Electro-Voice 309 series Specifications

General Product Description
®
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 309-8A/309-4T/309-8T 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 309-4T
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.
The 309-8T is features a 70.7/100-V line transformer that offers <1
dB insertion loss and a selection of 1-, 2-, 4- and 8-W taps.
These components are designed to work together as a complete
system of in-ceiling loudspeakers and accessories. They provide
wide dispersion, high-efficiency, high- maximum output, ease of
installation and wide-range reproduction of music or voice.
WB versions come complete with a pre-mounted ceiling grille.
Architects' and Engineers' Specifications
The loudspeaker shall have an 8-inch low-frequency cone radiator
and a coaxially mounted, wide-dispersion cone tweeter. The
loudspeaker shall meet the following criteria: AES power rating shall
be 16 watts of band-limited pink noise (85 Hz to 18 kHz, 6 dB crest
factor). Frequency response will be uniform from 85 Hz to 18 kHz
on both the transformer and non-transformer versions. Pressure
sensitivity, 96 dB SPL at 1 meter (94 dB at 4 feet) on axis with one
watt of band-limited pink noise from 500 Hz to 3 kHz (ref. 20 mPa).
Minimum impedance, 6.0 ohms.
Specifications:
Pressure Sensitivity: ............................................................ 96 dB SPL
(1 W, 500 Hz - 3 kHz) re: 20 µPa
Frequency Response: ................................ 85 Hz - 18 kHz (see Fig. 1)
Power-Handling Capacity: ...................................................... 16 watts
85 - 18 kHz, bandlimited pink noise, 6 dB crest factor
Impedance:
Nominal: ........................................................................... 8 ohms
Minimum: .......................................................... 6 ohms (11 kHz)
Maximum Long-Term Output: ........................................... 108 dB SPL
(16 W/1 m) re: 20 mPa)
Crossover Network: ................................................................. 3,000 Hz
with 6 dB-per-octave tweeter protection
Input Terminals: ................................................ .212-in. push terminals
309-8A - Theile-Small Parameters
Free Air Resonance, f : .............................................................. 110 Hz
s
Equivalent Volume Compliance,V
Total Q, Q : ..................................................................................... 0.94
TS
Electrical Q, Q : ............................................................................. 1.16
ES
Mechanical Q, Q : ........................................................................ 5.03
MS
: ......................................... 0.92 ft
AS
309 Series
8-inch Ceiling
Loudspeakers
The loudspeaker shall be 206.5 mm (8.13 in.) in diameter and
82.5 mm (3.25 in.) deep. Weight shall be 1.3 kg (2.8 lb) [309-8A],
1.4 kg (3.1 lb) [309-4T] and 1.45 kg (3.2 lb) [309-8T]. The 309-4T
shall have a 70-V transformer with taps at 0.5, 1, 2 and 4 watts.
The 309-8T shall have a 70-V transformer with taps at 1, 2, 4 and
8 watts. The maximum insertion loss shall be < 1.0 dB. The
loudspeakers shall be the EV (Electro-Voice
and 3098T with transformer.
Volume Displacement V
Reference Efficiency: ............................................................. 2.87%
Speaker Frame: ........................................... 22-gauge stamped steel
Finish: ........................................................................................ Black
Dimensions:
309-8A / 309-4T
Loudspeaker Diameter: ............................. 206.5 mm (8.13 in.)
Height: ........................................................... 82.6 mm (3.25 in.)
Net Weight:
309-8A: ................................................................... 1.3 kg (2.8 lb)
309-4T: ................................................................... 1.9 kg (4.1 lb)
309-8TWB: ............................................................. 2.3 kg (5.0 lb)
Shipping Weight:
309-8A: ................................................................... 1.5 kg (3.3 lb)
309-4T: ................................................................... 2.1 kg (4.6 lb)
3 309-8TWB: ............................................................. 2.5 kg (5.5 lb)
Transformer Input:
309-4T ............................................. 25/70.7 (100 volt operation)
COMMERCIAL
® ) 309SA; and 309-4T
: .................................................... 1.61 in.
D
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