are of the
finest available and are tested in house before and after
assembly. All capacitors are custom manufactured to our
high standards. Inductors are aircore type, hand wound in
house. Each component is matched to within 3% of the
design value. This precision effectively eliminates the
crossover as a source of distortion.
Further information on the MS-30's performance
and comparative data can be found in EAW Technote 0280
"Compact Studio Monitor Comparative Data". Further
information on the design philosophy of the MS-30 can be
found in EAW Technote 0285 "Design Parameters of A
Reference Monitor For Quality Assurance In Audio
Production Applications".