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

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.
  • 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!
Part # 
Weight: 1.8 lbs.  
Regular Price$26.00
You Save81%
Sale Price
Buy 25-79 $3.99
Buy 80-up$3.20
Part # 299-609
Qty:  EA
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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
    (37 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.

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6-1/2" Poly Cone Midbass Woofer 4 Ohm
6-1/2" Poly Cone Midbass Woofer 4 Ohm is rated 4.4865 out of 5 by 37.
Rated 5 out of 5 by from Very ImpressedI bought 8 of these speakers to build left and right towers. I wanted big and these delivered. The two towers are 4 feet tall each. Each tower has four woofers and two tweeters. We used 1/4 MDF and finished with the Acry-Tech DuraTex from Parts express. They look and sound great. I get a lot of compliments on the look and sound. The sub in the pic is a PSW10 Polk to show scale. I highly recommend.
Date published: 2015-04-16
Rated 5 out of 5 by from Very good value-second pairI first heard these speakers in the Dayton 625 bookshelf speakers. PE has them at a bargain price. This is the second pair. I plan to use these in a 3 way with a piezo horn or a 1" compression horn and a Fountec 3" extended range for the mid range. This midbass woofer gives a solid punchy, clear bass. I am tempted to buy a few more for future projects.
Date published: 2015-04-10
Rated 5 out of 5 by from awsome price point and soundHey first time poster here !I build speakers as a hobby , usually PE buy outs , I use gator clips to connect different configurations while testing to get the best sound , caps, resist , air inductors etc....Try L1 .01 mh in series , then C1 parallel then a 1.0 mh in series ,as a former Marine tone deaf but I can feel it .Brought some friend over who are more adept then me to music and and sound for price point they couldn't believe the sound . Very happy will be ordering more
Date published: 2015-03-19
Rated 5 out of 5 by from Greatly exceeded my expectationsI used 12 of these drivers per side in a 8' line array for my main 2 channel home system. Along with these no-name budget drivers, I used 9 Dayton PT2C-8 planar drivers per side. I expected them to do okay but after dialing in the system I was blown away. The little 6 1/2 inch drivers are crossed from 70Hz to 2800Hz and I have a pair of 15' drivers handling the non-directional bass (20Hz to 70Hz) located elsewhere in the room. Obviously, the little drivers are handling the majority of the bass content of my music and they do it cleanly, effortlessly and with authority. As others have mentioned, there are a few peaks but they are easily delt with using an active crossover/dsp. My line array is also an OB (Open Baffle) design which causes the bass to take a hit regardless of driver. I've found it not to be an issue as I am not lacking in any way for bass content and I am admittedly a bass lover.They also relay the midrange content with a consistent timber as the bass and again, do it effortlessly. I believe this is due to the combination of being a line array.....and Open Baffle....and because many small drivers are able to perform with little effort and subsequently little distortion.The PT2C-8 Planar tweeters integrate seamlessly with the 6 1/2" drivers but of course are a bit more instantaneous. I've added a bit of delay to the tweeters with my MiniDSP to time align all the drivers. I won't list all of the speakers I've owned over the years but the list is long from entry level to mid grade to high end speakers. I've found these to be well ahead of anything I've owned so far and couldn't be more pleased.Although it's said by many that you can't take a crummy driver and make it sound good by simply adding more. I believe with an active crossover/dsp you can make any driver sound better and a decent driver sound great. Adding more like in a line array simply gains you the benefits inherent in the design such as a cylindrical wave front and less db loss over a given distance. Make it OB and you've got a figure 8 cylindrical wave front if you like a dipole design.Thes 6 1/2" drivers if properly implimented, can yield excellent results and I highly recommend them for the do it yourself people, or as a possible replacement driver.
Date published: 2015-02-04
Rated 4 out of 5 by from GoodBought 8 of these for an open baffle project, 4 low range drivers per channel. In the process of breaking them in as we speak. Have them series/parallel wired for a 4 ohm load, low cut-off is 60hz, and crossed at 200hz at the top end. That way, this handily avoids the 52hz resonant frequency, yet still provides a decent amount of bass content. So far, they are doing well. Hopefully they will open up a little as break-in progresses. Not quite the openness yet of the Visaton FR13 full ranger, but definitely more bass presence.
Date published: 2014-12-27
Rated 4 out of 5 by from nice little speakergot a couple to reload so old scottts enclosures..cant go wrong for the money..this was a sealed box design..sound just fine
Date published: 2014-12-19
  • 2015-05-29T07:02CST
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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.
6-1/2" Poly Cone Midbass Woofer 4 Ohm

Could I use these with tweeters for my new surround system. I use a separate powered pair of subwoofers,so thinking these would work with two way crossovers.

Asked by: Strader
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: GregT
Date published: 2015-05-27

Hi: I purchased four of these woofers with the goal of making two speakers running the drivers in series for 8 ohms. What is the best size of sealed cabinet for this application? Also it sounds like these will work well with a 2500Hz to 3000Hz crossover?

Asked by: flj1
You will want to use a 1.5 Ft3 box tuned to 56 Hz for two drivers wired in series. Yes, a cross over set at 2.5 to 3 KHz will work well.
Answered by: MattW
Date published: 2015-04-23

Would 2 in series make it 8 ohm/60W RMS ? 1CuFt for sealed ? If I need a pair for clean Music(mostly acoustic/classical/pop/acapella/eastern styles of music). I do NOT plan to add Subwoofer. Any tips to get good coverage on the lows ?

Asked by: anilct
Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2015-05-25

Are these woofers candidates for a compound woofer set-up? I kinda feel like 1.5 cf box is too big for a small speaker. Now 0.75 cf in a compound speaker is acceptable. Especially since they are only $5 each. Any thoughts out there?

Asked by: irubik and iclone4 guy
This should work fine in a compound isobaric setup as long as you aren't looking for huge amounts of output. A pair of these compound loaded will only require 0.5 cubic feet and have an F3 of about 54 Hz.
Answered by: MattP
Date published: 2015-01-06

building a 2way speaker set up using these woofers wired in parallel with this tweeter Part # 279-002  is this going to be okay being that the woofer is 4ohm and the tweeter is 8ohm? 

Asked by: beasten25
Yes this will work fine, the impedance different will not effect anything. Make sure you have a crossover on the tweeter for protection.
Answered by: MattP
Date published: 2014-12-31

Any point in considering these for open baffle? Fairly high Q, and efficiency. Thinking of stringing up to 4 of these for each channel -- target load being 4 ohms, band passing them around 60Hz, and high passing the full range driver at 200Hz.

Asked by: ibroke
These should work well open baffle, especially used in multiples and high passed at 60 Hz.
Answered by: MattP
Date published: 2014-12-04
  • 2015-05-29T09:42CST
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