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6-1/2" Poly Cone Midbass Woofer 4 Ohm

Brand:|Part # 299-609
This buyout 6-1/2" woofer is the perfect replacement for worn, tired sealed bookshelf speakers. The extended frequency response allows it to mate well with tweeters without a low pass filter. Save nearly 60% off the original retail price through this Parts Express exclusive buyout.
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List Price$26.00
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Part # 299-609
  • Smooth, natural response doesn't require a low-pass filter
  • Decent Xmax for good bass response
  • Designed for use in sealed cabinets
  • Save nearly 60% off the original retail price!

Product Details

6-1/2" Poly Cone Midbass Woofer 4 Ohm

This durable 6-1/2" poly cone woofer with rubber surround is designed to work best in small, sealed bookshelf-style cabinets. The damped poly cone creates smooth sound from 45 Hz all the way up to 3,000 Hz and is easy to integrate with many different tweeters, and the 4 ohm impedance extracts more current from an amplifier for twice the output (3 dB increase), when compared to a similar 8 ohm speaker.

A 1" voice coil is combined with an aluminum former for a power handling rating of 30 watts RMS and 60 watts max, and the "Q" of the motor is such that solid bass performance can be achieved in cabinets as small as 0.25 cubic feet, with an f3 of 63 Hz (with a 1/4 pound of acoustic fill).

Save over 50% off the original price through this exclusive factory buyout. 

Product Specifications
  • Nominal Diameter6-1/2"
  • Power Handling (RMS)30 Watts
  • Power Handling (max)60 Watts
  • Impedance4 ohms
  • Frequency Response50 to 6,000 Hz
  • Sensitivity88.3 dB 2.83V/1m
  • Voice Coil Diameter1"
Thiele-Small Parameters
  • Resonant Frequency (Fs)52 Hz
  • DC Resistance (Re)3.37 ohms
  • Voice Coil Inductance (Le)0.48 mH
  • Mechanical Q (Qms)2.99
  • Electromagnetic Q (Qes)1.4
  • Total Q (Qts)0.95
  • Compliance Equivalent Volume (Vas)0.65 ft.³
  • Maximum Linear Excursion (Xmax)3.5 mm
Materials of Construction
  • Cone MaterialPoly
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerAluminum
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter6.5"
  • Baffle Cutout Diameter5.625"
  • Depth2.875"
  • Bolt Circle Diameter6.125"
  • # Mounting Holes4
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume1.53 ft.³
  • Sealed F349 Hz
  • Vented Volume3.64 ft.³
  • Vented F330 Hz
6-1/2" Poly Cone Midbass Woofer 4 Ohm
  • BrandFactory Buyouts
  • Part Number299-609
  • UPC848864006864
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (50 Reviews)
  • Weight1.8 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.

View similar products to the 6-1/2" Poly Cone Midbass Woofer 4 Ohm
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6-1/2" Poly Cone Midbass Woofer 4 Ohm
6-1/2" Poly Cone Midbass Woofer 4 Ohm is rated 4.54 out of 5 by 50.
Rated 5 out of 5 by from Nice project speakersI had some spare mdf and was given the ok to put some speakers in the shop at work. Decided to make some towers 2.0cf for the four after displacement. Mated with a vifa BC25SC06-04 tweeter. Crossover of 2800hz 2nd order. These sound pretty good almost decided to keep them for home but I have a nice setup already. I might buy more soon.
Date published: 2016-01-28
Rated 5 out of 5 by from Mine have different parametersThese seem to be very nice speakers and very good value. I bought mine to use as door speakers in an auto application and thought the high "Q" would work well in my infinite baffle application. The drivers I got had the following parameters which are quite a bit better than the published specs. I ordered four and all were around plus or minus 5%. The following figures are after about 8 hours of break in at 25 Hz.Peak Instruments340 E. First StreetDayton OH 45402Raw Driver or Closed Box ResultsFs is 52.0833 Hertz Qts is 0.5711cone area is 0.0133 m^2 Qes is 0.7223Vas is 0.4279 cubic feet Qms is 2.7276Vas is 12.1220 litresRe is 3.8365 ohms Rm is 18.3242 ohms R1 is 8.3845 ohmsVoice Coil Inductance Le is 0.5612 mHEfficiency is 85.58 dB 1w/1m BL is 5.77 Tesla metersCm is 487.262 microns/Newton Mm is 19.1691 gramsRm (mechanical) is 2.300 mechanical ohms (Ns/m)I think there must have been more than one model of driver in the buyout lot. Just thought I'd let folks know my findings.
Date published: 2015-11-30
Rated 4 out of 5 by from good price, decent driverfor a set of shop speakers, i used 8 of these teamed up 8 mylar tweeters, for both the left and right channels. total of 16 mid-woofers and 16 tweeters. each woofer sees about .35 cubic feet. powered by a cheap Behringer Inuke 1000, all in all, they rock! No, you wont hit the bottom octaves, but bass is punchy and tight. not crossing over the woofers, the natural roll off blends pretty good with the tweeters. Excursion is very good, down to about 40Hz. too much below that and they fall on there face...... but hey, for the price and perormance, you wont go wrong
Date published: 2015-11-25
Rated 2 out of 5 by from B652 Replacement WoofersI bought these to replace the woofers in my B652 bookshelf speakers. I wanted to add more bass so I thought I would try them. I go & remove the woofers from my B652 bookshelf speaker cabinets & what do you know? These are the exact same model speakers that I already have. The same model number on the back of the magnet proves it. Not what I was expecting, but they work as advertised. I used them in different .45 cu. ft. boxes instead & ported them. They sound way better in a ported box then sealed if you ask me, even if they are recommend for sealed boxes. Good price & fine replacement speaker.
Date published: 2015-11-07
Rated 5 out of 5 by from Great sound and bassI used a Lepy LP-838 amplifier and with the super bass, the woofer can flex! They sounds really great. Love them. Would recommend this to EVERYONE who likes speakers.
Date published: 2015-11-02
Rated 5 out of 5 by from Bargain basement yet well made speakerUsing these for an experimental vertical array scheme. 12 units in each column and 4 columns for a total of 48 drivers. Boxes are 8 feet tall 12 inches wide (MDF) and sides are 6 inches deep (2X6 fir). I know a lot of folks seem to think vertical arrays are too sweet spot dependent, But I'm the only listener. Lots of fun and the price to build them is pretty low all things considered.Bob, KE6F
Date published: 2015-10-28
  • 2016-02-12T06:17CST
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  • cp_1, bvpage1
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  • clientName_PartsExpressInternational

Product Q&A

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6-1/2" Poly Cone Midbass Woofer 4 Ohm

The specs read that the sealed volume for this driver should be 1.53 ft.³ If I intend to mount two of these in a single closed cabinet, should I double that volume?

Asked by: euraquilo
yes, that would be the best sealed alignment for two of them.
Answered by: Chrisf
Date published: 2016-02-10

I'd like to use these in an automotive application. Is it OK to run these without a low-pass filter and just use an appropriate capacitor inline with the tweeter?

Asked by: Matt_T
Yes, that is very commonly done and would be fine for this driver.
Answered by: Chrisf
Date published: 2016-02-01

Would this work as a replacement driver in an in-wall speaker? I see it is best suited for a small box, whereas an in wall installation is a pretty big box.

Asked by: Niqjh64
This will work well for an in-wall application as long as the original speaker was 4 ohms.
Answered by: MattP
Date published: 2016-01-27

Does anyone know the sensitivity of this driver?  I want to use them in an automotive application with the AMT tweeter.  Any thoughts on how much (if any) I'll need to pad the AMT Tweet?

Asked by: jprocks
This driver is 88.3 dB 2.83v/1M.
Answered by: MattP
Date published: 2015-12-29

Can you use these in a car?  Are the automotive speakers made from different materials to resist heat / cold extremes better ? Thanks

Asked by: echo1
Yes these can be used in a vehicle. There is nothing special about automotive speakers when compared to home speakers made from the same materials.
Answered by: MattP
Date published: 2015-12-29

Being the woofer has a high QTS of 0.95, can these be used in a free-air set up with good results?

Asked by: Pain for Fun 1980
Yes these will work well in a free air application.
Answered by: MattP
Date published: 2015-12-28
  • 2016-02-12T06:46CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.6
  • cp_1, bvpage1
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  • loc_en_US, sid_299-609, PRD, sort_recentQuestionsFirst
  • clientName_PartsExpressInternational

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