Electro-Voice 405-8H User manual

© Telex Communications, Inc. 02/2001
Part Number 38109-934 Rev A
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.
Beamwidth vs Frequency
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.
Impedance Response
Directivity and Q
Frequency Response
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)
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
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:
Frame (Basket): .......... Structurally reinforced die-cast aluminum
Cone: .......................................................................... Molded fiber
Cone Suspension: ............................. High-compliance foam surround
Specifications:
Voice Coil: ................................................................................ Copper
Voice Coil Support Material: ............................................. Kapton®**
Cone Excursion: ........................................ 0.125" max. peak to peak
Terminals:
Speaker : ............................... 5.2 mm (0.205 in.) spade lug type
Transformer: .................................................................... Pigtails
Mounting Data:
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:
405-8H: ........................................................ 2 lbs 1 oz. (0.94 kg)
405-4T: .......................................................... 2 lbs 9 oz. (1.2 kg)
Color: .......................................................................................... Black
** Kapton® is a registered trademark of DuPont.
USA 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Canada 705 Progress Avenue, Unit 46,Scarborough, Ontario, Cana a, M1H2X1,Phone: [phone], FAX: [phone]
Switzerland Keltenstrasse 11, CH-2563 IPSACH, Switzerlan , Phone: [phone]. FAX: [phone]
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], FAX: [phone]
France Parc e Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], FAX: [phone]
Australia Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: [phone], FAX: [phone]
Hong Kong Unit E & F, 21/F, Luk Hop In ustrial Bl g., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], FAX: [phone]
Japan 2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: [phone], FAX:[phone]
Singapore 3015A Ubi R 1, 05-10, Kampong Ubi In ustrial Estate, Singapore 408705, Phone: [phone], FAX: [phone]
Mexico Av. Parque Chapultepec #66-201, Col. EI. Parque E o. Mex. 53390, Phone: [phone], FAX: [phone]
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], FAX: [phone]
Africa, Mid East 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Latin America 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
www.electrovoice.com • Telex Communications, Inc. • www.telex.com

Figure 1, One-Third-Octave Polar Response Charts
Measurements were made in a 1.5 ft
3
closed enclosure.
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.
Recommended Enclosures and 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
output. The frequency response of a 405 in a typical
0.5-cubic-foot back enclosure is shown in Figure 1.
Mounting
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.
Wiring Diagam
T4-504
V07V001
W0.4 nworBdeR
W0.2 deRegnarO
W0.1 egnarOwolleY
W5.0 wolleYA/N
nommoC kcalBkcalB
smhO8 etihWetihW
nommoC kcalBkcalB
Dimensions
snoisnemiDgnitnuoMH8-504T4-504
AretemaiDrekaepsduoL).ni213.5(mm9.431).ni213.5(mm9.431
BhtpeDrekaepsduoL).ni521.2(mm0.45).ni360.4(mm2.301
C)detnuoMtnorF(retemaiDgninepOelffaB ).ni521.4(mm8.401).ni521.4(mm8.401
D)detnuoMraeR(retemaiDgninepOelffaB).ni218.3(mm8.69).ni218.3(mm8.69
EretemaiDelcriCtloB).ni57.4(mm7.021).ni57.4(mm7.021
FstolSeloHtloB).ni52.0(mm4.6x).ni02.0(mm2.5 ).ni52.0(mm4.6x).ni02.0(mm2.5
Architects’ and Engineers’ Specifications
MODEL 405-8H
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)
The loudspeaker shall be the EV (Electro-Voice®) Model
405-8H.
MODEL 405-4T
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.
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
405-4T.

Figure 1, One-Third-Octave Polar Response Charts
Measurements were made in a 1.5 ft
3
closed enclosure.
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.
Recommended Enclosures and 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
output. The frequency response of a 405 in a typical
0.5-cubic-foot back enclosure is shown in Figure 1.
Mounting
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.
Wiring Diagam
T4-504
V07V001
W0.4 nworBdeR
W0.2 deRegnarO
W0.1 egnarOwolleY
W5.0 wolleYA/N
nommoC kcalBkcalB
smhO8 etihWetihW
nommoC kcalBkcalB
Dimensions
snoisnemiDgnitnuoMH8-504T4-504
AretemaiDrekaepsduoL).ni213.5(mm9.431).ni213.5(mm9.431
BhtpeDrekaepsduoL).ni521.2(mm0.45).ni360.4(mm2.301
C)detnuoMtnorF(retemaiDgninepOelffaB ).ni521.4(mm8.401).ni521.4(mm8.401
D)detnuoMraeR(retemaiDgninepOelffaB).ni218.3(mm8.69).ni218.3(mm8.69
EretemaiDelcriCtloB).ni57.4(mm7.021).ni57.4(mm7.021
FstolSeloHtloB).ni52.0(mm4.6x).ni02.0(mm2.5 ).ni52.0(mm4.6x).ni02.0(mm2.5
Architects’ and Engineers’ Specifications
MODEL 405-8H
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)
The loudspeaker shall be the EV (Electro-Voice®) Model
405-8H.
MODEL 405-4T
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.
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
405-4T.

© Telex Communications, Inc. 02/2001
Part Number 38109-934 Rev A
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.
Beamwidth vs Frequency
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.
Impedance Response
Directivity and Q
Frequency Response
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)
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
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:
Frame (Basket): .......... Structurally reinforced die-cast aluminum
Cone: .......................................................................... Molded fiber
Cone Suspension: ............................. High-compliance foam surround
Specifications:
Voice Coil: ................................................................................ Copper
Voice Coil Support Material: ............................................. Kapton®**
Cone Excursion: ........................................ 0.125" max. peak to peak
Terminals:
Speaker : ............................... 5.2 mm (0.205 in.) spade lug type
Transformer: .................................................................... Pigtails
Mounting Data:
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:
405-8H: ........................................................ 2 lbs 1 oz. (0.94 kg)
405-4T: .......................................................... 2 lbs 9 oz. (1.2 kg)
Color: .......................................................................................... Black
** Kapton® is a registered trademark of DuPont.
USA 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Canada 705 Progress Avenue, Unit 46,Scarborough, Ontario, Cana a, M1H2X1,Phone: [phone], FAX: [phone]
Switzerland Keltenstrasse 11, CH-2563 IPSACH, Switzerlan , Phone: [phone]. FAX: [phone]
Germany Hirschberger Ring 45, D94315, Straubing, Germany, Phone: [phone], FAX: [phone]
France Parc e Courcerin, Alle Lech Walesa, Lognes, 77185 Marne La Vallee, France, Phone: [phone], FAX: [phone]
Australia Unit 23, Block C, Slough Business Park, Slough Avenue, Silverwater, N.S.W. 2128, Australia, Phone: [phone], FAX: [phone]
Hong Kong Unit E & F, 21/F, Luk Hop In ustrial Bl g., 8 Luk Hop St., San PO Kong, Kowloon, Hong Kong, Phone: [phone], FAX: [phone]
Japan 2-5-60 Izumi, Suginami-ku,Tokyo, Japan 168, Phone: [phone], FAX:[phone]
Singapore 3015A Ubi R 1, 05-10, Kampong Ubi In ustrial Estate, Singapore 408705, Phone: [phone], FAX: [phone]
Mexico Av. Parque Chapultepec #66-201, Col. EI. Parque E o. Mex. 53390, Phone: [phone], FAX: [phone]
UK 4, The Willows Centre, Willow Lane, Mitcham, Surrey CR4 4NX, UK, Phone: [phone], FAX: [phone]
Africa, Mid East 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
Latin America 12000 Portlan Ave South, Burnsville, MN 55337, Phone: [phone], FAX: [phone]
www.electrovoice.com • Telex Communications, Inc. • www.telex.com