Beyma 4FR40 User guide

www.beyma.com

KEY FEATURES

● 4” full-range compact ferrite loudspeaker

● 80 W program power

● Extended response and low distortion

● Paper cone and SantopreneTM surround

● Pressed steel basket

● Ceramic magnet

● Ideal for beam-steering application (columns), portable
array and compact applications

4FR40

FULL RANGE FREQUENCY TRANSDUCER

Preliminary Data Sheet

TECHNICAL SPECIFICATIONS

Nominal diameter
Rated impedance
Minimum impedance
Power capacity*
Program power
Sensitivity

87 dB 1W / 1m @ Z

Frequency range
Voice coil diameter

20,3 mm 0,8 in

Bl factor
Moving mass
Voice coil length
Air gap height

THIELE-SMALL PARAMETERS**

Resonant frequency, f
D.C. Voice coil resistance, R
Mechanical Quality Factor, Q
Electrical Quality Factor, Q
Total Quality Factor, Q
Equivalent Air Volume to Cms, V
Mechanical Compliance, C
Mechanical Resistance, R
Efficiency, η0
Effective Surface Area, S
Maximum Displacement, X
Displacement Volume, V
Voice Coil Inductance, Le @ 1 kHz

s

e

ms

es

ts

as

ms

ms

d

***

max

d

100 mm 4 in

8 Ω

7,3 Ω

40 W

AES

80 W

100 - 20.000 Hz

4,2 N/A

0,0044 kg

7,7 mm

5 mm

92 Hz

6,4 Ω

11,3
0,96
0,88
2,8 l

668 µm / N

0,23 kg / s

0,22 %

0,0055 m

3 mm

11 cm

0,2 mH

DIMENSION DRAWINGS

N

MOUNTING INFORMATION

Overall diameter
Bolt circle diameter
Baffle cutout diameter:

- Front mount
Depth
Net weight
Shipping weight

2

Notes:

3

* The power capacity is determined according to AES2-1984 (r2003) standard. Program power
is defined as the transducer’s ability to handle normal music program material.

** T-S parameters are measured after an exercise period using a preconditioning power test.
The measurements are carried out with a velocity-current laser transducer and will reflect the
long term parameters (once the loudspeaker has been working for a short period of time).

*** The X
Hag is the air gap height.

is calculated as (Lvc - Hag)/2 + (Hag/3,5), where Lvc is the voice coil length and

max

118,2 mm 4,65 in

108,2 mm 4,26 in

92 mm 3,62 in

60 mm 2,36 in
0,55 kg 1,21 lb
0,75 kg 1,65 lb

www.beyma.com

Polígono Industrial Moncada II ▪ C/. Pont Sec, 1c ▪ 46113 MONCADA - Valencia (Spain)

▪ Tel.: [phone] ▪ Fax: [phone] ▪ http://www.beyma.com ▪ E-mail: [e-mail] ▪

4FR40

FULL RANGE FREQUENCY TRANSDUCER

Preliminary Data Sheet

LOW & MID FREQUENCY TRANSDUCER

[Ω]

FREE AIR IMPEDANCE CURVE

[Hz]

FREQUENCY RESPONSE CURVE

OFF-AXIS FREQUENCY RESPONSE

[dB]

[Hz]

[dB]

[Hz]

Note: On axis frequency response measured with loudspeaker

standing on infinite baffle in anechoic chamber, 1W @ 1m