Electro-Voice 205 Series User manual

© Telex Communications, Inc. 02/2001
Part Number 38109-862 A
205 Series
4-Inch Full-Range
Ceiling Loudspeakers
COMMERCIAL
General Product Description
The Electro-Voice® 205 is a high quality 4-inch, full-range
loudspeaker for distributed sound systems.
An acoustically transparent dome encloses a small, centrally
mounted free-edge cone which is used to improve
high-frequency dispersion.
The 205 is suitable for use in applications requiring highly
intelligible speech or smooth musical reproduction.
To ensure long-term reliability in installations, the 205-8A is
designed to handle 10 watts continuous power (40 watts
peak) of shaped white noise for eight hours per EIA Standard
RS-426A 1980.
The 205-4T includes a 4 watt transformer, allowing
connection to 25/70.7/100- volt line, with taps of 0.5 to 4
watts.
The 205-8T includes an 8 watt transformer, allowing
connection to 70.7/100- volt line, with taps of 1 to 8 watts.
Architects’ and Engineers’ Specifications
The loudspeaker shall be a ceiling loudspeaker with a
nominal diameter of 128 mm (5.1 in.), an overall depth of
56 mm (2.2 in.) for the 205 and 94 mm (3.7 in.) for the 205-
4T, and shall weigh no more than 0.9 kg (2.0 lb) for the 205,
1.3 kg (2.8 lb) for the 205-8T. The voice coil shall have a
nominal diameter of 25.4 mm (1.0 in.) and length of 7.6 mm
(0.3 in.) and shall operate in a gap of not less than 1.0 T
(10,000 Gauss).
The loudspeaker shall exhibit a sensitivity (SPL, 1 watt at 1
meter (3.28 ft) averaged (200 - 4,000 Hz) of no less than 91
dB on axis maintaining an essentially flat frequency
response with 3 dB-down points at 65 Hz and 16,000 Hz in
a two-cubic-foot sealed box in a free field. The half-space
reference efficiency shall be 0.8%.The nominal impedance
shall be 8 ohms and the dc resistance shall be 6.5 ohms.
The loudspeaker shall be capable of handling a continuous
10-watt (8.6 volts true RMS) shaped white-noise signal (as
per EIA Standard RS-426A 1980) with a 6-dB crest factor
for eight hours.
The loudspeaker shall be the model 205-8A. When fitted
with a transformer that allows connection to 25/70.7/ 100-volt
systems of 0.5 to 4 watts, the loudspeaker shall be referred
to as the model 205-4T. When fitted with a transformer that
allows connection to 70.7/100-volt systems of 1 to 8 watts,
the loudspeaker shall be referred to as the model 205-8T.
Frequency Response: 90 - 18,000 Hz, ±5 dB (see last page)
Power-Handling Capacity: .......................................... 10 watts
(per EIA RS-426-A 1980 (85 - 15,000 Hz bandlimited pink noise,
6-dB crest factor):
Impedance:
Nominal: .................................................................. 8 ohms
Minimum: ............................................... 6.7 ohms (230 Hz)
Sound Pressure Level: ................................................... 91 dB
(at 1 Meter, 1 Watt Input, 200 - 4,000 Hz Average)
Maximum SPL: ....................................... 101 dB for 10W @ 1M
Voice-Coil Diameter: ...................................... 25.4 mm (1.0 in.)
Magnet Weight: ............................................... 0.32 kg (0.72 lb)
Magnet Material: ................................................. Barium Ferrite
Flux Density: ............................................................... 1.0 Tesla
Speaker Frame: .................................. 22-gauge stamped steel
Frame Color: ...................................................................... Black
Dimensions:
205-8A / 205-4T / 205-8T
Diameter: ................................................... 206 mm (8.1 in.)
Height:
205-8A .......................................................... 56 mm (2.2 in.)
205-4T / 205-8T: .......................................... 94 mm (3.7 in.)
Net Weight:
205-8A: ........................................................... 0.9 kg (2.0 lb)
205-4T / 205-8T: ............................................ 1.3 kg (2.8 lb)
Transformer Input:
205-4T ................... 25 or 70.7 volt line (100 volt operation)
205-8T ............................. 70.7 volt line (100 volt operation)
Specifications:
Axial Frequency Response
(1 watt / 1 meter) Input Impedance vs. Frequency
Beamwidth vs Frequency Directivity and Q
U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392 3497 Fax: [phone]
For warranty repair or service information, contact the Service
Repair department at 800/685 2606
For technical assistance, contact Technical Support at 866/78 AUDIO
Please refer to the Engineering Data Sheet for warranty information.
Specifications subject to change without notice.
USA 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-884-0043
Canada 705 Progress venue, Unit 46,Scarborough, Ontario, Canada, M1H2X1,Phone: [phone], F X: 416-431-4588
Switzerland Keltenstrasse 11, CH-2563 IPS CH, Switzerland, Phone: [phone]. F X: 41/32-331-1221
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], F X: 49 9421-706 287
France Parc de Courcerin, lle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], F X: 33/1-6480-4538
Australia Unit 23, Block C, Slough Business Park, Slough venue, Silverwater, N.S.W. 2128, ustralia, Phone: [phone], F X: 61/2-9648-5585
Hong Kong Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], F X: 852-2351-3329
Japan 2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: [phone], F X:81-3-3325-7789
Singapore 3015 Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: [phone], F X: 65-746-1206
Mexico v. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: [phone], F X: (52) 5358-5588
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], F X: 44 181 646 7084
Africa, Mid East 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-887-9212
Latin America 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-887-9212
www.electrovoice.com • Telex Communications, Inc. • www.telex.com

Mounting DiagramWiring Diagram
Recommended Connections
The 205 is a nominal 8-ohm impedance loudspeaker with a
10-watt input capability.The 205-4T utilizes a 4-watt, 25/70.7/
100-volt universal line matching transformer with power taps
ranging from 0.50 to 4 watts.The 205-8T utilizes an 8-watt,
70.7/100-volt universal line matching transformer with power
taps ranging from 1 to 8 watts.The transformer is mounted to
the frame and the primary winding is accessible for the user
to select any of the power taps indicated in the following table
for 205-4T. For use with 100-V lines, connect to the 70.7 V
primary winding, and use the table below to determine the
wattage ratings of various secondary winding taps. Do not
use the tap marked 4 W.
All wattages marked for the various taps refer to the load on
the amplifier, with the insertion loss of the transformer being
less than 1.0 dB.
Recommended Enclosures and Baffles
The 205-8A, 205-4T, and 205-8T are designed to fit on
standard 4-inch ceiling speaker baffles. Additionally, these
loudspeakers will accommodate the use of any standard back
enclosure with a diameter of 5.5 inches or greater and a depth
of at least 4.5 inches. Larger back volumes will increase the
low-frequency output. The frequency response of a 205 in a
typical 1.0-cubic-foot and 1.8-cubic-foot back enclosure are
shown on the last page.
Mounting
The 205 may be front- or rear-mounted against either surface
of its mounting flange and requires a 110 mm (4.35 in.)
diameter cutout and a 120 mm (4.72 in.) bolt circle. Normal
fasteners up to 5 mm (0.20 in.) will fit through the eight holes
in the frame. The 205 is designed for mounting on standard
ceiling speaker baffles.
Dimensions
Polar Response in 1.8 ft
3
Sealed box 4 volt RMS of 1/3 octave
Band Limited Noise in Anechoic Environment, 20 feet on Axis.
T4-502
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Mounting DiagramWiring Diagram
Recommended Connections
The 205 is a nominal 8-ohm impedance loudspeaker with a
10-watt input capability.The 205-4T utilizes a 4-watt, 25/70.7/
100-volt universal line matching transformer with power taps
ranging from 0.50 to 4 watts.The 205-8T utilizes an 8-watt,
70.7/100-volt universal line matching transformer with power
taps ranging from 1 to 8 watts.The transformer is mounted to
the frame and the primary winding is accessible for the user
to select any of the power taps indicated in the following table
for 205-4T. For use with 100-V lines, connect to the 70.7 V
primary winding, and use the table below to determine the
wattage ratings of various secondary winding taps. Do not
use the tap marked 4 W.
All wattages marked for the various taps refer to the load on
the amplifier, with the insertion loss of the transformer being
less than 1.0 dB.
Recommended Enclosures and Baffles
The 205-8A, 205-4T, and 205-8T are designed to fit on
standard 4-inch ceiling speaker baffles. Additionally, these
loudspeakers will accommodate the use of any standard back
enclosure with a diameter of 5.5 inches or greater and a depth
of at least 4.5 inches. Larger back volumes will increase the
low-frequency output. The frequency response of a 205 in a
typical 1.0-cubic-foot and 1.8-cubic-foot back enclosure are
shown on the last page.
Mounting
The 205 may be front- or rear-mounted against either surface
of its mounting flange and requires a 110 mm (4.35 in.)
diameter cutout and a 120 mm (4.72 in.) bolt circle. Normal
fasteners up to 5 mm (0.20 in.) will fit through the eight holes
in the frame. The 205 is designed for mounting on standard
ceiling speaker baffles.
Dimensions
Polar Response in 1.8 ft
3
Sealed box 4 volt RMS of 1/3 octave
Band Limited Noise in Anechoic Environment, 20 feet on Axis.
T4-502
V52V07V001
W0.4 nworBwolleYneerG
W0.2 deRneerGeulB
W0.1 egnarOeulBteloiV
W50. wolleYteloiVA/N
nommoC kcalBkcalBkcalB
smhO8 etihWetihWetihW
nommoC kcalBkcalBkcalB
T8-502
V07V001
W0.8 nworBdeR
W0.4 deRegnarO
W0.2 egnarOwolleY
W0.1 wolleYA/N
nommoC kcalBkcalB
smhO8 etihWetihW
nommoC yerGyerG

© Telex Communications, Inc. 02/2001
Part Number 38109-862 A
205 Series
4-Inch Full-Range
Ceiling Loudspeakers
COMMERCIAL
General Product Description
The Electro-Voice® 205 is a high quality 4-inch, full-range
loudspeaker for distributed sound systems.
An acoustically transparent dome encloses a small, centrally
mounted free-edge cone which is used to improve
high-frequency dispersion.
The 205 is suitable for use in applications requiring highly
intelligible speech or smooth musical reproduction.
To ensure long-term reliability in installations, the 205-8A is
designed to handle 10 watts continuous power (40 watts
peak) of shaped white noise for eight hours per EIA Standard
RS-426A 1980.
The 205-4T includes a 4 watt transformer, allowing
connection to 25/70.7/100- volt line, with taps of 0.5 to 4
watts.
The 205-8T includes an 8 watt transformer, allowing
connection to 70.7/100- volt line, with taps of 1 to 8 watts.
Architects’ and Engineers’ Specifications
The loudspeaker shall be a ceiling loudspeaker with a
nominal diameter of 128 mm (5.1 in.), an overall depth of
56 mm (2.2 in.) for the 205 and 94 mm (3.7 in.) for the 205-
4T, and shall weigh no more than 0.9 kg (2.0 lb) for the 205,
1.3 kg (2.8 lb) for the 205-8T. The voice coil shall have a
nominal diameter of 25.4 mm (1.0 in.) and length of 7.6 mm
(0.3 in.) and shall operate in a gap of not less than 1.0 T
(10,000 Gauss).
The loudspeaker shall exhibit a sensitivity (SPL, 1 watt at 1
meter (3.28 ft) averaged (200 - 4,000 Hz) of no less than 91
dB on axis maintaining an essentially flat frequency
response with 3 dB-down points at 65 Hz and 16,000 Hz in
a two-cubic-foot sealed box in a free field. The half-space
reference efficiency shall be 0.8%.The nominal impedance
shall be 8 ohms and the dc resistance shall be 6.5 ohms.
The loudspeaker shall be capable of handling a continuous
10-watt (8.6 volts true RMS) shaped white-noise signal (as
per EIA Standard RS-426A 1980) with a 6-dB crest factor
for eight hours.
The loudspeaker shall be the model 205-8A. When fitted
with a transformer that allows connection to 25/70.7/ 100-volt
systems of 0.5 to 4 watts, the loudspeaker shall be referred
to as the model 205-4T. When fitted with a transformer that
allows connection to 70.7/100-volt systems of 1 to 8 watts,
the loudspeaker shall be referred to as the model 205-8T.
Frequency Response: 90 - 18,000 Hz, ±5 dB (see last page)
Power-Handling Capacity: .......................................... 10 watts
(per EIA RS-426-A 1980 (85 - 15,000 Hz bandlimited pink noise,
6-dB crest factor):
Impedance:
Nominal: .................................................................. 8 ohms
Minimum: ............................................... 6.7 ohms (230 Hz)
Sound Pressure Level: ................................................... 91 dB
(at 1 Meter, 1 Watt Input, 200 - 4,000 Hz Average)
Maximum SPL: ....................................... 101 dB for 10W @ 1M
Voice-Coil Diameter: ...................................... 25.4 mm (1.0 in.)
Magnet Weight: ............................................... 0.32 kg (0.72 lb)
Magnet Material: ................................................. Barium Ferrite
Flux Density: ............................................................... 1.0 Tesla
Speaker Frame: .................................. 22-gauge stamped steel
Frame Color: ...................................................................... Black
Dimensions:
205-8A / 205-4T / 205-8T
Diameter: ................................................... 206 mm (8.1 in.)
Height:
205-8A .......................................................... 56 mm (2.2 in.)
205-4T / 205-8T: .......................................... 94 mm (3.7 in.)
Net Weight:
205-8A: ........................................................... 0.9 kg (2.0 lb)
205-4T / 205-8T: ............................................ 1.3 kg (2.8 lb)
Transformer Input:
205-4T ................... 25 or 70.7 volt line (100 volt operation)
205-8T ............................. 70.7 volt line (100 volt operation)
Specifications:
Axial Frequency Response
(1 watt / 1 meter) Input Impedance vs. Frequency
Beamwidth vs Frequency Directivity and Q
U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392 3497 Fax: [phone]
For warranty repair or service information, contact the Service
Repair department at 800/685 2606
For technical assistance, contact Technical Support at 866/78 AUDIO
Please refer to the Engineering Data Sheet for warranty information.
Specifications subject to change without notice.
USA 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-884-0043
Canada 705 Progress venue, Unit 46,Scarborough, Ontario, Canada, M1H2X1,Phone: [phone], F X: 416-431-4588
Switzerland Keltenstrasse 11, CH-2563 IPS CH, Switzerland, Phone: [phone]. F X: 41/32-331-1221
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], F X: 49 9421-706 287
France Parc de Courcerin, lle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], F X: 33/1-6480-4538
Australia Unit 23, Block C, Slough Business Park, Slough venue, Silverwater, N.S.W. 2128, ustralia, Phone: [phone], F X: 61/2-9648-5585
Hong Kong Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], F X: 852-2351-3329
Japan 2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: [phone], F X:81-3-3325-7789
Singapore 3015 Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: [phone], F X: 65-746-1206
Mexico v. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: [phone], F X: (52) 5358-5588
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], F X: 44 181 646 7084
Africa, Mid East 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-887-9212
Latin America 12000 Portland ve South, Burnsville, MN 55337, Phone: [phone], F X: 952-887-9212
www.electrovoice.com • Telex Communications, Inc. • www.telex.com