© 2008 directed electronics—all rights reserved
15
SPECIFICATIONS
Model/Part Number
XTR124
XTR152
XTR154
Thiele/Small Parameters
Fs (free-air resonance, Hz)
23.7
21.4
23.0
Vas (equivalent compliance, cu. ft.)
2.606
6.141
5.618
Vas (equivalent compliance, liters)
73.820
173.960
159.140
Qms (Q, mechanical)
6.15
6.93
6.53
Qes (Q, electrical)
0.53
0.61
0.73
Qts (total driver Q)
0.49
0.56
0.66
Re (DC resistance, ohms)
7.9
4.2
7.9
Z (nominal impedance, ohms)
8
4
4
Le (inductance, mh)
2.87
1.70
2.55
Efficiency (1W @ 1M, dB)
84.5
86.3
86.0
Xmax (one way linear excursion, in.)
0.476
0.487
0.476
Xmax (one way linear excursion, mm)
12.075
12.363
12.075
Pe (continuous power handling, watts)
250
300
300
Peak power handling (music, watts) *
500
600
600
Mms (total moving mass, grams)
162.76
272.53
259.04
Cms (mechanical compliance, mm/N)
0.278
0.203
0.185
Bl (motor strength, Tesla-M)
18.90
14.36
18.14
Sd (effective radiating area, sq. cm.)
433.736
779.311
779.311
Sd (effective radiating area, sq. in.)
67.255
120.839
120.839
Frequency range (Hz)
20-250
20-250
20-250
Energy Bandwidth Product (EBP) **
45
35
31
Driver Physical Dimension
Speaker Displacement (cu ft)
0.077
0.143
0.143
Speaker Outer Diameter (inches/mm)
277.00
345.00
345.00
Mounting hole diameter (inches/mm)
10.91
13.58
13.58
Mounting depth (inches/mm)
5.98/152
7.24/184
7.24/184
Magnet Weight (Oz)
64.00
64.00
64.00
Basket diameter (inches/mm)
12.24
15.12
15.12
Recommended Enclosures
Typical sealed enclosure (cu. ft.)
1.50
2.00
2.00
Vented enclosure (cu. ft.) ***
1.50
3.00
3.00
Port tuning frequency (Hz)
40.00
36.00
36.00
Port diameter (inside, inches)
4.00
4.00
4.00
Port square equivalent (inches)
3.545 x 3.545
3.545 x 3.545
3.545 x 3.545
Port length (inches)
11.26
5.42
5.42
Specifi cations are subject to change without notice
