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SW280WA01/02     11 low profile, die cast, flat cone subwoofer, 4/8 ohm

 

 

 

 

 

11” High Performance Low Profile Subwoofer Units.
Innovative design with dual rubber surround suspension and flat sandwich cone.
Recommended for high end audio applications, where build-in depth is limited.
A typical application is for high performance in-wall systems.

Specifications
Frequency resp.
Harm. distortion
Dimensions
Ordering info

FEATURES

  • Dual surround suspension and flat cone design to minimize build-in depth
  • Glass fiber / PMI foam sandwich cone to maximize bending stiffness leading to improved freqiuency response
  • Innovative dual cone design to allow magnet mounting “inside” the cone resulting in reduced overall depth
  • Balanced Drive motor structure for optimal drive force symmetry resulting in largely reduced even order harmonic distortion
  • Rigid die cast 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 vented fiber glass voice coil former to reduce mechanical losses resulting in better dynamic performance and low-level details
  • 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 plated motor parts for better heat transfer to the surrounding air
  • Gold plated terminals to ensure long-term trouble free connection
  • Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing

Downloads
SPL and impedance response curves as text files

SW280WA01 SPL response

SW280WA01 SPL response

SW280WA01 impedance response

SW280WA01 impedance response

SW280WA02 SPL response

SW280WA02 SPL response

SW280WA02 impedance esponse

SW280WA02 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.

NOMINAL SPECIFICATIONS

Notes

  Parameter

SW280WA01

SW280WA02

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

400

400

[Hz]

1, 4

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

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

200

200

[W]

 

Effective radiating area, Sd

335

335

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

26.6

 

26.9

 

[Hz]

 

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

137.6

134.2

[g]

3, 4

Force factor, Bxl

13.4

16.6

[N/A]

3, 4, 6

Suspension compliance, Cms

0.26

 

0.26

 

[mm/N]

3, 4, 6

Equivalent air volume, Vas

41.4

 

41.4

 

[lit.]

3, 4, 6

Mechanical resistance, Rms

3.7

 

3.7

 

[Ns/m]

3, 4, 6

Mechanical Q, Qms

6.2

 

6.1

 

[-]

3, 4, 6

Electrical Q, Qes

0.44

 

0.52

 

[-]

3, 4, 6

Total Q, Qts

0.41

 

0.48

 

[-]

4

Voice coil resistance, RDC

3.4

6.3

[ohm]

5

Voice coil inductance, Le (measured at 1 kHz)

1.4

 

[mH]

 

Voice coil inside diameter

39

39

[mm]

 

Voice coil winding height

17

17

[mm]

 

Air gap height

5

5

[mm]

 

Theoretical linear motor stroke, Xmax

+/-6

=/-6

[mm]

 

Magnet weight

 

 

[g]

 

Total unit net weight excl. packaging

 

 

[kg]

3, 4, 5

Krm

 

 

[mohm]

3, 4, 5

Erm

 

 

[-]

3, 4, 5

Kxm

 

 

[mH]

3, 4, 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 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 exiting the transducer by a 20 Hz sine wave for 2 hours at level 10 VRMS. The unit is not burned in before shipping.

FREQUENCY RESPONSE

SW280WA01-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

SW280WA01-IMP-resp
SW280WA02-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

SW280WA02-impedance

HARMONIC DISTORTION

SW280WA01-harm-dist

Measuring conditions, harmonic distortion
Driver mounting: In sealed, heavily stuffed enclosure, internal volume 10 lit.,
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 6.9 VRMS (SW280WA01) / 9.8 VRMS (SW280WA02)
 Smoothing: 1/6 oct.

SW280WA02-harm-dist

OUTLINE DRAWING AND NOMINAL DIMENSIONS

SW280WA01/02 outline drawing PDF
SW280WA01/02 outline DWG

PACKAGING AND ORDERING INFORMATION

Part no. SW280WA01-01

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

Part no. SW280WA02-01

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

Latest update: August 15, 2022

 

Specifications are subject to change without any further notice.
Copyright © 2006-2022 by Wavecor Ltd., China. All rights reserved.

 

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MORE INFO

PDF data sheet

 

 

 

 

 

 

 

 

 

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