Electro-Voice 405-8H Specifications

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:
Power Rating: ............. 16 watts continuous pink noise (above
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
4-inch Full-Range
High Performance
Ceiling Loudspeakers
Voice Coil: ................................................................................ Copper
50 Hz)
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.
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