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GF – 6643S COMPONENTS

3″ High-Resolution Midrange

Technical Specifications

Power Handling

Parameter Symbol / Type Value Unit
Rated Pink Noise Tested RMS 50 Watts
Peak Capacity Power Tested MAX 120 Watts
X-over : 2nd Order HPF Butterworth — 250 Hertz

Mounting Information

Parameter Symbol Value Unit
Overall Diameter OD 3.62 / 92 Inch / mm
Cutout Diameter CD 3.03 / 77 Inch / mm
Total Depth TD 2.02 / 52 Inch / mm
Mounting Depth MD 1.46 / 37 Inch / mm
Electrical Data
Parameter Symbol Value Unit
Nominal Impedance Zn 4.0 Ω
DC Resistance (±0.3Ω) Re 3.6 Ω
Maximum Impedance Zo 72.765 Ω
Minimum Impedance Zmin 4.354 Ω
Minimum Frequency Fmin 495.550 Hz
Voice Coil Inductance (1khz) Le 0.221 mH

T-S Parameters

Parameter Symbol Value Unit
Resonance Frequency Fs 122.942 Hz
Mechanical Q Factor Qms 8.937 —
Electrical Q Factor Qes 0.452 —
Total Q Factor Qts 0.430 —
Force Factor BL 4.875 T-M
Mechanical Resistance Rms 0.343 Ns/M
Moving Mass without Air Load Mmd 3.869 g
Moving Mass within Air Load Mms 3.970 g
Suspension Compliance Cms 0.422 mm/N
Effective Piston Area SD 31.172 cm²
Equivalent Volume Vas 0.583 Ltr
Reference Efficiency No 0.232 %
Frequency Response (±3db) Free Air 150~8000 Hz
Sensitivity @1W/1M (±1.5db) E 87.2 db

Mechanical Data

Parameter Symbol Value Unit
Voice Coil Diameter Id 1.0 / 25.5 Inch / mm
Voice Coil Former VCfm KSV (500 HPP-ST) —
Voice Coil Wire Composition — OFC —
Voice Coil Winding Length h 5.1 mm
Voice Coil Layers n 4 Bifilar
Magnetic Material — Neodymium —
Magnet Grade MG N45 —
Magnet Quantity MQ 12 pcs
Magnetic Flux Density HG N/A Tesla
Magnetic Gap Height HE 8.0 mm
Linear Excursion P-P 2.9 mm
Max Mech. Excursion P-P ±8.4 mm
Unit Weight UW 465 Grams

Description

Features

CRYSTAL CLEAR VOCALS: A HARMONIOUS BLEND OF PRECISION ACOUSTIC TECHNOLOGY AND REFINED CRAFTSMANSHIP FOR AN UNPARALLELED LISTENING EXPERIENCE

DEEP, PUNCHY BASS OUTPUT: ENGINEERED TO DELIVER POWERFUL LOW FREQUENCIES WITH ABSOLUTE CONTROL, DEPTH AND DYNAMIC IMPACT

ADVANCED AIR COOLING: INTELLIGENTLY ENGINEERED VENTILATION SYSTEM DESIGNED TO MAXIMIZE AIRFLOW AND MAINTAIN OPTIMAL THERMAL STABILITY

RUGGED BUILD COMPONENTS: PRECISION – MACHINED STRUCTURAL ELEMENTS DESIGNED TO WITHSTAND EXTREME DRIVING AND HIGH-POWER PERFORMANCE

DURABILITY-FOCUSED DESIGN: BUILT TO WITHSTAND DEMANDING CONDITIONS WHILE MAINTAINING ACOUSTIC INTEGRITY AND PERFORMANCE STABILITY