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SW280WA03/04     11 low profile, paper cone subwoofers, 4/8 ohm

 

 

 

 

SW280WA03 and SW280WA04 are woofers designed for dedicated sub bass applications. They work equally well for high-
end hi-fi, high quality home theater systems, and top multimedia setups.
Innovative, very shallow design, with motor structure mounted “inside” the cone.
Recommended for high end audio applications, where build-in depth is limited.
Typical applications are for high performance in-wall and theater systems.

Frequency resp.
Specifications
Dimensions
Ordering info

8 ohm version (SW280WA04) to be launched soon

Downloads
SPL and impedance response curves as text files

SW280WA03_SPL_response

SW280WA03 SPL response

SW280WA03_impedance_response

SW280WA03 impedance response

SW280WA04_SPL_response

SW280WA04 SPL response

SW280WA04_impedance_response

SW280WA04 mpedance 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

  • New innovative design with cone wrapped around the motor structure to reduce overall dept
  • Rigid reinforced air dried paper cone to ensure piston motion at high drive levels
  • Venting through holes in spider ring reduced distortion and compression
  • Vented chassis for lower air flow speed reducing audible distortion
  • Internal alu ring for stabilizing the magnetic field leading, to lower high-SPL distortion
  • Vented heavy-duty black fiber glass voice coil bobbin to reduce mechanical losses resulting in better dynamic performance and low-level details
  • Large motor structure with 1.5” voice coil diameter and 135 mm magnet for better control and efficiency
  • Black-anodized magnet structure steel parts for increased heat dissipation and power handling
  • Long linear stroke motor for reduced distortion at high levels
  • Linear suspension with specially designed CONEX damper (spider) for long durability under extreme operating conditions
  • 4-layer voice coil for increased control and better formance in small volumes

FREQUENCY RESPONSE

SW280WA03-SPL-resp

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

SW280WA03-IMP-resp
SW280WA04-SPL-resp

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

SW280WA04-IMP-resp

NOMINAL SPECIFICATIONS

Notes

  Parameter

SW280WA03

SW280WA04

Unit

Before burn-in

After burn-in

Before burn-in

After burn-in

 

Nominal size

11

11

[inch.]

 

Nominal impedance

4

8

[ohm]

 

Recommended max. upper frequency limit

300

300

[Hz]

1, 3

Sensitivity, 2.83V/1m (calculated from T/S parameters)

90.5

 

[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

320

320

[sq.cm]

3, 6

Resonance frequency (free air, no baffle), Fs

39

 

 

 

[Hz]

 

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

87

 

[g]

3

Force factor, Bxl

12.6

 

[N/A]

3, 6

Suspension compliance, Cms

0.19

 

 

 

[mm/N]

3, 6

Equivalent air volume, Vas

27.6

 

 

 

[lit.]

3, 6

Mechanical resistance, Rms

1.85

 

 

 

[Ns/m]

3, 6

Mechanical Q, Qms

11.6

 

 

 

[-]

3, 6

Electrical Q, Qes

0.46

 

 

 

[-]

3, 6

Total Q, Qts

0.44

 

 

 

[-]

4

Voice coil resistance, RDC

3.4

 

[ohm]

5

Voice coil inductance, Le (measured at 1 kHz)

1.64

 

[mH]

 

Voice coil inside diameter

39

 

[mm]

 

Voice coil winding height

17

 

[mm]

 

Air gap height

5

 

[mm]

 

Theoretical linear motor stroke, Xmax

+/-6

 

[mm]

 

Magnet weight

 

 

[g]

 

Total unit net weight excl. packaging

 

 

[kg]

3, 5

Krm

 

 

[mohm]

3, 5

Erm

 

 

[-]

3, 5

Kxm

 

 

[mohm]

3, 5

Exm

 

 

[-]

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 exciting the transducer by a 20 Hz sine wave for 2 hours at level 10/14.1 VRMS (4/8 ohm version). The unit is not burned in before shipping.
 

OUTLINE DRAWING AND NOMINAL DIMENSIONS

Dimensions in mm

SW280WA03/04 outline drawing PDF
SW280WA03-DWG

PACKAGING AND ORDERING INFORMATION

Part no. SW280WA03-01

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

Part no. SW280WA04-01

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

Latest update: August 15, 2019

 

Specifications are subject to change without any further notice.
Copyright © 2006-2019 by Wavecor Ltd., Guangzhou, China. All rights reserved.

 

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MORE INFO

PDF data sheet

 

 

 

All Wavecor subwoofersAll Wavecor subwoofers
(overview)

 

SW280WA03 enclosure simulationsSW280WA03
(4 ohm) enclosure simulations

 

SW280WA04 enclosure simulationsSW280WA04
(8 ohm) enclosure simulations

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