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FR070WA05     2 neodymium, alu-cone fullrange, 4 ohm

 

 

 

 

 

Upgraded 70 mm fullrange with extended bass response. Recommended for small systems, where frequency range, neutrality, and low distortion are the highest priorities.
Also suitable for high definition full range line sources, with or without subwoofer assistance.

Frequency resp.
Parameters
Dimensions
Harmonnic distortion
Ordering info

Downloads
SPL and impedance response curves as text files

FR070WA05 SPL response

FR070WA05 on-axis SPL response

FR070WA05 impedance response

FR070WA05 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

  • True full-range design with useable frequency range 100 Hz - 20kHz
  • Dual neodymium magnet structure for high efficiency and almost ideal magnetically shielding
  • 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
  • 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 26 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

NOMINAL SPECIFICATIONS

Notes

  Parameter

FR070WA05

Unit

Before burn-in

After
burn-in

 

Nominal size

2.75

[inch.]

 

Nominal impedance

4

[ohm]

 

Recommended max. upper frequency limit

fullrange

[kHz]

1, 4

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

84

[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

15

[W]

 

Effective radiating area, Sd

22

[sq.cm]

3, 4, 6

Resonance frequency (free air, no baffle), Fs

89

 

[Hz]

 

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

3.6

[g]

3, 4

Force factor, Bxl

3.76

[N/A]

3, 4, 6

Suspension compliance, Cms

0.88

 

[mm/N]

3, 4, 6

Equivalent air volume, Vas

0.60

 

[lit.]

3, 4, 6

Mechanical resistance, Rms

0.16

 

[Ns/m]

3, 4, 6

Mechanical Q, Qms

12.6

 

[-]

3, 4, 6

Electrical Q, Qes

0.49

 

[-]

3, 4, 6

Total Q, Qts

0.47

 

[-]

4

Voice coil resistance, RDC

3.4

[ohm]

5

Voice coil inductance, Le (measured at 10 kHz)

0.10

[mH]

 

Voice coil inside diameter

26

[mm]

 

Voice coil winding height

9.4

[mm]

 

Air gap height

4

[mm]

 

Theoretical linear motor stroke, Xmax

`+/-2.7

[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 2.83/4.0 VRMS (4/8 ohm version). The unit is not burned in before shipping.

FREQUENCY RESPONSE

FR070WA05-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

FR070WA05-impedance

HARMONIC DISTORTION

FR070WA05-Harmonic-distortion

Measuring conditions, harmonic distortion
Driver mounting: In sealed, heavily stuffed enclosure, internal volume 1 lit.
Microphone distance: 0.5 m
Input signal: Stepped sine wave, 2.45 VRMS
Smoothing: 1/6 oct.

OUTLINE DRAWING AND NOMINAL DIMENSIONS (mm)

FR070WA05 outline drawing
FR070WA05-outline-drawing

TERMINAL NOMINAL DIMENSIONS (mm)

FR070WA05-terminals

Plating, both terminals: GOLD

PACKAGING AND ORDERING INFORMATION

Part no. FR070WA05-01

4 ohm, packed in pairs

Part no. FR070WA05-02

4 ohm version, packed in bulk (industrial) packaging

Latest update: October 18, 2020

 

Specifications are subject to change without any further notice.
Copyright © 2006-2020 by Wavecor Ltd., Zhongshan, China. All rights reserved.

 

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MORE INFO

FR070WA05 specificationsPDF data sheet

 

 

 

Wavecor fullrangesList of all fullrange drivers

 

 

 

 

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