21" (533 mm) "Ventuno" 1600 Watt Subwoofer

Brand Name
Oaktron by MISCO
Model #
Part #
In stock

Ventuno is 21 (in Italian) but this one isn't made in Italy. We put it together right here where in live in the heartland of America. This one is our "Grande Magnum Opus" - the one that will press your shirt against your body.  If you want to feel all the Bass, this one is for you.  Its primary application is to be used as a subwoofer. With proper construction it could also be used as a woofer in a system. It’s designed to handle a whopping 1600 watts of program power.  It features an engineered black treated cone with a treated cloth M-roll surround.  

  • 1600 Watts, program power
  • Engineered black treated cone
  • Huge High Energy Ferrite magnet 
  • With M-Roll Cloth Edge surround
  • Black powder coat Die Cast Aluminum Frame
  • 4-inch Voice Coil with Dual 8" Conex Spider Suspension System

MISCO engineers test and analyze the performance of these speakers using the world's most sophisticated loudspeaker measurement systems including the Klippel Analyzer and the Klippel QC, which are used to validate final design.  Oaktron by MISCO is the premium line of high performance, ready-to-ship transducers for a wide variety of applications including high fidelity, musical instrument, automotive and many more. From elegantly simple to highly specialized designs for unique and demanding applications, there is an Oaktron loudspeaker perfectly suited for your needs.

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More Information
Brand Name Oaktron by MISCO
Model # 533-WF04-01
Height 10.0000
Width 21.0000
Length 21.0000
Size, Nominal (inch & mm) 21" (533 mm)
Shape of Speaker Round
Speaker Type Subwoofer
Application High-End Audio and Home Theater, Home Audio, Indoor, Military, Pro Sound
Environment Indoor
RoHS Compliant Yes
Nominal Impedance (Z) (Ω) 4
Rated Power IEC268-5 (W) 800 Watts
Rated impedance (Ω) 4
Power, Continuous (W) 800
Power, Program (W) 1600
Frequency range (Hz) 20 - 500
Sensitivity (dB SPL) ¹ 95
Resonant Frequency (Fs) (Hz) 32
DC resistance (Re) (Ω) 3.7
Voice Coil Inductance (Le) (mH) 1.47
Mechanical Q factor (Qms) 12.35
Electrical Q Factor (Qes) 0.55
Total Q factor (Qts) 0.53
Mechanical Resistance (Rms) (kg/s) 5.51
Compliance equivalent volume (Vas) (L) 306.90
Suspension Compliance (Cms) (mm/N) 0.07
Surface area of diaphragm (Sd) (cm²) 1720.21
Moving mass (Mms) (gm) 338.49
Magnetic Gap Height (mm) 12.7
Coil winding height (mm) 25.0
Maximum linear excursion (Xmax) (mm) 6.2
Motor Force Factor (BL) (T•M) 21.3
Efficiency (η₀) (%) 1.74
Efficiency Bandwidth Product (EBP) (Fs/Qes) 57.97
Basket type Cast aluminum, powder coat black finish
Terminal size Push style spring terminals
Voice coil diameter (mm) 100
Voice Coil Winding Single layer
Magnet Material Ferrite
Magnet weight (gm) 3124
Cone body material Engineered paper pulp with water-resistant lacquer treat
Cone surround material Treated cloth, m-roll style
Dust cap material Engineered paper pulp with water-resistant lacquer treat
Spider Material Dual conex spiders
Net weight (kg) 13.15
Technical Notes

¹ Sensitivity is measured with 2.83 volt input, measured on-axis at 1 meter distance