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- Extremely rigid aluminium cone to ensure piston motion at high levels and for better heat transfer at high continuous power levels
- New reinforced die cast alu chassis with optimal ventilation and increased stroke
- Venting through holes in cone neck for reduced distortion and compression
- Vented chassis for lower air flow speed reducing audible distortion
- Two internally built-in alu rings for stabilizing the magnetic field leading to lower high-level distortion
- Heavy-duty black fiber glass voice coil bobbin to reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor system with 2” voice coil diameter and 145 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 small-cabinet performance
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FREQUENCY RESPONSE SW312WA03/05
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FREQUENCY RESPONSE SW312WA04/06
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NOMINAL SPECIFICATIONS
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Notes
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Parameter
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SW312WA03
SW312WA05
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SW312WA04
SW312WA06
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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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12.25
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12.25
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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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90
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87
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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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[W]
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2
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Power handling, long term, IEC 268-5, no additional filtering
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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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250
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250
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[W]
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Effective radiating area, Sd
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488
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488
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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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28
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29
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[Hz]
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Moving mass, incl. air (free air, no baffle), Mms
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185
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172
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[g]
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3
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Force factor, Bxl
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14.5
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18.4
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[N/A]
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3, 6
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Suspension compliance, Cms
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0.18
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0.18
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[mm/N]
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3, 6
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Equivalent air volume, Vas
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61
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61
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[lit.]
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3, 6
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Mechanical resistance, Rms
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2.8
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2.8
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[Ns/m]
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3, 6
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Mechanical Q, Qms
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11.5
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11.0
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[-]
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3, 6
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Electrical Q, Qes
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0.50
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0.60
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[-]
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3, 6
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Total Q, Qts
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0.48
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0.57
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[-]
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4
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Voice coil resistance, RDC
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3.2
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6.6
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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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1.55
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2.5
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[mH]
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Voice coil inside diameter
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51
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51
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[mm]
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Voice coil winding height
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31
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31
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[mm]
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Air gap height
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8
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8
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[mm]
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Theoretical linear motor stroke, Xmax
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+/-11.5
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+/-11.5
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[mm]
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Magnet weight
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2.7
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2.7
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[g]
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Total unit net weight excl. packaging
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6.5
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6.5
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[kg]
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3, 5
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Krm
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10.4
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12.8
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[mohm]
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3, 5
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Erm
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0.70
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0.72
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[-]
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3, 5
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Kxm
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11.3
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18.7
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[mH]
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3, 5
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Exm
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0.75
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0.74
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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 12 hours after exciting the transducer by a 20 Hz sine wave for 2 hours at level 10/14.1 VRMS (4/8 ohm version). The unit is not burned in before shipping.
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HARMONIC DISTORTION
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OUTLINE DRAWING AND NOMINAL DIMENSIONS
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Part no. SW312WA03-01
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4 ohm version, alu colour cone, individual packaging (one piece per box)
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Part no. SW312WA04-01
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8 ohm version, alu colour cone, individual packaging (one piece per box)
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Part no. SW312WA05-01
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4 ohm version, black cone, individual packaging (one piece per box)
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Part no. SW312WA06-01
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8 ohm version, black cone, individual packaging (one piece per box)
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Latest update: August 8, 2022
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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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MORE INFO
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 PDF data sheet
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SW312WA03/05
(4 ohm) enclosure simulations
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SW312WA04/06
(8 ohm) enclosure simulations
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