T251i T
rapezoidal Speaker System
T251i Trapezoidal Speaker System
6
SPEAKERS-Full Range/Install
Part Number 534651 — 9750
600 Cecil Street, Buchanan, MI 49107
616/695-6831, 616/695-1304 Fax
©EVI Audio 1997 • Litho in U.S.A.
Specifications
Frequency Response, Measured at
10 Feet on Axis, Swept
1
/
3
-octave,
Half-Space Anechoic Environment
(see Figure 1. Curve shown has been
normalized for 1 watt/1 meter) :
50-16,000 Hz
Low-Frequency 3-dB-Down Point:
50 Hz
Usable Low-Frequency Limit (10-dB-
down point):
45 Hz
Half-Space Reference Efficiency:
3.0%
Full range operation:
Long-Term Average Power-Handling
Capacity per EIA Standard RS-426A,
(see Power-Handling Capacity
section):
400 watts
Biamp operation:
Recommended Crossover Frequency:
1,200 Hz
Crossover Slopes,
Recommended:
24 dB per octave
Minimum:
12 dB per octave
Long-Term Average Power-Handling
Capacity (see Power-Handling Test
section),
Low Frequency
(per EIA RS-426-A 1980):
400 watts
High Frequency (per AES2-1984/
ANSI S4.26-1984):
60 watts
Sensitivity (far-field SPL referred to
1 meter, 1-watt (2.83 volts) input,
anechoic environment, band-limited
pink noise),
Low Frequency (100-800 Hz):
98 dB
High Frequency (500-5,000 Hz):
112 dB
SPL at Full Power (far-field SPL at 1
watt/1 meter referred to full power,
anechoic environment, band-limited
pink noise), Long-Term Average/Peak,
Low Frequency (100-1,200 Hz):
124 dB/130 dB
High Frequency (1,200-5,000 Hz):
129 dB/135 dB
Impedance,
Nominal (low frequency/high
frequency):
8 ohms/8 ohms
Minimum (low frequency/ high
frequency):
6.0 ohms/6.3 ohms
Nominal Efficiency,
Low Frequency: 3.0%
High Frequency: 25%
General operation:
Nominal Coverage Angle,
Horizontal: 60°
Vertical: 40°
Beamwidth (angle included by 6-dB-
down points on polar responses,
indicated one-third-octave bands of
pink noise, see Figure 4)
2,500 to 16,000 Hz Horizontal:
60° (+12°, –1°)
500 to 16,000 Hz Vertical:
40° (+2, –12°)
Directivity Factor R
θθθθθ
(Q), 500- to
16,000-Hz Median (see Figure 5):
18.0 (+8.7, –8.5)
Directivity Index D
i
, 500- to 16,000-Hz
Median (see Figure 5):
12.6 dB (+9.4 dB, –9.3 dB)
Distortion (4 W), 1% Rated Input
Power (on axis at 1 meter from
system),
Second Harmonic,
100 Hz: 0.3%
1,000 Hz: 0.4%
10,000 Hz: 1.3%
Third Harmonic,
100 Hz: 0.1%
1,000 Hz: 0.4%
10,000 Hz: 0.6%
Distortion Response (40 W), 10%
Rated Input Power (on axis at 1 meter
from system; see Figure 5),
Second Harmonic,
100 Hz: 0.7%
1,000 Hz: 1.0%
10,000 Hz: 10.0%
Third Harmonic,
100 Hz: 0.3%
1,000 Hz: 0.6%
10,000 Hz: 1.6%
Transducer Complement,
Low Frequency:
DL15ST 381-mm (15-in.)
woofer in a vented enclosure
High Frequency:
HP64M 60° x 40° horn
mounted to DH2T compression
driver
Enclosure Tuning Frequency:
55 Hz
Enclosure Internal Volume:
137 liters (4.84 cu. ft.)
Driver Protection, High Frequency:
(in biamp mode) blocking capacitor
with 800-Hz corner frequency and
6-dB-per-octave slope; (in biamp
and full-range mode) Solid-state
self-resetting circuit (PRO
TM
circuit)
drops input 6 dB
Enclosure Materials and Color:
White, 13-ply void-free Russian
birch plywood covered with a
neutral white textured paint
Grille:
Black, powder coated steel, remov-
able
Dimensions, overall (w/o rubber feet
attached),
Height:
822 mm (32.35 in.)
Width at Front:
476 mm (18.75 in.)
Width at Rear:
272 mm (10.71 in.)
Depth:
591 mm (23.25 in.)
Side-Wall Draft Angle:
10°
Net Weight:
35.5 kg (78 lb) (estimated)
Shipping Weight:
41.5 kg (91 lb) (estimated)
