S-40
Compact Monitor
radiating soft dome tweeter. The tweeter is
ferro-fluid cooled and uses flexible tinsel
lead wires to prevent thermal or mechanical
failure. These features in addition to the large
magnetic system make this the most rugged
tweeter ever used in a system this size.
wide and smooth frequency response shown
in Figure 1. This response was measured at
1 meter, using a 2 Volt (1 watt) input in an
anechoic chamber. The response is 1/3-oc-
tave averaged and no external equalization
was used.
Description
The Electro-Voice S-40 is an extremely com-
pact high- performance monitor loudspeaker
system. It is ideally suited for indoor or out-
door applications requiring high-quality
sound reproduction. As a near-field moni-
tor in control rooms or broadcast studios, or
as a foreground or background loudspeaker
in restaurants and clubs, the S-40 is the
choice of professional users. Its high power
handling also makes the S-40 an ideal loud-
speaker for nearfield monitoring in live per-
formance situations. Threaded inserts in the
cabinet in combination with the optional
mounting hardware provide a flexible
mounting system for virtually any applica-
tion.
These high quality components will provide
years of listening pleasure when driven at
reasonable levels. However, sometimes
loudspeakers are accidently over-driven,
causing the drive units to fail. To prevent
against this, EV engineers have incorporated
independent woofer and tweeter protection
circuits in the S-40. These circuits will au-
tomatically reduce the power being delivered
to the drivers if their threshold is exceeded,
greatly reducing the possibility of driver fail-
ure.
Directivity
The polar response of the S-40 speaker sys-
tem at selected 1/3-octave bandwidths is
shown in Figure 4. These polar responses
were measured in an anechoic environment
at 10 feet using 1/3-octave pink noise inputs.
The frequencies selected are fully represen-
tative of the polar response of the system.
Beamwidth of the system utilizing the com-
plete 1/3-octave polar data is shown in Fig-
ure 2. Rq (Q) and directivity index (Di) are
plotted in Figure 3.
The low-frequency section is a 5-1/4" di-
rect-radiating woofer with a polypropylene
cone installed in an optimally vented high-
impact polystyrene enclosure. This combi-
nation produces an exceptionally extended
bass response with relatively high efficiency
for an extremely small enclosure. The use
of plastic materials for the enclosure and cone
allow the loudspeaker system to be used in
high-humidity environments.
Both drivers feature low-flux-leakage de-
signs enabling the speaker to be used in close
proximity to video monitors. For very criti-
cal video monitoring applications, a mini-
mum distance of four inches from the edge
of the loudspeaker to the edge of the CRT is
recommended.
Power Handling Capacity
To our knowledge, Electro-Voice was the
first U.S. manufacturer to develop and pub-
lish a power test closely related to real-life
conditions. First, we use a random noise
input signal because it contains many fre-
quencies simultaneously, just like real voice
or instrument program. Second, our signal
contains more energy at extremely high and
Frequency Response
The combination of 5-1/4" woofer, 1-inch
tweeter and optimized crossover result in the
The high-frequency section is a 1-in. direct-
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S-40 Compact Monitor
proof of purchase of the product in the form
of a bill of sale or receipted invoice.
FIGURE–1 Axial Frequency Response
100
Incidental and
Consequential Damages Excluded: Prod-
uct repair or replacement and return to the
customer are the only remedies provided to
the customer. Electro-Voice shall not be li-
able for any incidental or consequential dam-
ages including, without limitation, injury to
persons or property or loss of use. Some
states do not allow the exclusion or limita-
tion of incidental or consequential damages
so the above limitation or exclusion may not
apply to you. Other Rights: This warranty
gives you specific legal rights, and you may
also have other rights which vary from state
to state. Electro-Voice Speakers and
Speaker Systems are guaranteed against
malfunction due to defects in materials or
workmanship for a period of five (5) years
from the date of original purchase. The Lim-
ited Warranty does not apply to burned voice
coils or malfunctions such as cone and/or coil
damage resulting from improperly designed
enclosures. Electro-Voice active electronics
associated with the speaker systems are guar-
anteed for three (3) years from the date of
original purchase. Additional details are in-
cluded in the Uniform Limited Warranty
statement.
FIGURE–2 Beamwidth vs. Frequency
360
300
200
100
80
For warranty repair or service informa-
tion, contact the service repair department
at: 800/685-2606 or 501/354-0111.
60
40
30
For technical assistance, contact Technical
Support at 866/78AUDIO, M-F, 8:00 a.m.
to 5:00 p.m. Central Standard Time.
20
Specifications subject to change without
notice.
3
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S-40 Compact Monitor
FIGURE–3 Directivity vs Frequency
Whole Space (anechoic)
FIGURE–4 Polar Response
44
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S-40 Compact Monitor
Directivity Factor Rq (Q),1,500-20,000 Hz
Median:
Enclosure Materials:
High impact polystyrene structural foam
Colors:
Specifications
Frequency Response, 1 Meter on Axis,
Swept 1/3-Octave, Anechoic
Environment … 3 dB:
9.5 (+3.8 dB, -3.6 dB)
Directivity Index Di, 2,000-20,000 Hz Me-
dian:
Black or white
Optional Accessories:
S-40MB Black, mounting bracket
S-40MB White, mounting bracket
Dimensions:
85-20,000 Hz
9.8 dB (+3.8 dB, -3.6 dB)
Transducer Complement,
High-Frequency:
2.5cm (1 inch) Tweeter
Low-Frequency:
13cm (5•1/4 inch) Woofer
Box Tuning Frequency:
75 Hz
Usable Low-Frequency Limit
(10-dB-down point):
65 Hz
24.9 cm (9.8 in.) high,
17.8 cm (7.0 in.) wide,
15.0 cm (5.9 in.) deep
Net Weight (Each):
2.6 kg (5.7 lb)
Long-Term Average Power Handling
Capacity per EIA Standard RS-426A
(see Power Handling Capacity section):
120 watts
Sound Pressure Level at 1 Meter, 1 Watt
Crossover Frequency:
3,500 Hz
Shipping Weight (Pair):
5.7 kg (12.7 lb)
Input, Anechoic Environment, Band-Lim-
ited
Impedance,
Pink Noise Signal, 300 to 2,000 Hz:
85 dB
Nominal:
4 ohms
Dispersion Angle Included by 6-dB-Down
Points on Polar Responses, Indicated One-
Third-Octave Bands of Pink Noise,
Horizontal and Vertical,
1,500-10,000 Hz:
Minimum:
3.7 ohms
100° … 25°
55
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S-40 Compact Monitor
12000 Portland Ave. South, Burnsville, MN 55337
952/884-4051 Phone, 952/884-0043 Fax
SPEAKERS–Compact Monitor
Part Number 531683 — Rev C
©Telex Communications 1999 • Litho in U.S.A.
6
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