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July 2023
This product has been relaunched, now featuring a rigid alu cone.
Please observe the new specifications.
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Downloads
SPL and impedance response curves as text files
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SW280WA03 SPL response
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SW280WA03 impedance response
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SW280WA04 SPL response
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SW280WA04 impedance response
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Important!
Please observe that these text files for download are actual measurements of the drivers measured in infinite baffle and without any enclosure. Measuring the drivers in a finite baffle (like the baffle of most speaker cabinets) and in any size of enclosure will lead to different response curves.
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FEATURES
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- New innovative design with cone wrapped around the motor structure to reduce overall dept
- Rigid alu cone to ensure piston motion at high drive levels
- Venting through holes in spider ring reduced distortion and compression
- Vented chassis for lower air flow speed reducing audible distortion
- Internal alu ring for stabilizing the magnetic field leading, to lower high-SPL distortion
- Vented heavy-duty black fiber glass voice coil bobbin to reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor structure with 1.5” voice coil diameter and 135 mm magnet for better control and efficiency
- Black-anodized magnet structure steel parts for increased heat dissipation and power handling
- Long linear stroke motor for reduced distortion at high levels
- Linear suspension with specially designed CONEX damper (spider) for long durability under extreme operating conditions
- 4-layer voice coil for increased control and better performance in small volumes
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FREQUENCY RESPONSE
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NOMINAL SPECIFICATIONS
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Notes
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Parameter
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SW280WA03
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SW280WA04
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Unit
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Before burn-in
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After burn-in
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Before burn-in
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After burn-in
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Nominal size
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11
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11
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[inch.]
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Nominal impedance
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4
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8
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[ohm]
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Recommended max. upper frequency limit
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300
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300
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[Hz]
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1, 3
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Sensitivity, 2.83V/1m (calculated from T/S parameters)
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88.5
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85.5
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[dB]
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2
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Power handling, short term, IEC 268-5, no additional filtering
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2,000
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2.000
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[W]
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2
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Power handling, long term, IEC 268-5, no additional filtering
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400
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400
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[W]
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2
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Power handling, continuous, IEC 268-5, no additional filtering
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200
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200
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[W]
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Effective radiating area, Sd
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321
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321
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[sq.cm]
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3, 6
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Resonance frequency (free air, no baffle), Fs
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34.5
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34
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35
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34.5
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[Hz]
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Moving mass, incl. air (free air, no baffle), Mms
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105
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102
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[g]
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3
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Force factor, Bxl
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12.5
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15.5
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[N/A]
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3, 6
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Suspension compliance, Cms
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0.20
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0.21
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0.20
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0.21
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[mm/N]
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3, 6
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Equivalent air volume, Vas
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29.7
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30.5
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29.7
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30.6
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[lit.]
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3, 6
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Mechanical resistance, Rms
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2.2
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2.2
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2.2
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2.2
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[Ns/m]
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3, 6
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Mechanical Q, Qms
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10.3
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10.2
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10.1
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10.1
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[-]
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3, 6
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Electrical Q, Qes
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0.48
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0.47
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0.57
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0.57
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[-]
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3, 6
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Total Q, Qts
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0.46
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0.45
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0.54
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0.54
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[-]
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4
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Voice coil resistance, RDC
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3.3
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6.2
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[ohm]
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5
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Voice coil inductance, Le (measured at 1 kHz)
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[mH]
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Voice coil inside diameter
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39
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39
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[mm]
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Voice coil winding height
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17
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17
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[mm]
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Air gap height
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5
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5
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[mm]
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Theoretical linear motor stroke, Xmax
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+/-6
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-/_6
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[mm]
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Magnet weight
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1.4
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1.4
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[kg]
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Total unit net weight excl. packaging
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3.9
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3.9
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[kg]
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3, 5
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Krm
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[mohm]
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3, 5
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Erm
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[-]
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3, 5
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Kxm
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[mohm]
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3, 5
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Exm
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[-]
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Note 1
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Measured in infinite baffle.
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Note 2
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Tested in free air (no cabinet).
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Note 3
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Measured using a semi-constant current source, nominal level 2 mA.
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Note 4
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Measured at 20 deg. C
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Note 5
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It is generally a rough simplification to assume that loudspeaker transducer voice coils exhibit the characteristics of an inductor. Instead it is a far more accurate approach to use the more advanced model often referred to as the “Wright empirical model”, also used in LEAP-4 as the TSL model (www.linearx.com), involving parameters Krm, Erm, Kxm, and Exm. This more accurate transducer model is described in a technical paper (PDF) here.
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Note 6
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After-burn-in specifications are measured at least 12 hours after exciting the transducer by a sine wave at the frequency of Fs for 2 hours at level 17/19 VRMS (4/8 ohm version). The unit is not burned in before shipping.
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HARMONIC DISTORTION
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PACKAGING AND ORDERING INFORMATION
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Part no. SW280WA03-01
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4 ohm version, individual packaging (one piece per box)
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Part no. SW280WA04-01
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8 ohm version, individual packaging (one piece per box)
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Latest update: April 26, 2023
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Specifications are subject to change without any further notice.
Copyright © by Wavecor Ltd., China. All rights reserved.
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