TC Sounds LMS-Ultra 5400 18 - Manual (Page 2)

LMS-Ultra 5400 18”
Low Frequency Driver
Thiele Small & Driver Parameters
Parameter 18" LMS-Ultra 5400 Description
Qts 0.325 Total Q
Qes 0.34 Electrical Q
Qms 7.6 Mechanical Q
Fs 20 Hertz, Free Air Resonance
Res 3.78 Ohms, DC resistance
Ls 2.8 H, series inductance
Lp 3.4 H, lossy series inductance
Rp 3.3 Ohms, loss across Lp
Dia 390 m meters, effective
Vas 240 liters, air volume equivalent
mms 501 grams, effective mass
cms 120 um/N, compliance
bl 26.8 T*m, motor strength
SplSens 89.7 dBSPL max @1W absorbed
Parameter 18" LMS-Ultra 5400 Description
Geometric Stroke 33.7 Millimeters, (voice coil - gap) / 2
70% BL 38.1 Millimeters, BL is 0.7 original value (one way)
Xmech 47.6 Mechanical displacement limit (one way)
Long Term Power 2000 Watts
Program Power 8000 Watts, short term peak power limit
*Impedance and TS parameters measured with the coil in series.
*For full system alignment and enclosure recommendations, please visit our website: www.tcsounds.com