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SW070WA01/02     2 neodymium, alu-cone subwoofers, 4/8 ohm

 

 

 

 

The 2” transducers SW070WA01 (4 ohm) and SW070WA02 (8 ohm) were 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 2” fullranges or any good tweeter.

Frequency resp.
Specifications
Dimensions
Ordering info

FEATURES

SW070WA01_02-picture_300px
  • True subwoofer design for vented or sealed enclosures
  • Dual neodymium magnet structure for high efficiency and almost ideal magnetically shielding
  • Black anodized 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 fiber 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 RESPONSE

SW070WA01 SPL & impedance response

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

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

SW070WA02 SPL & impedance response

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

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

NOMINAL SPECIFICATIONS

Notes

  Parameter

SW070WA01

SW070WA02

Unit

Before burn-in

After burn-in

Before burn-in

After burn-in

 

Nominal size

2

2

 [inch.]

 

Nominal impedance

4

8

 [ohm]

 

Recommended max. upper frequency limit

4

4

 [kHz]

1

Sensitivity, 2.83V/1m (average SPL in range 400 - 1,000 Hz)

84.5

81

 [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

15

15

 [W]

 

Effective radiating area, Sd

22

22

 [sq.cm]

3, 6

Resonance frequency (free air, no baffle), Fs

84

73

87

76

 [Hz]

 

Moving mass, incl. air (free air, no baffle), Mms

3.65

3.4

 [g]

3

Force factor, Bxl

3.85

4.75

 [N/A]

3, 6

Suspension compliance, Cms

0.98

1.3

0.98

1.3

 [mm/N]

3, 6

Equivalent air volume, Vas

0.68

0.89

0.68

0.89

 [lit.]

3, 6

Mechanical resistance, Rms

0.30

0.28

0.30

0.28

 [Ns/m]

3, 6

Mechanical Q, Qms

6.4

5.9

6.2

5.7

 [-]

3, 6

Electrical Q, Qes

0.42

0.36

0.53

0.46

 [-]

3, 6

Total Q, Qts

0.39

0.34

0.49

0.42

 [-]

4

Voice coil resistance, RDC

3.2

6.4

 [ohm]

5

Voice coil inductance, Le (measured at 10 kHz)

0.16

0.28

 [mH]

 

Voice coil inside diameter

26

26

 [mm]

 

Voice coil winding height

9

9

 [mm]

 

Air gap height

4

4

 [mm]

 

Magnet weight (dual neodymiun)

35+8

35+8

 [g]

 

Total unit net weight excl. packaging

0.16

0.16

 [kg]

3, 5

Krm

0.055

0.069

 [mohm]

3, 5

Erm

1.02

1.04

 [-]

3, 5

Kxm

4.0

7.8

 [mH]

3, 5

Exm

0.68

0.67

 [-]

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 6.3/8.9 VRMS (4/8 ohm version). The unit is not burned in before shipping.
 

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

SW070WA01/02 outline drawing
SW070WA01_02-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

FR/SW070WA-terminals

Terminal plating:
Gold

PACKAGING AND ORDERING INFORMATION

Part no. SW070WA01-01

4 ohm version, individual packaging (one pair per box)

Part no. SW070WA01-02

4 ohm version, bulk packaging

Part no. SW070WA02-01

8 ohm version, individual packaging (one pair per box)

Part no. SW070WA02-02

8 ohm version, bulk packaging

Latest update: Apr. 3, 2012
 

 

Specifications are subject to change without any further notice.
Copyright © 2006-2018 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

SW070WA01/02 specificationsPDF data sheet
(1.5 MB)

 

 

 

 

 

 

2” fullrange

 

All Wavecor drive units

 

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