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Electro-Voice 309-4TWB 8 inch Coaxial Ceiling Speaker (Discontinued)
Part # F.01U.144.950
Model # 309-4TWB

The Electro-Voice 309-4TWB loudspeaker is a 2-way loudspeaker with an 8" low-frequency cone and high temperature voice coil assemblies coaxially mounted with wide dispersion cone tweeters and includes a 25/70.7/100-V line transformer and a premounted white grille.

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Description

Details

The Electro-Voice 309 series loudspeaker systems are two-way loudspeakers with 8-inch low-frequency cones and high temperature voice coil assemblies coaxially mounted with wide dispersion cone tweeters. The dual magnet construction allows each speaker to be structurally, magnetically, electrically and mechanically independent of the other. The 309-4T utilize a single section crossover network, centered at 3,000 Hz, which provides 6 dB of attenuation for the tweeter outside its operating range. The 309-4TWB is provided with a 25/70.7/100-V line transformer that offers <1 dB insertion loss and a selection of 0.5-, 1-, 2- and 4-W taps and a premounted white grille. It is designed to work together as a complete system of in-ceiling loudspeakers and accessories. it provides wide dispersion, high efficiency, high- maximum output, ease of installation and wide-range reproduction of music or voice.
 
Note: This product must be ordered in multiples of 6

Features

Features

  • 8-inch low-frequency cones and high temperature voice-coil assemblies coaxially mounted with wide-dispersion cone tweeters
  • Dual magnet construction allows each speaker to be structurally, magnetically, electrically and mechanically independent of the other
  • Utilize a single section crossover network
  • The 309-4T is provided with a 25/70.7/ 100-V line transformer that offers <1 dB insertion loss and a selection of 0.5-, 1-, 2- and 4-W taps
  • Pre-mounted white grille included
Specification
Pressure Sensitivity96 dB SPL (1 W, 500 Hz - 3 kHz) re: 20 μPa
Frequency Response85 Hz - 18 kHz
Power-Handling Capacity16W 85 - 18 kHz, band limited pink noise, 6 dB crest factor
ImpedanceNominal: 8 ohms; Minimum: 6 ohms (11 kHz)
Maximum Long-Term Output108 dB SPL (16 W/1 m) re: 20 mPa)
Crossover Network3,000 Hz with 6 dB-per-octave tweeter protection
Input Terminals0.212" push terminals
Equivalent Volume Compliance, VAS0.92 ft
Total Q, QTS0.94
Electrical Q, QES1.16
Mechanical Q, QMS5.03
Volume Displacement1.61"
Reference Efficiency2.87%
Speaker Frame22-gauge stamped steel
Transformer Input25/70.7 (100 volt operation)
Net Weight5 lbs (2.3 kg)
Shipping Weight5.5 lbs (2.5 kg)
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