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Thumbnail Filmstrip of Wavecor Subwoofer SW070WA01 4 Ohm 3 Inch Images
Wavecor Speaker Driver - SW070WA01 - 4 Ohm 2¾" Alu-Cone Subwoofer
Description
The 2¾” transducer SW070WA01 - 4 Ohm is designed especially for high quality multimedia and lifestyle speakers, where space otherwise usually does not allow for "real bass".
Ideal for combining with the Wavecor FR070WA 2¾” fullrange or any good tweeter.
Features
- True subwoofer design for vented or sealed enclosures
- Dual neodymium magnet structure for high efficiency and almost ideal magnetically shielding
- Black anodised alu cone for better heat transfer
- Vented polymer chassis for lower air flow speed reducing audible distortion
- Vented voice coil former for reduced distortion and compression
- Heavy-duty black fibre glass voice coil bobbin to reduce mechanical losses resulting in better dynamic performance and low-level details
- Large motor with 26 mm voice coil diameter for better control and power handling
- Low-loss suspension (high Qm) for better reproduction of details and dynamics
- Black 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
Frequency SPL and Impedance Response Graphs
Measuring conditions for SPL
Driver mounting: Flush in infinite baffle
Microphone distance: 1.0 m
Input level: 2.83 VRMS
Smoothing: 1/6 oct.
Measuring conditions for impedance
Driver mounting: Free air, no baffle
Input signal: Stepped sine wave, semi-current-drive, nominal current 2 mA
Smoothing: None
Technical Specifications
| Notes | Parameter | Value | Unit | |
| Before Burn-in | After Burn-in | |||
| Nominal size | 2¾ | inch | ||
| Nominal impedance | 4 | Ohm | ||
| Recommended max upper frequency limit |
4 | kHz | ||
| 1 | Sensitivity, 2.83V/1m (average SPL in range 200-1000 kHz) | 84.5 | dB | |
| 2 | Power handling, short term, IEC 268-5, 6 kHz, no additional filtering | W | ||
| 2 | Power handling, long term, IEC 268-5, 6 kHz, no additional filtering | W | ||
| 2 | Power handling, continuous, IEC 268-5, 6 kHz, no additional filtering | 15 | W | |
| Effective radiating area, Sd | 22 | cm2 | ||
| 3, 6 | Resonance frequency (free air, no baffle), Fs | 84 | 73 | Hz |
| Moving mass, incl. air (free air, no baffle), Mms | 3.65 | g | ||
| 3 | Force factor, Bxl | 3.85 | - | |
| 3, 6 | Suspension compliance, Cms | 0.98 | 1.3 | mm/N |
| 3, 6 | Equivalent air volume, Vas | 0.68 | 0.89 | lit |
| 3, 6 | Mechanical resistance, RMS | 0.30 | 0.28 | |
| 3, 6 | Mechanical Q, Qms | 6.4 | 5.9 | - |
| 3, 6 | Electrical Q, Qes | 0.42 | 0.36 | - |
| 3, 6 | Total Q, Qts | 0.39 | 0.34 | - |
| 4 | Voice coil resistance, RDC | 3.2 | Ohm | |
| 5 | Voice coil inductance, Le (measured at 10 kHz) | 0.16 | mH | |
| Voice coil inside diameter | 26 | mm | ||
| Voice coil winding height | 9 | mm | ||
| Air gap height | 4 | mm | ||
| Magnet weight (dual neodymium) | 35+8 | g | ||
| Total unit net weight excl. packaging | 0.16 | kg | ||
| 3, 5 | Krm | 0.055 | mOhm | |
| 3, 5 | Erm | 1.02 | - | |
| 3, 5 | Kxm | 4.0 | mH | |
| 3, 5 | Exm | 0.68 | - | |
Note 1 Measured in infinite baffle.
Note 2 Tested in free air (no cabinet).
Note 3 Measured using a semi-constant current source, nominal level 2 mA.
Note 4 Measured at 20 deg. C
Note 5 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.
Note 6 After burn-in specifications are measured 12 hours after exiting the transducer by a 20 Hz sine wave for 2 hours at level 6.3/8.9 VRMS (4/8 ohm version). The unit is not burned in before shipping.
Driver Nominal Dimensions
Loudspeaker Driver Dimensions and Measurements - all dimensions in mm (approx.)
Terminal Nominal Dimensions
Loudspeaker Driver Terminal Dimensions and Measurements - all dimensions in mm (approx.)
Thickness, both terminals: 0.5 mm
Terminal plating: Gold