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SW084OM01/02     3" paper cone subwoofers, 4/8 ohm

 

 

 

 

 

The 3" transducers SW084OM01 (4 ohm) and SW084OM02 (8 ohm) were designed to provide real and undistorted bass from small enclosures. Examples of applications are high quality multimedia and lifestyle speakers and  personal audio products, where bass reproduction without compromises is required.
Works well as dedicated subwoofer in combination with small 2-way designs. Another obvious application is as the woofer portion in a 2-way speaker in combination with a small fullrange unit (ideally like FR040WA)

Frequency resp.
Specifications
Dimensions
Distortion
Ordering info

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SW084OM01_02_pic1

Downloads
SPL and impedance response curves as text files

SW084OM01 SPL response

SW084OM01 on-axis SPL response

SW084OM01 impedance

SW084OM01 impedance response

SW084OM02 SPL response

SW084OM02 on-axis SPL response

SW084OM02 impedance

SW084OM02 impedance response

Important!
Please observe that these text files for download are actual measurements of the drivers measured in infinite baffle and without any enclosure. Measuring the drivers in a finite baffle (like the baffle of most speaker cabinets) and in any size of enclosure will lead to different response curves.

FEATURES

  • FEA optimized suspension for perfect symmetry, reducing even order harmonic distortion
  • Balanced Drive motor with perfect force factor symmetry for reduced distortion
  • Long linear stroke, ensuring low distortion at high output levels
  • Rigid paper cones to ensure piston motion even at high levels - for reduced distortion
  • Vented voice coil former for reduced distortion and compression
  • Vented chassis for lower air flow speed reducing audible distortion
  • Heavy-duty black fiber glass voice coil bobbin to increase power handling and reduce mechanical losses resulting in better dynamic performance and low-level details
  • Progressive suspension with optimized compromise between linearity and soft clipping
  • New damper (spider) woven of a mix of polymers and natural fibers for improved durability
  • Gold plated terminals to prevent oxidation for long-term reliable connection
  • Delivered with foam gasket attached to the frame for hassle-free mounting and secure enclosure sealing

NOMINAL SPECIFICATIONS

Notes

  Parameter

SW084OM01

SW084OM02

Unit

Before burn-in

After burn-in

Before burn-in

After burn-in

 

Nominal size

3

3

[inch.]

 

Nominal impedance

4

8

[ohm]

 

Recommended max. upper frequency limit

2

2

[kHz]

1, 4

Sensitivity, 2.83V/1m (average SPL in range 200 - 2,000 Hz)

86

83

[dB]

2, 4

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

 

 

[W]

2, 4

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

 

 

[W]

2

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

40

40

[W]

 

Effective radiating area, Sd

33.5

33.5

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

74

 

77

 

[Hz]

 

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

4.35

4.05

[g]

3, 4

Force factor, Bxl

3.56

4.58

[N/A]

3, 4, 6

Suspension compliance, Cms

1.07

 

1.07

 

[mm/N]

3, 4, 6

Equivalent air volume, Vas

1.70

 

1.70

 

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.22

 

0.22

 

[Ns/m]

3, 4, 6

Mechanical Q, Qms

9.2

 

8.8

 

[-]

3, 4, 6

Electrical Q, Qes

0.46

 

0.57

 

[-]

3, 4, 6

Total Q, Qts

0.44

 

0.53

 

[-]

4

Voice coil resistance, RDC

2.9

6.1

[ohm]

5

Voice coil inductance, Le (measured at 1 kHz)

0.40

0.72

[mH]

 

Voice coil inside diameter

26

26

[mm]

 

Voice coil winding height

12

12

[mm]

 

Air gap height

3

3

[mm]

 

Theoretical linear motor stroke, Xmax

4.5

4.5

[mm]

 

Magnet weight

 

 

[g]

 

Total unit net weight excl. packaging

 

 

[kg]

3, 4, 5

Krm

0.52

1.48

[mohm]

3, 4, 5

Erm

0.82

0.76

[-]

3, 4, 5

Kxm

3.9

6.3

[mH]

3, 4, 5

Exm

0.71

0.71

[-]

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 25 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 exciting the transducer by a 20 Hz sine wave for 2 hours at level 4.0/5.65 VRMS (4/8 ohm version). The unit is not burned in before shipping.

FREQUENCY RESPONSE

SW084OM01-SPL-response

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

SW084OM01-impedance
SW084OM02-SPL-response

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

SW084OM02-impedance

HARMONIC DISTORTION

SW084OM01-Harmonic-Distortion

Measuring conditions, harmonic distortion
Driver mounting: In sealed, heavily stuffed enclosure, internal volume 1.0 lit.,
                           baffle dimensions 112 mm x 112 mm
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 4.0 VRMS (SW084OM01) / 5.65 VRMS (SW084OM02)
Smoothing: 1/6 oct.

SW084OM02-Harmonic-Distortion

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

SW084OM01/02 outline drawing
SW084OM01_02-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

SW084OM01_02-terminals

PACKAGING AND ORDERING INFORMATION

Part no. SW084OM01-02

4 ohm version, packed in bulk (industrial) packaging

Part no. SW084OM02-02

8 ohm version, packed in bulk (industrial) packaging

Latest update: July 7, 2016
 

 

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

SW084OM01/02 specificationsPDF data sheet
(1.08 MB)

 

 

 

 

 

 

 

 

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