Data Sheet

DL15X
Low-Frequency
Reproducer
• Woofer for two-way speech and
music systems
• High excursion for low-frequency
clarity and punch
• TIR
TM
& FDD
TM
reduce distortion,
keep voice coil cool, and smooth
frequency response
• 400 watts long-term power capacity
• 101-dB sensitivity
• Thermally efficient magnet assem-
bly for high reliability
• PROTEF
TM
coating helps protect
woofer from excessive power peaks
Typical Amplifier Size (see Typical
Amplifier Size section):
400-800 watts
Mounting Information (see Mounting
section),
Bolt-Hole Diameter
(eight evenly spaced holes):
7.1 mm (0.28 in.)
Bolt Circle Diameter:
371 mm (14.60 in.)
Baffle Opening Diameter
(front or rear mounting):
353 mm (13.90 in.)
Electrical Connections (see Electrical
Connectors section),
Connector Type:
Push terminals for bare wires
Polarity:
A positive voltage applied to the positive
(red) terminal produces a positive
pressure at the front of the cone
Additional Descriptive Information,
Magnet Weight:
2.2 kg (4.9 lb)
Magnet Material:
Barium ferrite
Frame:
Cast aluminum
Frame Finish:
Textured black epoxy
Plating of Steel Parts:
Bright Cadmium
Voice-Coil Material:
Aluminum
Voice-Coil Insulation:
Polyimide 220 °C rating
Voice-Coil Form:
Polyimide
Back Cover:
Black, advanced synthetic elastomer
Optional Accessories:
SMH-1 mounting hardware kit
SPECIFICATIONS
Usable Axial Frequency Response in Typical
Enclosure (4.0 ft
3
tuned to 40 Hz), Swept One-
Third-Octave Pink Noise, 4 Volts at 10 Feet,
Anechoic Environment, Normalized for 1
Watt/1 Meter (see Figure 1):
1
45-3,000 Hz
Power Handling (see Power-Handling
Test section),
Per ANSI/EIA RS-426-A 1980:
400 watts
Per AES2-1984/ANSI S4.26-1984,
50-500 Hz: 400 watts
100-1,000 Hz: 500 watts
Sensitivity (SPL at 1 m, 1 watt input power,
nominal impedance),
200- to 3,000-Hz Average:
101 dB
100- to 800-Hz Average:
98 dB
Impedance Response (see Figure 4 for
response in typical enclosure; see Figure 3
for response in standard baffle),
Minimum (Z
min
):
6.5 ohms at 230 Hz
Nominal:
8 ohms
Distortion Response (on axis in standard
baffle, 10% rated input power; see Figure 5),
Second Harmonic,
100 Hz: –21 dB (8.9%)
1,000 Hz: –38 dB (1.3%)
Third Harmonic,
100 Hz: –31 dB (2.8%)
1,000 Hz: –40 dB (1.0%)
Beamwidth (angle included by 6-dB-down
points on polar responses for octave
bands of pink noise; see Figure 6),
500 Hz: 80°
1,000 Hz: 80°
2,000 Hz: 60°
Physical Constants,
Effective Piston Diameter:
330.0 mm (13.0 in.)
Moving Mass (M
MD
):
0.062 kg (0.137 lb)
Voice-Coil Winding Depth:
15.2 mm (0.6 in.)
Voice-Coil Diameter:
63.5 mm (2.5 in.)
Voice-Coil Winding Length:
18.1 m (59.4 ft)
Top Plate Thickness at Voice Coil:
10.9 mm (0.43 in.)
BL Factor:
20 tesla meter
Thiele-Small Parameters (broken in),
f
s
: 42.0 Hz
V
AS
: 195 liters (6.89 ft
3
)
Q
ES
: 0.30
Q
MS
: 4.55
Q
TS
: 0.28
R
E
: 6.0 ohms
ηη
ηη
η
0
: 4.63%
S
D
: 0.086 m
2
(132 in.
2
)
M
MD
: 0.062 kg (0.137 lb)
L
E
: 1.6 mH
C
MS
: 0.19 mm/N
R
MS
: 4.43 mechanical ohms
P
E
(max) (per ANSI/EIA RS-426-A 1980):
400 watts
X
max
2
: 4.1 mm (0.16 in.)
X
lim
3
: 12.7 mm (0.50 in.)
V
D
(S
D
x X
max
): 3.53 liters (0.012 ft
3
)
Thermal Rise after Power Test:
82 °C (180 °F)
Typical Vented Enclosures (see Typical
Enclosures section):
4.0 ft
3
tuned to 40 Hz or 6.0 ft
3
tuned to 35 Hz
_________________________
1. For swept-sine-wave response in standard baffle, per
AES2-1984/ANSI S4.26-1984, see Figure 2.
_________________________
2. X
max
is the one-way peak excursion which produces 10%
THD of the current waveform when driven at f
s
.
3. Displacement limit is the one-way peak excursion which,
when exceeded, will cause physical damage to the drive
mechanism.