beyma Low Frequency Transducer Instructions
- June 7, 2024
- beyma
Table of Contents
**beyma Low Frequency Transducer Instructions
**
KEY FEATURES
-
High sensitivity: 98 dB
-
High power handling: 400 WAES
-
3” copper voice coil
-
Optimum winding length for increased linear excursion.
-
Extremely linear frequency response
-
Extended response in the medium frequency range
-
Low harmonic distortion
-
High power woofer and midbass applications
TECHNICAL SPECIFICATIONS
Nominal diameter|
380 mm 15 in
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Rated impedance|
8 Ω
Minimum impedance|
7,2 Ω
Power capacity 1|
400 WAES
Program power 2|
800 W
Sensitivity|
98 dB 1W / 1m @ ZN
Frequency range|
35 – 3.000 Hz
Recom. enclosure|
Vb = 75 l
(Bass-reflex design)|
Fb = 48 Hz
Voice coil diameter|
76,2 mm 3 in
Bl factor|
17,4 N/A
Moving mass|
0,086 kg
Voice coil length|
17,5 mm
Air gap height|
7 mm
Xdamage (peak to peak)|
30 mm
Notes:
- The power capaticty is determined according to AES2-1984 (r2003) standard.
- Program power is defined as power capacity + 3 dB.
- 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 Xmax is calculated as (Lvc – Hag)/2 + (Hag/3,5), where Lvc is the voice coil length and Hag is the air gap height.
THIELE-SMALL PARAMETERS3
| Resonant frequency, fs | 35 Hz |
|---|---|
| D.C. Voice coil resistance, Re |
6,4 Ω
Mechanical Quality Factor, Qms|
8,5
Electrical Quality Factor, Qes|
0,40
Total Quality Factor, Qts|
0,38
Equivalent Air Volume to Cms, Vas|
267 l
Mechanical Compliance, Cms|
243 µm / N
Mechanical Resistance, Rms|
2,2 kg / s
Efficiency, η0|
2,7 %
Effective Surface Area, Sd|
0,088 m2
Maximum Displacement, Xmax 4|
7,25 mm
Displacement Volume, Vd|
638 cm3
Voice Coil Inductance, Le|
1,2 mH
Note: Frequency response measured with loudspeaker standing on infinite baffle in anechoic chamber, 1W @ 1m
MOUNTING INFORMATION
Overall diameter|
388 mm
|
15,3 in
---|---|---
Bolt circle diameter|
370 mm
|
14,6 in
Baffle cutout diameter:
Baffle cutout diameter:|
352 mm
|
13,9 in
Depth|
156 mm
|
6,1 in
Net weight|
6,5 kg
|
14,3 lb
Shipping weight|
7,4 kg
|
16,3 lb
DIMENSION DRAWING
Documents / Resources
|
beyma Low Frequency
Transducer
[pdf] Instructions
Low Frequency Transducer, SM-115 N
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