Features

Kenaf-Cellgaia hybrid cone

Reasonable Qts value for easy bass-reflex enclosure design

Newly designed aluminum die- cast frame

Ferrite magnet & repulsion type magnet shielded circuit

Specifications

&

Thiele/Small Parameters

Low Flux Leakage Woofer

FW137

Size

:

130

mm /

5 in

Voice Coil Diameter

 

 

 

 

:

30.4 mm /

1.2 in

 

 

 

 

Cast / Stamped

:

Cast

 

 

 

 

 

 

Impedance

:

8

 

Reproduction Frequency Response :fs - 8 kHz

Sound Pressure Level

 

:

87

dB/W(m)

 

Rated Input

:

25

W

 

 

Music Power

:

75

W

 

 

 

 

 

 

 

Magnet Material

:

Ferrite

 

 

Magnet Weight

 

 

 

 

 

(main)

:

226

g /

0.498

lb

(cancel)

:

152

g /

0.335

lb

 

 

 

 

 

 

Net Weight

 

1,495

g /

3.296

lb

 

 

 

 

 

 

Frequency Response / Impedance

110

 

 

 

 

 

100

 

 

 

 

 

90

 

 

 

 

 

80

 

 

 

 

 

70

 

 

 

 

 

60

 

 

 

 

600

 

Impedance

 

 

 

 

 

 

50

 

 

 

 

 

(dB)

 

 

 

 

 

20Hz

50 100 200

500

1k

2k

5k 10k

64

32

300 16

8

4

20k

a :

55 mm

Sd :

0.0095 m2

Dimensions & Mounting Information

Zn :

8

Fs :

55

Hz

Re :

7.4

Le :

0.067 mH

 

 

 

Qms :

3.58

 

Qes :

0.57

 

Qts :

0.5

 

Mms :

11.7 g

 

 

 

BL :

7.06

Telsa/m

Vas :

10.202

L

Xmax :

1 mm

Eff/η0 :

0.24

%

5-ø4.2 hole

(77) (8)

ø155

ø91.5

ø121

ø150

(86.8) 9.8

Cms :

0.0008 mm/N

EBP :

96.491

 

 

Overall Diameter

:

155

mm /

6.1

in

Baffle Hole Diameter

 

 

 

 

 

:

122

mm /

4.8

in

Depth

:

86.8

mm /

3.4

in

 

 

 

 

 

 

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Fostex FW137 dimensions Features, Specifications Thiele/Small Parameters, Frequency Response / Impedance

FW137 specifications

The Fostex FW137 is a precision-engineered woofer that is well-regarded among audio enthusiasts and professionals alike. It is part of Fostex's line of high-performance transducers, designed to deliver high-quality sound reproduction across a broad range of applications. This loudspeaker driver is particularly noted for its impressive bass response and overall sound fidelity.

One of the key features of the FW137 is its exceptional frequency response. With a range extending from around 40 Hz to 4 kHz, it allows for a robust low-end performance that can accurately convey the warmth of bass instruments as well as the clarity required for mid-range vocal performances. The well-balanced response makes it a versatile choice for various audio setups, whether in home theaters, PA systems, or studio monitors.

The technology behind the FW137 includes a lightweight paper cone that contributes to its natural sound signature. This cone design allows for significant movement without distorting the audio quality, providing a level of responsiveness that is crucial for dynamic sound reproduction. Moreover, the use of a treated surround helps control the cone’s movement, preventing unwanted resonances that could color the sound.

Another essential characteristic of the FW137 is its power handling capacity. With a nominal power rating of 30 watts and a maximum power handling of 60 watts, it allows for a high degree of sound output without compromising performance. This is particularly beneficial in high-volume settings, where distortion can often become an issue with lower-quality drivers.

The FW137 also features a well-designed voice coil and magnet structure, ensuring efficient energy conversion and heat dissipation. This means it can perform reliably even during extended periods of use, making it suitable for both casual listening and professional applications.

In summary, the Fostex FW137 embodies a combination of advanced engineering, quality materials, and thoughtful design. With its strong bass response, clear mid-range, and robust build, it stands out as an excellent choice for those seeking high fidelity in their audio reproduction. Whether for personal projects or in professional environments, the FW137 delivers consistency and performance that audio professionals can trust.