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BF-8R
LOW FREQUENCY TRANSDUCER
KEY FEATURES
● 100 W program power
● Sensitivity: 90 dB (1W / 1m)
● Foam surround for extended bass response
● Ferrite magnet
● Steel basket
● Smooth and flat response
● Low distortion
● Extended controlled displacement: X
max
± 5,7 mm
● Suited for bass and midbass applications, sealed or vented
small cabinets
TECHNICAL SPECIFICATIONS
Nominal diameter
Rated impedance
Minimum impedance
Power capacity
Program power
1
2
Sensitivity
Frequency range
Recom. enclosure vol.
Voice coil diameter
Bl factor
Moving mass
Voice coil length
Air gap height
X
damage
Notes:
1
The power capaticty is determined according to AES2-1984 (r2003) standard.
2
Program power is defined as power capacity + 3 dB.
3
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).
4
The X
(peak to peak)
is calculated as (Lvc - Hag)/2 + (Hag/3,5), where Lvc is the voice coil length and Hag is the air gap height.
max
200 mm 8 in
8 Ω
6,8 Ω
50 W
RMS
100 W
90 dB 1W / 1m @ ZN
30 - 6.000 Hz
15 / 40 l 0,5 / 1,4 ft3
25,4 mm 1 in
5,9 N/A
0,021 kg
14 mm
6 mm
21 mm
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, L
THIELE-SMALL PARAMETERS
s
e
ms
es
ts
as
ms
ms
d
4
max
d
e
3
52 Hz
5,5 Ω
29,6 l
438 µm / N
1,3 kg / s
0,36 %
0,022 m
5,7 mm
110 cm
0,8 mH
5,5
1,1
0,9
2
3
Acústica Beyma SL - P.I. Moncada II, C/ Pont Sec, 1C - 46113 Moncada, Valencia (Spain) - Tel. +34 96 130 13 75 - beyma@beyma.com
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BF-8R
LOW FREQUENCY TRANSDUCER
[dB]
MOUNTING INFORMATION
Overall diameter
Bolt circle diameter
[Ω]
[Hz]
Note: Frequency response measured with loudspeaker standing
on infinite baffle in anechoic chamber, 1W @ 1m
DIMENSION DRAWING
205 mm 8,1 in
196 mm 7,7 in
Baffle cutout diameter:
- Front mount
Depth
Net weight
Shipping weight
Acústica Beyma SL - P.I. Moncada II, C/ Pont Sec, 1C - 46113 Moncada, Valencia (Spain) - Tel. +34 96 130 13 75 - beyma@beyma.com
184 mm 3,3 in
86 mm 3,4 in
1,2 kg 2,6 lb
1,3 kg 2,9 lb
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