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

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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.

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Contents General Product Description SpecificationsRecommended Connections Architects’ and Engineers’ SpecificationsRecommended Enclosures and Baffles MountingWiring Diagam Part Number 38109-934 Rev a

405-4T, 405-8H specifications

Electro-Voice is well-regarded in the audio industry for its innovation and quality, and the Electro-Voice 405-8H and 405-4T drivers are prime examples of the brand's commitment to delivering superior sound reproduction. The 405-8H and 405-4T are high-performance compression drivers designed to meet the demands of professional audio applications, including live sound reinforcement and installed sound systems.

The Electro-Voice 405-8H features an impressive 8-ohm impedance, making it compatible with a variety of amplifiers. With a power handling capacity of 250 watts, this driver can deliver excellent sound pressure levels without compromising clarity. The 405-4T, on the other hand, operates at a lower impedance of 4 ohms, which allows for increased power handling, reaching up to 400 watts. This makes the 405-4T particularly suitable for applications where maximum efficiency and output are paramount.

Both models utilize advanced neodymium magnet structures, which contribute to their lightweight design while maintaining high efficiency. This characteristic is especially important for touring applications where weight can significantly impact transportation and setup times. The neodymium magnets also enhance the drivers' magnetic flux, resulting in improved responsiveness and overall performance.

One of the standout features of the 405 series is the patented phase plug design. This technology minimizes phase distortion, ensuring that the sound remains true to the original source across all frequencies. Coupled with a high-frequency response that extends to 20 kHz, these drivers excel in delivering clear, articulate sound even in challenging acoustic environments.

The diaphragm construction is another area where the Electro-Voice 405 drivers shine. They utilize a lightweight yet durable diaphragm material that ensures high sensitivity and quick transient response. This results in a sound output that is both dynamic and detailed, perfect for crisp vocals and intricate instrumentals.

Furthermore, the 405-8H and 405-4T are designed with versatility in mind. They can be integrated into a wide range of cabinets and configurations, making them suitable for various applications, from large concert systems to smaller events. Their robust construction also ensures long-lasting durability, allowing for consistent performance in rigors of touring or permanent installations.

In summary, the Electro-Voice 405-8H and 405-4T drivers represent the culmination of advanced technology and quality craftsmanship. With features such as neodymium magnets, phase plug design, and durable diaphragm materials, they deliver unparalleled sound quality and reliability, making them a top choice for audio professionals worldwide.