beyma Low Frequency Transducer Instructions

**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:

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 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

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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References

• Acústica Beyma - Fabricante Altavoces Profesionales desde 1969

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