B&C 8BG51 8" Neodymium Woofer

Brand:| Model: 8BG51
The B&C Speakers 8BG51 8" cast frame neodymium driver features a long throw 2" voice coil and rubber half-roll cone surround, which enable it to produce serious amounts of bass in compact pro loudspeaker enclosures.
  • Rubber half-roll cone surround
  • Neodymium magnet assembly
  • Ventilated voice coil gap for reduced power compression
  • 2" copper voice coil on fiberglass former
  • Copper cap on pole piece reduces inductance and extends HF
  • 500 watts continuous program power capacity
  • 50 – 4,000 Hz response
Part # 
Weight: 4.85 lbs.  
Due In: 4/6/2015
List Price$199.96
You Save40%
Your Price
Part # 294-696
Qty:  EA
Available Payment Methods

Product Details

B&C 8BG51 8" Neodymium Woofer

B&C's 8BG51 8" neodymium woofer is fitted with an optimized paper cone and rubber half-roll surround, and strikes a fine balance between bass output and overall efficiency. The 8BG51's ventilated voice coil gap ensures long term power handling and reduced power compression, and a copper cap on the pole piece reduces high frequency-degrading inductance. Highly recommended for compact 2-way speaker systems.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)500 Watts
  • Impedance8 ohms
  • Frequency Response50 to 4,000 Hz
  • Sensitivity92 dB 1W/1m
  • Voice Coil Diameter2"
Thiele-Small Parameters
  • Resonant Frequency (Fs)52 Hz
  • DC Resistance (Re)5.1 ohms
  • Voice Coil Inductance (Le)0.5 mH
  • Mechanical Q (Qms)12.3
  • Electromagnetic Q (Qes)0.42
  • Total Q (Qts)0.4
  • Compliance Equivalent Volume (Vas)0.63 ft.³
  • BL Product (BL)11.8 Tm
  • Diaphragm Mass Inc. Airload (Mms)35g
  • Maximum Linear Excursion (Xmax)6.5 mm
  • Surface Area of Cone (Sd)220 cm²
Materials of Construction
  • Cone MaterialPaper
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerFiberglass
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialNeodymium
Mounting Information
  • Overall Outside Diameter8.8"
  • Baffle Cutout Diameter7.4"
  • Depth3.5"
  • Bolt Circle Diameter8.3"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.21 ft.³
  • Sealed F3102 Hz
  • Vented Volume0.53 ft.³
  • Vented F355 Hz
B&C 8BG51 8" Neodymium Woofer
  • BrandB&C Speakers
  • Model8BG51
  • Part Number294-696
  • UPC844632086236
  • Product CategoryWoofers, Subwoofers & Midrange Speakers
  • Unit of MeasureEA
  • Product Rating
    (3 Reviews)
  • Weight4.85 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.

Similar Products

View similar products to the B&C 8BG51 8" Neodymium Woofer
in the Woofers, Subwoofers & Midrange Speakers product category.


B&C 8BG51 8" Neodymium Woofer
B&C 8BG51 8" Neodymium Woofer is rated 5.0 out of 5 by 3.
Rated 5 out of 5 by from Excellent woofer!I am using a pair of these in a custom box and they sound fantastic!
Date published: 2015-02-03
Rated 5 out of 5 by from Premium Driver For Line ArraysWe use these as our premium driver for our line array cabinets. They have good power handling and extension. The octagonal basket makes them quite sturdy and easy to mount close together in a multiple driver alignments. This driver is articulate and clean even when driven hard. It also has ability to deliver a level of clarity in the vocal range that we have found in few other drivers.
Date published: 2012-05-04
Rated 5 out of 5 by from Great speakersThese are the best speakers I have used to date ,the problem is ,I like to flush mount the speaker to the cabinet face but the rim design makes it impossible for me as a hobbyists to do .I would suggest that The boys at B&C redesign the frame to a round configuration also there are casting marks on the frame which makes them look cheap. I believe a speakers should look as good as they sound .
Date published: 2011-03-31
  • 2015-03-29T06:46CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_3
  • loc_en_US, sid_294-696, PRD, sort_mostRecent
  • clientName_PartsExpressInternational

Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
B&C 8BG51 8" Neodymium Woofer

Will it work good sealed

Would this driver perform well in a sealed enclosure playing down to 50hz (car audio application)? I know it works in a ported box but it will be tricky getting the recommended amount of cubes and the port length in an odd shaped enclusre.
Asked by: fyalinks
Yes you will be able to get 50 Hz from this sealed but probably not much lower. In a car application this should be relatively easy.
Answered by: MattP
Date published: 2013-02-26
  • 2015-03-29T07:28CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.1
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_1
  • loc_en_US, sid_294-696, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational

Customer Projects

Customer projects that include: B&C 8BG51 8" Neodymium Woofer

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

Discussions in our TechTalk Forum that include: B&C 8BG51 8" Neodymium Woofer

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.

Recently Viewed Products

Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH 45066USA

© 1996-2015 Parts Express, All Rights Reserved

Live Chat Software