TC Sounds 5400 18 User Manual

LMS-Ultra 5400 18”

(Specifications Manual)

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