Брошюра для Electrovoice 205-4t

8

A 4-inch, compact 4-watt full-range high performance ceiling loudspeaker.This model offers an

extended 60-15,000 Hz range, ensuring clear, intelligible speech and good music reproduction.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. Model 405-4T has a factory-mounted matching transformer allowing the loudspeaker to 

be run from 70.7-volts or 100-volt transmission lines, drawing 0.5, 1, 2 or 4 watts.

Same as 405-4T without factory-mounted transformer. 8-ohm impedance, 16 watts.

The PRO-8A is accurate, highly intelligible and musical sounding loudspeaker that is well suited for the

reproduction of both voice and music.The PRO-8A employs an unusually large 1-1/2-inch voice coil.

This provides increased apex-driving-point cone area and greater thermal capabilities.The result is higher

acoustic power output than other brands, which translates into unmatched durability and reliability at lower

levels. High frequencies are reproduced by a 1-1/2-inch piezoelectric tweeter that is mounted directly 

to the pole piece of the woofer. The tweeter being mounted to a stationary surface at the apex 

of the woofer minimizes intermodulation distortion and allows for improved time alignment over other

coaxial ceiling speaker designs. An acoustically transparent dust dome mounted on the woofer cone

encapsulates the tweeter offering excellent dust protection for both the woofer voice coil and the tweeter.

The PRO-8A series of speakers may be used in ported enclosures where improved low-frequency

response is desired. Placing the loudspeaker in an enclosure of 1.0 cubic foot with a box-tuning

frequency of 75 Hz will yield a –3 dB point of 80 Hz. An 80 Hz tuning may be obtained with a port

having an area of 7.0 square inches and a length of 0.75 inches.

Same as PRO-8A except it comes with a 70.7/100-volt line transformer offering 

a selection of 0.62-, 1.25-, 2.5- and 5-watt taps.

Same as PRO-8A except it comes with a 70.7/100-volt line transformer offering 

a selection of 3.75-, 7.5-, 15- and 30-watt taps.

10 W

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16 W

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30 W

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90-18,000 Hz

90-18,000 Hz

90-18,000 Hz

60-15,000 Hz

60-15,000 Hz

82-16,000 Hz

82-16,000 Hz

82-16,000 Hz

91 dB

91 dB

91 dB

90 dB

90 dB

96 dB

96 dB

96 dB

101 dB

101 dB

101 dB

102 dB

102 dB

110 dB

110 dB

110 dB

8 ohms

0.25, 0.5, 1,2,4

1, 2, 4, 8

8 ohms

0.5, 1, 2, 4

8 ohms

0.62, 1.25, 2.5, 5

3.75, 7.5, 15, 30

2.2 in. (56 mm)

3.7 in. (94 mm)

3.7 in. (94 mm)

2.12 in. (54 mm)

4.06 in. (103.2 mm) 3.15 in. (80 mm)

3.15 in. (80 mm)

3.15 in. (80 mm)

2 lb. (0.9 kg)

2.8 lb. (1.26 kg)

2.8 lb. (1.26 kg)

2.1 lb. (0.94 kg)

2.9 lb. (1.2 kg)

2.7 lb. (1.2 kg)

3.1 lb. (1.4 kg)

3.1 lb. (1.4 kg)

A 4-inch, 10-watt continuous full-range speaker. An acoustically transparent dome encloses 

a small, centrally mounted free-edge cone that is used to improve high-frequency dispersion.

Suitable for applications requiring highly intelligible speech or smooth musical reproduction.

This model includes an 8-watt transformer, allowing connections to 70.7/100-volt line, with taps 

of 1, 2, 4 and 8 watts.

Same as 205-8T except with a 4-watt transformer, allowing connections to 

25-, 70.7-, 100-volt line, with taps of 0.5 to 4 watts.

Same as 205-8T without factory-mounted transformer. 8-ohm impedance, 10 watts.

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