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8½” High Performance Steel Frame Subwoofer Unit.
Suitable for dedicated subwoofer applications and as low frequency transducer in 2½-, 3- and multi-way speaker systems.
- Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
- Large linear stroke, ensuring low distortion at high output levels
- Rigid air-dried paper cone to ensure piston motion even at high levels - for reduced distortion
- Rigid steel chassis with extensive venting for lower air flow speed reducing audible distortion
- Vented center pole with dual flares for reduced noise level at large cone excursions
- Heavy-duty fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor structure for better control and power handling
- Built-in alu field-stabilizing ring for reduced distortion at high levels
- Low-loss suspension (high Qm) for better reproduction of details and dynamics
- Black plated motor parts for better heat transfer to the surrounding air
- Conex spider for better durability under extreme conditions
- Gold plated terminals to ensure long-term trouble free connection
- Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing
Notes
Parameter
SW215WA01
SW215WA02
Unit
Before burn-in
After burn-in
Before burn-in
After burn-in
Nominal size
8½
8½
[inch.]
Nominal impedance
4
8
[ohm]
Recommended max. upper frequency limit
500
500
[Hz]
1, 4
Sensitivity, 2.83V/1m (calculated from T/S parameters)
88.5
86
[dB]
2, 4
Power handling, short term, IEC 268-5, no additional filtering
1,500
1,500
[W]
2, 4
Power handling, long term, IEC 268-5, no additional filtering
400
400
[W]
2
Power handling, continuous, IEC 268-5, no additional filtering
150
150
[W]
Effective radiating area, Sd
206
206
[sq.cm]
3, 4, 6
Resonance frequency (free air, no baffle), Fs
33
30
35
[Hz]
Moving mass, incl. air (free air, no baffle), Mms
53
49
[g]
3, 4
Force factor, Bxl
8.45
11.4
[N/A]
3, 4, 6
Suspension compliance, Cms
0.43
0.54
0.43
[mm/N]
3, 4, 6
Equivalent air volume, Vas
26
32.5
26
[lit.]
3, 4, 6
Mechanical resistance, Rms
1.0
1.0
1.0
[Ns/m]
3, 4, 6
Mechanical Q, Qms
11
10
10.7
[-]
3, 4, 6
Electrical Q, Qes
0.51
0.46
0.52
[-]
3, 4, 6
Total Q, Qts
0.49
0.44
0.49
[-]
4
Voice coil resistance, RDC
3.3
6.3
[ohm]
5
Voice coil inductance, Le (measured at 1 kHz)
1.2
1.7
[mH]
Voice coil inside diameter
39
39
[mm]
Voice coil winding height
25
25
[mm]
Air gap height
5
5
[mm]
Theoretical linear motor stroke, Xmax
±10
±10
[mm]
Magnet weight
[g]
Total unit net weight excl. packaging
2.4
2.4
[kg]
3, 4, 5
Krm
7.0
1.04
[mohm]
3, 4, 5
Erm
0.68
0.94
[-]
3, 4, 5
Kxm
6.9
15.1
[mH]
3, 4, 5
Exm
0.78
0.74
[-]
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