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FR070WA03/04     2 alu-cone fullranges, 4/8 ohm

 

 

 

 

The 2” transducers FR070WA03 (4 ohm) and FR070WA04 (8 ohm) were designed especially for high quality multimedia and lifestyle speakers, where sound reproduction without compromises is required.

Frequency resp.
Specifications
Dimensions
Ordering info

FEATURES

Wavecor FR070WA03
  • True full-range design with on-axis output to beyond 25kHz
  • Copper cap on center pole to reduce voice coil inductance and to minimize variations in voice coil inductance as a function of voice coil position
  • Black anodized alu cone for better heat transfer
  • Optimized off-axis response
  • 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 22 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

FR070WA03-SPL-&-IMP-respons

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

FR070WA04-SPL-&-IMP-respons

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

FR070WA03

FR070WA04

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

full range

full range

[kHz]

1, 5

Sensitivity, 2.83V/1m (average SPL in range 200 - 10,000 Hz)

86

83

[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

10

10

[W]

 

Effective radiating area, Sd

21

21

[sq.cm]

3, 5, 7

Resonance frequency (free air, no baffle), Fs

121

114

124

117

[Hz]

 

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

2.0

1.9

[g]

3

Force factor, Bxl

2.3

2.9

[N/A]

3, 5, 7

Suspension compliance, Cms

0.87

0.97

0.87

0.97

[mm/N]

3, 5, 7

Equivalent air volume, Vas

0.54

0.61

0.54

0.61

[lit.]

3, 5, 7

Mechanical resistance, Rms

0.11

0.11

0.11

0.11

[Ns/m]

3, 5, 7

Mechanical Q, Qms

13.8

13.1

13.4

12.7

[-]

3, 5, 7

Electrical Q, Qes

0.99

0.94

1.13

1.07

[-]

3, 5, 7

Total Q, Qts

0.92

0.87

1.04

0.98

[-]

4

Voice coil resistance, RDC

3.45

6.4

[ohm]

6

Voice coil inductance, Le (measured at 10 kHz)

71

110

[μH]

 

Voice coil inside diameter

22

22

[mm]

 

Voice coil winding height

7

7

[mm]

 

Air gap height

3

3

[mm]

 

Magnet weight

115

115

[g]

 

Total unit net weight excl. packaging

0.29

0.29

[kg]

3, 6

Krm

 

 

[mohm]

3, 6

Erm

 

 

[-]

3, 6

Kxm

 

 

[mH]

3, 6

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

Measured at 25 deg. C

Note 6

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 7

After-burn-in specifications are measured at least 12 hours after exiting the transducer by a 20 Hz sine wave for 2 hours at level 2.83/4.0 VRMS (4/8 ohm version). Unit are not burned in before shipping.

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

FR070WA01/02 outline drawing
FR070WA03_04-outline-drawing1

TERMINAL NOMINAL DIMENSIONS (mm)

FR070WA03_04-terminals

Terminal plating: Gold
Thickness, both terminals: 0.5 mm

PACKAGING AND ORDERING INFORMATION

Part no. FR070WA03-01

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

Part no. FR070WA03-02

4 ohm version, bulk packaging

Part no. FR070WA04-01

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

Part no. FR070WA04-02

8 ohm version, bulk packaging

Latest update: August 12, 2014
 

 

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

FR070WA01/02 specificationsPDF data sheet
(880 KB)

 

 

 

 

Neodymium version

 

2” subwoofer

 

3" fullrange

 

All Wavecor drive units

 

 

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