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FR084OM01/02     3" paper cone fullranges, 4/8 ohm

 

 

 

 

 

The 3" transducers FR084OM01 (4 ohm) and FR084OM02 (8 ohm) were designed especially for high quality multimedia and lifestyle speakers, where sound reproduction without compromises is required while still keeping size small. 

Frequency resp.
Specifications
Dimensions
Distortion
Ordering info

Wavecor OEM line of transducers

Downloads
SPL and impedance response curves as text files

FR084OM01 SPL response

FR084OM01 on-axis SPL response

FR084OM01 impedance

FR084OM01 impedance response

FR084OM02 SPL response

FR084OM02 on-axis SPL response

FR084OM02 impedance

FR084OM02 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) or in any size of enclosure will lead to different response curves.

FEATURES

  • FEA optimized suspension for perfect symmetry, reducing even order harmonic distortion
  • 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
  • Rigid paper cone to ensure piston motion even at high levels
  • True full range extension to 20 kHz
  • 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
  • New damper (spider) woven of a mix of polymers and natural fibers for improved durability
  • Gold plated terminals to ensure long-term trouble free connection
  • Delivered with foam gasket attached for hassle-free mounting and secure cabinet sealing

NOMINAL SPECIFICATIONS

Notes

  Parameter

FR084OM01

FR084OM02

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

full range

full range

[kHz]

1, 4

Sensitivity, 2.83V/1m (average SPL in range 200 - 20 kHz)

88

85

[dB]

2, 4

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

70

70

[W]

2, 4

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

25

25

[W]

2

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

10

10

[W]

 

Effective radiating area, Sd

36

36

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

115

 

117

 

[Hz]

 

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

3.25

3.15

[g]

3, 4

Force factor, Bxl

2.75

3.40

[N/A]

3, 4, 6

Suspension compliance, Cms

0.59

 

0.59

 

[mm/N]

3, 4, 6

Equivalent air volume, Vas

1.08

 

1.08

 

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.25

 

0.25

 

[Ns/m]

3, 4, 6

Mechanical Q, Qms

9.4

 

9.2

 

[-]

3, 4, 6

Electrical Q, Qes

1.02

 

1.20

 

[-]

3, 4, 6

Total Q, Qts

0.92

 

1.06

 

[-]

4

Voice coil resistance, RDC

3.3

6.0

[ohm]

5

Voice coil inductance, Le (measured at 10 kHz)

0.068

0.11

[mH]

 

Voice coil inside diameter

22

22

[mm]

 

Voice coil winding height

7.5

7.5

[mm]

 

Air gap height

3

3

[mm]

 

Theoretical linear motor stroke, Xmax

2.25

2.25

[mm]

 

Magnet weight

 

 

[g]

 

Total unit net weight excl. packaging

 

 

[kg]

3, 4, 5

Krm

8.5

15

[mohm]

3, 4, 5

Erm

0.49

0.47

[-]

3, 4, 5

Kxm

16

27

[mH]

3, 4, 5

Exm

0.43

0.42

[-]

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

FR084OM01-SPL

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

FR084OM01-IMP
FR084OM02-SPL

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

FR084OM02-IMP

HARMONIC DISTORTION

FR084OM01-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, 2.0 VRMS (FR084OM01) / 2.83 VRMS (FR084OM02)
Smoothing: 1/6 oct.

FR084OM02-harmonic-distortion

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

SW084OM01/02 outline drawing
FR084OM01_02 outline drawing

TERMINAL NOMINAL DIMENSIONS (mm)

SW084OM01_02-terminals

PACKAGING AND ORDERING INFORMATION

Part no. FR084OM01-01

4 ohm version, packed in bulk (industrial) packaging

Part no. FR084OM02-01

8 ohm version, packed in bulk (industrial) packaging

Latest update: September 5, 2017

 

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
(1.13 MB)

 

 

 

 

 

 

 

 

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