Electro-Voice T18 Specifications

SPECIFICATIONS
Typical Axial Frequency Response (swept
one-third-octave pink noise, anechoic
environment, 4 volts at 10 feet, normalized
for 1 watt/1meter; see Figure 1):
45-250 Hz
Low-Frequency 3-dB-Down Point:
45 Hz
Usable Low-Frequency Limit
(10-dB-Down Point):
33 Hz
Half-Space Reference Efficiency:
6.0%
Long-Term Average Power-Handling
Capacity per ANSI/EIA RS-426-A 1980
(see Power-Handling Capacity section):
400 watts
Maximum Woofer Acoustic Output:
24 watts
Sensitivity (SPL at 1 meter, 1 watt input,
anechoic environment, band-limited pink
noise signal, 50 to 200 Hz):
99 dB
Dispersion Angle Included by 6-dB-Down
Points on Polar Responses:
Essentially omnidirectional
Distortion, 0.1 Full Power Input (see
Figure 2),
Second Harmonic,
100 Hz: –52 dB, 0.25%
Third Harmonic,
100 Hz: –44 dB, 0.63%
Transducer Complement:
DL18MT
Box Tuning Frequency:
38 Hz
Recommended Crossover Frequency:
250 Hz or below
Recommended Crossover Slope:
12 dB per octave
Impedance,
Nominal:
8 ohms
Minimum:
6.6 ohms
Input Connectors:
®
Two Neutrik Speakon NL4MPR-V and two
1 / -in. phone jacks, all in parallel
4
Supplied Accessory:
Neutrik Speakon ® NL4FC input cable
connector
Mounting:
Top surface contains stand mount
receptacle for use with satellite speaker
system
Materials,
Enclosure:
3
Black, carpet-covered /
4
plywood
Grille:
Black perforated metal
Enclosure Dimensions (see Figure 3),
Height:
83.3 cm (32.8 in.)
Width:
63.0 cm (24.8 in.)
Depth:
60.9 cm (24.0 in.)
Shipping Dimensions,
Height:
86.4 cm (34.0 in.)
Width:
65.5 cm (25.8 in.)
Depth:
65.5 cm (25.8 in.)
Net Weight:
49.4 kg (109 lb)
Shipping Weight:
54.0 kg (119 lb)
T18
Subwoofer
• DL18MT Manifold Technology
woofer for reliable, extended low-
frequency output
• Subwoofer for augmenting the
low-frequency performance of
EV stage systems
• Natural high-frequency roll-off
• 400-watt long-term power capacity
• Rugged, road-ready cabinet; metal
grille; black carpet finish
• Neutrik Speakon
jack inputs
3
• 1 / -inch stand mount in top allows
8
use of satellite system
DESCRIPTION
The Electro-Voice T18 is a 400-watt subwoofer
loudspeaker system which combines the at-
tributes of both horn-loaded and vented-box
designs. It utilizes the unique SubScoop
net construction with a newly revised DL18MT
woofer, as used in the Manifold Technology
concert systems. The design behaves like a
horn over much of its range, but without the time
delay and weight problems usually associated
with conventional designs. Vented-box prin-
ciples take over for the lowest octave and assist
in producing exceptionally high levels of clean,
punchy bass from a subcompact box. The
reverse woofer orientation has been used to
optimize the rear chamber volume and de-
crease the horn flare rate for extended low-end
-in. void-free performance.
The T18 can be used to augment the bass
performance of any Electro-Voice stage sys-
tem. (This may involve the use of appropriate
electronics and crossovers.) A 1
mount receptacle on the top surface of the T18
allows satellite speaker systems such as the
T52 and T22 to be used (see Figure 4).
USE IN MULTIPLES
The T18 may be used in multiples to increase
acoustic output. A 6-dB increase in maximum
acoustic output occurs when two speaker sys-
tems are placed side by side and paralleled,
yielding a 4-ohm load. For operation at very-low
frequencies, the woofer cones "mutually couple,"
acting as one system with twice the effective
cone area and power-handling capacity of a
single system. Increasing the cone area doubles
the efficiency, providing a 3-dB increase in
sound pressure level. The doubled power ca-
pacity provides the potential for an additional
3-dB gain in maximum acoustic output.
TM
® 1
and / -inch phone
4
TM
cabi-
®
3
/ -in. stand-
8