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SW270WA01     10 subwoofer, air-dried paper cone, 4 ohm

 

 

 

 

Wavecor Balanced Drive Technology

The 10” transducer SW270WA01 was designed specifically for high performance  subwoofer applications where sound quality and low distortion are the priorities. It features the Wavecor Balanced Drive motor technology.

Frequency resp.
Specifications
Dimensions
Ordering info

FEATURES

SW270WA01-350px
  • Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
  • Extremely large linear stroke, Xmax = 11 mm, ensuring low distortion at high output levels
  • Very rigid air dried paper cone cone to ensure piston motion at high levels for reduced distortion
  • 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 black fiber glass 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 alu field-stabilizing ring for reduced distortion at high levels
  • Low-loss suspension (high Qm) for better reproduction of details and dynamics
  • Black platedd 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 RESPONSE

SW270WA01-SPL-&-IMP

Measuring conditions, SPL
Driver mounting: Flush in infinite
     baffle, back side open (no cabinet)
Microphone distance: 1.0 m
Input signal: 2.83 VRMS stepped sine wave
Smoothing: 1/6 oct.

Measuring conditions, impedance
Driver mounting: Free air, no baffle,
     back side open (no cabinet)
Input signal: Stepped sine wave, semi-
     current-drive, nominal current 2 mA
Smoothing: None

NOMINAL SPECIFICATIONS

Notes

  Parameter

Before
burn-in

After
burn-in

Unit

 

Nominal size

10

[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

 

[W]

2

Power handling, long term, IEC 268-5, no additional filtering

 

[W]

2

Power handling, continuous, IEC 268-5, no additional filtering

150

[W]

 

Effective radiating area, Sd

312

[sq.cm]

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

 

[Ns/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

 

[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 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. This more accurate transducer model is described in a technical paper (PDF) here.

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 10 VRMS. The unit is not burned in before shipping.
 

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

SW270WA01 outline drawing
SW270WA01-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

Terminals-dimensions

PACKAGING AND ORDERING INFORMATION

 Part no. SW270WA01-01

 Individual packaging (one piece per box)

Latest update: Sep. 10, 2014

 

Specifications are subject to change without any further notice.
Copyright © 2006-2014 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

SW270WA01 specificationsPDF data sheet
(445 KB)

 

Balanced Drive technical paperBalanced Drive technical paper
(2.34MB)

 

 

 

All Wavecor subwoofers

 

All Wavecor drive units

 

Sealed box simulations SW270WA01Cabinet simulations
(335 KB)

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