405 Series
4-inch Full-Range
High Performance
Ceiling Loudspeakers
COMMERCIAL
General Product Description
The EV (Electro-Voice®) Model 405-8H and 405-4T
loudspeakers are compact 4" speakers that provide the
utmost in performance obtainable from speakers of this size.
Clear, intelligible speech and good music reproduction are
ensured because of the extended 60 - 15,000 Hz range.
The loudspeaker has an 8-ohm voice coil.The model 405-4T
has a factory mounted matching transformer allowing the
loudspeaker to be run from 70.7 V or 100 V transmission
lines, drawing 0.5, 1, 2, or 4 watts.
These quality loudspeakers are designed for continuous,
trouble-free service. The die cast aluminum frame houses
a magnetic structure fabricated of heavy gauge steel. The
small size of the speakers allows either front or rear
mounting in walls, partitions, ceilings, and into volumes as
low as 0.1 cubic feet.
Specifications:
Voice Coil: ................................................................................ Copper
Voice Coil Support Material: ............................................. Kapton®**
Cone Excursion: ........................................ 0.125" max. peak to peak
Terminals:
Power Rating: ............. 16 watts continuous pink noise (above 50 Hz)
Frequency Response: ...................................................60 - 15,000 Hz
Pressure Sensitivity: ........................................................... 90 dB SPL
measured at one meter on axis with 1 watt input of pink noise, band-limited
from 500 - 3000 Hz (Ref.: 20 µPa)
Speaker :............................... 5.2 mm (0.205 in.) spade lug type
Transformer: .................................................................... Pigtails
Mounting Data:
Maximum SPL: .................................................. 102 dB for 16W @ 1M
Impedance: .................................................................................8 ohms
70.7/100 Volt Taps: ................................ 0.5, 1, 2, 4 watts (405-4T only)
Insertion Loss: ............................................ 1.0 dB max. (405-4T only)
Transformer Frequency Response: ............... 1 dB, 100 - 10,000 Hz
........................................................................................... (405-4T only)
Nominal Free-Air Cone Resonance: ........................................ 120 Hz
Nominal Distribution Pattern: ......................................................... 90°
*Distribution Pattern With Polar to Planer Correction:
107' at 2 kHz 69' at 4 kHz
Baffle Opening:
96.8 mm (3.812 in.) diameter (rear mounted)
104.8 mm (4.125 in.) diameter (front mounted)
Mounting Bolt Centers:
4 equally spaced slots 90° apart on 120.7 mm (4.75 in.) diameter
circle
Dimensions:
Diameter: ................................................... 134.9 mm (5.312 in.)
405-8H: ...............................................54.0 mm (2.125 in.) depth
405-4T: .............................................103.2 mm (4.063 in.) depth
Weight:
Voice Coil Diameter: .................................................. 25.4 mm (1.0 in.)
Magnet Structure:
Magnet Type: ....................................................................... Ferrite
Magnet Weight: ............................................................ 9.4 ounces
Flux Density: .................................................................. 1.05 tesla
Construction:
405-8H: ........................................................ 2 lbs 1 oz. (0.94 kg)
405-4T: .......................................................... 2 lbs 9 oz. (1.2 kg)
Color: .......................................................................................... Black
Frame (Basket):.......... Structurally reinforced die-cast aluminum
Cone: .......................................................................... Molded fiber
Cone Suspension: ............................. High-compliance foam surround
** Kapton® is a registered trademark of DuPont.
Architects’ and Engineers’ Specifications
MODEL 405-4T
MODEL 405-8H
The loudspeaker shall meet the following performance and
structural criteria.Power rating, 4 watts.Frequency response,
uniform from 60 to 15,000 Hz.Pressure sensitivity, 90 dB-SPL
when measured at one meter on axis with 1 watt input of
bandlimited pink noise from 500 to 300 kHz (Ref.: 20 uPa).
Impedance, 8 ohms. Nominal free-air cone resonance, 90
Hz.The voice coil shall have a diameter of 1" and shall operate
in a magnetic field of 1.05 tesla derived from a ferrite (V)
magnet weighing at least 9.4 ounces. The loudspeaker shall
be able to perform efficiently in a volume as low as 0.1 cubic
feet. The loudspeaker frame shall be of die cast aluminum
construction.The speaker terminals shall be of the spade lug
type. Dimensions, 5.312" diameter x 4.063" deep. Weight, 2
pounds, 9 ounces.
The loudspeaker shall meet the following performance and
structural criteria.Power rating, 16 watts.Frequency response,
uniform from 60 - 15,000 Hz. Pressure sensitivity, 90 dB-SPL
when measured at one meter on axis with 1 watt input of
band-limited pink noise from 500 to 3000 Hz (Ref.: 20 µPa).
Impedance, 8 ohms. Nominal free-air cone resonance, 90
Hz.The voice coil shall have a diameter of 1" and shall operate
in a magnetic field of 1.05 tesla derived from a Ferrite (V)
magnet weighing at least 9.4 ounces. The loudspeaker shall
be able to perform efficiently in a volume as low as 0.1 cubic
feet. The loudspeaker frame shall be of die cast aluminum
construction.The speaker terminals shall be of the spade lug
type. Dimensions, 5.312" diameter x 2.125" deep. (See page
2)
A 70/25-volt line transformer shall be incorporated for use in
distributed systems, and shall have a frequency response of
+1 dB from 100 to 10,000 Hz, with maximum insertion loss
of 1.0 dB and primary wattage taps of 4, 2, 1 and 0.5 watts.
The loudspeaker shall be the EV (Electro-Voice®) Model
405-8H.
The loudspeaker shall be the EV (Electro-Voice®) Model
405-4T.
Recommended Connections
The 405-8H is a nominal 8-ohm impedance loudspeaker with
a 16-watt input capability.The 405-4T utilizes an 4-watt, 70.7-,
100-volt universal line-matching transformer with power taps
ranging from 1 to 4 watts.
output. The frequency response of a 405 in a typical
0.5-cubic-foot back enclosure is shown in Figure 1.
Mounting
Recommended Enclosures and Baffles
The 405 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, as shown
below. Normal fasteners up to 5 mm (0.20 in.) will fit through
the four holes in the frame.The 405 is designed for mounting
on standard ceiling speaker baffles.
The 405-8H, 405-4T 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
Mounting Dimensions
405-8H
134.9 mm (5.312 in.)
54.0 mm (2.125 in.)
405-4T
134.9 mm (5.312 in.)
103.2 mm (4.063 in.)
104.8 mm (4.125 in.)
96.8 mm (3.812 in.)
A
B
C
D
E
F
Loudspeaker Diameter
Loudspeaker Depth
Baffle Opening Diameter (Front Mounted)
Baffle Opening Diameter (Rear Mounted)
Bolt Circle Diameter
104.8 mm (4.125 in.)
96.8 mm (3.812 in.)
120.7 mm (4.75 in.)
120.7 mm (4.75 in.)
Bolt Hole Slots
5.2 mm (0.20 in.) x 6.4 mm (0.25 in.)
5.2 mm (0.20 in.) x 6.4 mm (0.25 in.)
Dimensions
Frequency Response
Impedance Response
Beamwidth vs Frequency
Directivity and Q
USA
12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-884-4051, FAX: 952-884-0043
Canada
Switzerland
Germany
France
Australia
Hong Kong
Japan
705 Progress Avenue, Unit 46,Scarborough, Ontario, Canada, M1H2X1,Phone: 416-431-4975, 800-881-1685, FAX: 416-431-4588
Keltenstrasse 11, CH-2563 IPSACH, Switzerland, Phone: 41/32-331-6833. FAX: 41/32-331-1221
Hirschberger Ring 45, D94315, Straubing, Germany, Phone: 49 9421-706 392, FAX: 49 9421-706 287
Parc de Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: 33/1-6480-0090, FAX: 33/1-6480-4538
Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: 61/2-9648-3455, FAX: 61/2-9648-5585
Unit E & F, 21/F, Luk Hop Industrial Bldg., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: 852-2351-3628, FAX: 852-2351-3329
2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: 81-3-3325-7900, FAX:81-3-3325-7789
U.S.A. and Canada only.
For customer orders, contact the Customer Service department at
800/392-3497 Fax: 800/955-6831
For warranty repair or service information, contact the Service
Repair department at 800/685-2606
Singapore
Mexico
UK
3015A Ubi Rd 1, 05-10, Kampong Ubi Industrial Estate, Singapore 408705, Phone: 65-746-8760, FAX: 65-746-1206
Av. Parque Chapultepec #66-201, Col. EI. Parque Edo. Mex. 53390, Phone: (52) 5358-5434, FAX: (52) 5358-5588
4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: 44 181 640 9600, FAX: 44 181 646 7084
Africa, Mid-East 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7424, FAX: 952-887-9212
Latin America 12000 Portland Ave South, Burnsville, MN 55337, Phone: 952-887-7491, FAX: 952-887-9212
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.
© Telex Communications, Inc. 02/2001
Part Number 38109-934 Rev A
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