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Selenium 8MB4P 8" Woofer / Midbass Speaker

Brand:|Model: 8MB4P|Part # 264-466

Although it is engineered primarily for use in direct radiator and horn-loaded midrange applications, the versatile Selenium 8MB4P 8" midbass speaker also doubles as a clean-sounding woofer for compact monitor systems that do not require massive bass output.
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Part # 264-466
  • Long fiber pulp cone and impregnated half-roll fabric surround for smooth response
  • Strong cast aluminum frame with epoxy coating
  • Low mass aluminum wire voice coil on polyimide former
  • Massive 45 oz. magnet provides high motor strength
  • Useable response from 80 to 5,000 Hz, flat from 160 to 1,600 Hz
  • Engineered for PA midbass applications, compact monitors, and bass guitar amps

Product Details

Selenium 8MB4P 8" Woofer / Midbass Speaker

The Selenium 8MB4P 8" Woofer/Midbass Speaker was designed for professional sound reinforcement applications. It features high power handling capacity, smooth and extended midrange response, excellent sensitivity, and admirable durability. The 8MB4P is capable of delivering articulate, extremely high SPL midrange output with a minimum of coloration or distortion.

Engineered for maximum versatility, the 8MB4P delivers great results when installed in compact closed or vented enclosures and horn-loaded designs. General construction details include a sturdy cast aluminum frame, impregnated cloth surround, optimized spider, and a large pole piece vent channel to reduce voice coil heat and increase power handling.

Although it is intended primarily for dedicated midrange coverage, the Selenium 8MB4P will also perform well as the low frequency component in compact 2-way monitor systems that do not require extended bass output.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)500 Watts
  • Impedance8 ohms
  • Frequency Response80 to 5,000 Hz
  • Sensitivity97 dB 2.83V/1m
  • Voice Coil Diameter1.85"
Thiele-Small Parameters
  • Resonant Frequency (Fs)105 Hz
  • DC Resistance (Re)5.5 ohms
  • Voice Coil Inductance (Le)0.66 mH
  • Mechanical Q (Qms)10.62
  • Electromagnetic Q (Qes)0.82
  • Total Q (Qts)0.76
  • Compliance Equivalent Volume (Vas)0.33 ft.³
  • Mechanical Compliance of Suspension (Cms)0.11 mm/N
  • BL Product (BL)9.5 Tm
  • Diaphragm Mass Inc. Airload (Mms)20g
  • Maximum Linear Excursion (Xmax)3.25 mm
  • Surface Area of Cone (Sd)250 cm²
Materials of Construction
  • Cone MaterialPaper
  • Voice Coil Wire MaterialAluminum
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter8.24"
  • Baffle Cutout Diameter7.17"
  • Depth3.9"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume1.04 ft.³
  • Sealed F3112 Hz
  • Vented Volume1.2 ft.³
  • Vented F363 Hz
Selenium 8MB4P 8" Woofer / Midbass Speaker
  • BrandSelenium
  • Model8MB4P
  • Part Number264-466
  • UPC7896359515776
  • Product CategoryPro Woofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Weight8.45 lbs.
  • California Prop 65

    Warning: California residents only. Please note per Proposition 65 that this product may contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.

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