The TL-1601b has many of the traits of the TL-1601a such as low distortion and low coloration, but it has the added advantage of an eminently high input power of 500 watts. The unit is designed for professional applications including digital-recording monitoring systems and sound reinforcement systems for synthesizer music.
Voice Coil
To increase the input power the unit can handle, the bobbin for the voice coil has ventilation holes which help efficiently dissipate heat. The voice coil is a long-travel type to improve sensitivity and enable a high sound pressure level of 97.5dB (1W,1m). Pure, straightforward sound is assured thanks to the use of super-low-impedance OFC (Oxygen-free Copper) wire for leads.
Magnetic Circuit
Holes in the frame’s opening and the magnetic circuit serve to disperse heat quickly, boosting the unit’s maximum input power to 500 watts. High-quality magnetic material is used in the circuit to permit high magnetic flux density of 1.24T and increase the sound pressure level.
Diaphragm
A rugged, yet lightweight cone diaphragm is supported by a corrugated cloth surround coated with special damping agent and suspended by a highly linear suspension system. The result is high sensitivity, low distortion and uncolored sound reproduction.
Housing
A highly rigid die-cast aluminum frame minimizes resonance and vibration. Terminals are rugged binding types that allow the use of thick speaker cables.
TL-1601b Specification
Rated Impedance: 8 Ω
Frequency Range: 28-2,000 Hz
Highest Recommended Crossover: 900Hz
Rated Input Power: 200 W
Maximum Input Power: 500 W
Sound Pressure Level: 97.5 dB (1W, 1m)
Total Magnetic Flux: 2.77 x 10-3 Wb
Magnetic Flux Density: 1.24 T
Recommended Enclosure: 113 ～304 liter
Baffle Opening Diameter: 352 mm
Mounting Dimensions: 370 mm
Weight: 13 kg
Dimensions (diameter x depth): 400 x 191 mm
Theile-Small Parameters
Fs: Free Air Resonance Frequency: 28 Hz
Qms: Mechanical Q Factor: 6.8
Qes: Electrical Q Factor: 0.32
Qts: Total Q factor: 0.31
BL: Force Factor: 20.5 Tm
Mms: Mechanical Mass of Diaphragm and Free Air Load: 117 g
Mmd: Mechanical Mass of Diaphragm: 86 g
Cms: Mechanical Suspension Compliance: 2.76 x 10-4 m/N
Vas: Equivalent Acoustic Volume: 0.304 m3
Sd: Effective Piston Area: 0.0881 m2
Xmax: Max Linear Peak Excursion (0-P): 8.0 mm
Max: Excursion Before Damage (P-P): 36 mm
Vd: 705 cm3
Revc: Voice Coil Resistance: 6.6 Ω
Levc: Voice Coil Inductance at 1kHz – 1.7 mH
ηo: Relative Efficiency: 2.00%
Diaphragm repair parts
DP-1603
