18P80/Nd
18P80/Nd
18P80/Nd
LOW FREQUENCY
TRANSDUCER
KEY FEATURES
•
•
•
•
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Real 800 w AES power handling
Superb sensitivity: 100 dB
4" duo technology voice coil
Carbon fiber reinforced paper cone
Neodymium magnet
TECHNICAL SPECIFICATIONS
Nominal diameter
Rated impedance
Minimum impedance
Power capacity*
Program power
Sensitivity
Frequency range
Recom. enclosure vol.
Voice coil diameter
Magnetic assembly weight
BL factor
Moving mass
Voice coil length
Air gap height
X damage (peak to peak)
460 mm. 18 in.
8 ohms
5.8 ohms
800 w AES
1600 w
100 dB 2.83v @ 1m @ 2p
25 - 4000 Hz
80 / 200 l 2.8 / 7 ft.3
100 mm. 4 in.
4.62 kg 10.16 lb.
21.9 N / A
0.146 kg.
20 mm
12 mm
52 mm
DIMENSION DRAWINGS
MOUNTING INFORMATION
THIELE-SMALL PARAMETERS**
Resonant frequency, fs
D.C. Voice coil resistance, Re
Mechanical Quality Factor, Qms
Electrical Quality Factor, Qes
Total Quality Factor, Qts
Equivalent Air Volume to Cms, Vas
Mechanical Compliance, Cms
Mechanical Resistance, Rms
Efficiency, ho (%)
Effective Surface Area, Sd (m2)
Maximum Displacement, Xmax***
Displacement Volume, Vd
Voice Coil Inductance, Le @ 1 kHz
30 Hz
5.1 ohms.
11.55
0.29
0.29
411 l
193 mm / N
2.34 kg / s
3.7
0.1225 m2
7.5 mm
918 cm3
1.9 mH
FREQUENCY RESPONSE AND DISTORTION
Overall diameter
Bolt circle diameter
Baffle cutout diameter:
- Front mount
- Rear mount
Depth
Volume displaced by driver
Net weight
Shipping weight
460 mm. 18.11 in.
438 mm. 17.24 in.
413 mm. 16.26 in.
400 mm. 15.75 in.
201 mm. 7.91 in.
13 l 0.46 ft.3
7 kg. 15.4 lb.
8.5 kg. 18.7 lb.
Notes:
*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 Xmax is calculated as (Lvc - Hag)/2 + Hag/3.5, where Lvc is the voice coil length and Hag is the air gap height.
FREE AIR IMPEDANCE CURVE
Note: on axis frequency response measured with loudspeaker standing on infinite baffle in anechoic
chamber, 1w @ 1m.
097
Polígono Industrial Moncada II · C/. Pont Sec, 1c · 46113 MONCADA - Valencia (Spain)
· Tel. ( 34 ) 96 130 13 75 · Fax ( 34 ) 96 130 15 07 · http://www.beyma.com · E-mail: beyma@beyma.com ·
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