KEY FEATURES

●    High power handling and low distortion 18” subwoofer
●    Exclusive Malt Cross® Technology Cooling System
●    Low power compression losses
●    High sensitivity: 97 dB (1W / 1m)
●    FEA optimized ceraminc magnetic circuit
●    Ultra low air noise
●    Optimized linear behaviour
 
●    Weatherproof cone with treatment for both sides
●    Double silicone spider
●    4” DUO double layer in/out copper voice coil
●    Aluminium demodulating ring
●    Extended controlled displacement: Xmax ± 11 mm
●    48 mm peak-to-peak excursion before damage
●    Optimized for direct radiation and band-pass subwoofer applications
 

TECHNICAL SPECIFICATIONS

Nominal diameter    460 mm    18 in    Resonant frequency, fs    32 Hz
Rated impedance    8 Ω    D.C. Voice coil resistance, Re    5,3 Ω
Minimum impedance    5,8 Ω    Mechanical Quality Factor, Qms    12,2
Power capacity 1    1.200 WAES    Electrical Quality Factor, Qes    0,39
Program power 2    2.400 W    Total Quality Factor, Qts    0,38
Sensitivity    97 dB    1W / 1m @ ZN    Equivalent Air Volume to Cms, Vas    277 l
Frequency range    40 - 1.000 Hz    Mechanical Compliance, Cms    0,124 mm / N
Recom. enclosure    Vb =  172 l    Mechanical Resistance, Rms    3,2 kg / s
(Bass/reflex design)    Fb = 42 Hz    Efficiency, η0    2,2 %
Voice coil diameter    101,6 mm    4 in    Effective Surface Area, Sd    1255 cm2
Bl factor    23,2 N/A    Maximum Displacement, Xmax 4    11 mm
Moving mass    200 g    Displacement Volume, Vd    1,3 l
Voice coil length    27 mm    Voice Coil Inductance, Le    1,21 mH
Air gap height    12 mm        
Xdamage (peak to peak)    48 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.

 
[Hz]
Note: Frequency response measured with loudspeaker standing on infinite baffle in anechoic chamber, 1W @ 1m
 

Frequency response on axis