Selenium 8MB4P 8" Woofer / Midbass Speaker

Brand:|Model: 8MB4P
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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List Price$115.80
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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.


Selenium 8MB4P 8" Woofer / Midbass Speaker

Product Q&A

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Selenium 8MB4P 8" Woofer / Midbass Speaker

hi' I would like to know how well these drivers would compare to the B&W 802 series 2 drivers as I intend using it in those boxes. Can you recommend 6 inch mids and suitable tweeters to compliment these drivers, Regards

Asked by: Hondvanklippies
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-09-18

Can I use these 8mb4p as a door speakers for my car and if I use a jl audio amp 300 4v3 to power it would it sound good and loud clean this amp can put out 8ohms bridged please help I'm not that familiar with ohms and hz as much info as possible thanks

Asked by: pattycake
Yes, you could go that route, but may I suggest something that would work much better. First let's talk about your amp. JL Audio Slash 300/4v3. It's a 4-channel car amplifier, rated 75 watts RMS (continuous power) by 4 speakers at 1.5 to 4 ohms. Bridged (your manual will have instructions on how to do that)  is rated at 150 watts RMS by 2 channels at 3 to 8 ohms. That is a little confusing in the description. Usually if it's rated at 150 watts at 4 ohms, the rating drops with a greater resistance, so at an 8 ohm load, the RMS rating would drop to 75 watts each, by two channels or speakers. This amp would put out twice the power if you stick with a 4 ohm speaker. The speaker's in question (Selenium 8MB4P 8" Woofer / Midbass Speaker) are rated at 250 watts RMS. So this amp would not be powerful enough to drive these speakers anywhere near their full potential even if bridged. The low-pass or bass is rated at 80 hz. Most of your good boom-boxes are rated at 30 to 50 Hz. So it would be a good mid-bass speaker, but not a good choice for a subwoofer, and considering the cost, I would go with something more efficient. For your amp (bridged) I would suggest the "Tang Band W8-1853 8" Neodymium Poly Woofer" they sold for around $200.00 new, now they are clearance at $75.00, so you better act fast! LOL!  Now, let me say I do not work for this company, I am a good customer, and answer a lot of automotive questions as I have been installing car systems for some 30 years. Now back to the Tang Band speaker. It is rated at 4 ohms and 100 watts RMS, so your amp will have plenty of power to push these to the limit. They will handle 250 watts max so your in good shape there as well, they will distort the sound long before you blow the coils out. Another thing, they are rated at 37 to 350 Hz! Excellent for a great subwoofer. You will have to put foam adhesive strips behind the mounting surface if mounting them from the outside of your door panel.. You will also need some sound damping materiel mounted behind the speaker to keep your doors from rattling. I hope this shed some light on your questions. If there is anything else, I will respond as soon as I can. Best of luck on your project!
Answered by: Scotteedog
Date published: 2015-03-17

How would this sound as a midrange speaker?

looking for a high end midrange that will be in a custom 3-way front tower to do mixed duties like music (mixed genre) and home theatre, this system needs to be able to be VERY loud for music and have accurate sound for home theatre.Your help with this is appreciated!!!
Asked by: 12c4u
This would work very well as a midrange speaker in an application like that. It will handle its full rated power as long as it is high-passed around 350 Hz or higher.
Answered by: MattP
Date published: 2013-06-03
  • 2015-11-27T06:43CST
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