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 |
| 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
References
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