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Thumbnail Filmstrip of Wavecor Subwoofer SW270WA01 4 Ohm 10 Inch Images
Wavecor Speaker Driver - SW270WA01 - 4 Ohm 10.5 Inch Air-Dried Paper Cone Subwoofer
Description
The 10.5 inch transducer SW270WA01 was designed specifically for high-performance subwoofer applications where sound quality and low distortion are the priorities. It features Wavecor Balanced Drive motor technology.
Features
- Extremely large linear stroke, Xmax = ±11 mm, ensuring low distortion at high output levels
- Very rigid air-dried paper cone to ensure piston motion at high levels for reduced distortion
- Chassis with extensive venting for lower airflow speed, reducing audible distortion
- Vented centre pole with dual flares for reduced noise level at large cone excursions
- Heavy-duty black glass fibre voice coil former to reduce mechanical losses, resulting in better dynamic performance and low-level details
- Large motor with 2" voice coil diameter for better control and power handling
- Built-in aluminium field-stabilising 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
Technical Specifications
| Notes | Parameter | Value | Unit |
| Nominal size | 10½ | inch | |
| Nominal impedance | 4 | Ohm | |
| Recommended max. upper frequency limit | 400 | Hz | |
| 1, 3 | Sensitivity, 2.83V/1m (calculated from T/S parameters) | 88 | dB |
| 2 | Power handling, short term, IEC 268-5, no additional filtering | 350 | W |
| 2 | Power handling, long term, IEC 268-5, no additional filtering | 150 | W |
| 2 | Power handling, continuous, IEC 268-5, no additional filtering | 150 | W |
| Effective radiating area, Sd | 312 | cm2 | |
| 3, 6 | Resonance frequency (free air, no baffle), Fs | 28 | Hz |
| Moving mass, incl. air (free air, no baffle), Mms | 88 | g | |
| 3 | Force factor, Bxl | 9.7 | N/A |
| 3, 6 | Suspension compliance, Cms | 0.37 | mm/N |
| 3, 6 | Equivalent air volume, Vas | 51 | lit. |
| 3, 6 | Mechanical resistance, Rms | 1.9 | N·s/m |
| 3, 6 | Mechanical Q, Qms | 8.1 | - |
| 3, 6 | Electrical Q, Qes | 0.53 | - |
| 3, 6 | Total Q, Qts | 0.49 | - |
| 4 | Voice coil resistance, RDC | 3.2 | Ohm |
| 5 | Voice coil inductance, Le (measured at 1 kHz) | 1.4 | mH |
| Voice coil inside diameter | 51 | mm | |
| Voice coil winding height | 28 | mm | |
| Air gap height | 6 | mm | |
| Theoretical linear motor stroke, Xmax | ±11 | mm | |
| Magnet weight | 1260 | g | |
| Total unit net weight excl. packaging | 3.6 | kg | |
| 3, 5 | Krm | 17 | mOhm |
| 3, 5 | Erm | 0.61 | - |
| 3, 5 | Kxm | 10.5 | mH |
| 3, 5 | Exm | 0.75 | - |
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 °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, involving parameters Krm, Erm, Kxm, and Exm.
Note 6 After burn-in specifications are measured 12 hours
after exciting the transducer by a 20 Hz sine wave for 2 hours at level 10 VRMS. The unit is not burned in before shipping.