Designed specifically to handle the increased average power that today's amplifiers deliver. In terms of sound, emphasis is placed on low distortion and low coloration.
VOICE COIL A high maximum input of 500 watts is achieved through the use of an edgewise-wound, long-travel voice coil. Making more use of the flux within the magnetic gap, this voice coil provides higher transducing efficiency. Moreover, high linearity is maintained over a long distance for lower distortion. Both the voice-coil bobbin and the adhesive are made of a highly heat-resistant material to permit high maximum input.
MAGNETIC CIRCUIT Weighing 2kg (4.4 lbs.), a powerful ferrite magnet combines a high flux density of 11,800G and low distortion. This, along with a long-travel voice coil and new rear suspension design, contributes to the high operating efficiency of 97dB/W (1m).
DIAPHRAGM Rigidity and light weight of the diaphragm permits the unit to withstand high-amplitude inputs for low-distortion output. The corrugated cloth surround is coated with a damping material to make diaphragm movement more linear and discourage cone breakup.
HOUSING Warp-proof and non-resonating, the heavy die-cast aluminum frame precisely centers the diaphragm for accurate low-distortion sound reproduction.
CROSSOVER We recommended that the dividing network (low-pass filter) for the TL-1603 use a crossover frequency of 900Hz or lower, and a attenuating slope of 12dB/oct. or 18dB/oct.

Specifications

General	TL-1603
Nominal Impedance	8 Ohm
Lowest Resonance Frequency (Fo)	28 Hz
Frequency Range	28-2000 Hz
Rated Input Power	200 W
Maximum Input Power	500 W
Sound Pressure Level	97 dB/W (1m)
Total Magnetic Flux	260.000 Mx
Magnetic Flux Density	11.800 G
Highest Recommended Crossover	1.200 Hz
Recommended Enclosure	113 - 304 liter
Effective Piston Diameter	335,0 mm
Baffle Opening	352,0 mm
Mounting Dimensions	370,0 mm
Weight	9,5 kg
Dimensions (diameter x depth)	400 x 148 mm
Theile-Small Parameters	TL-1603
sd - Piston Area	0,0881 Sq M
Revc - DV Voice Coil Resistance	7 Ohm
Levc - Voice Coil Inductance 1kHz (mH)	1,6
BL - Flux Density (TM)	19,5
Vas - Equivalent Acoustic Volume (Liter)	304 liter
Cms - Mechanical Suspension Compliance (x 10-4 m/N)	2761
Mms - Mechanical Mass of Cone and Free Air Load	117 g
Mmd	86 g
Fs - Free Air Resonance Frequency	28 Hz
Qms - Mechanical Q Factor	6,8
Qes - Electrical Q Factor	0,36
Qts - Total Q factor	0,34
Xmax - Max Linear Peak Excursion (O-P)	8,0 mm
Pmax - RMS Thermal power Limit	500 W
no - Relative Efficiency	1,81 %
Vd (cm²)	405
Max. Excursion Before Damage (P-P)	36,0 mm

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