Electro-Voice 405-8H, 405-4T specifications General Product Description, Specifications

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:

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

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:

96.8mm (3.812 in.) diameter (rear mounted)

104.8mm (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.