Dayton Audio ST255-8 10" Series II Woofer

Brand:| Model: ST255-8
The new generation of Dayton Audio Heavy Duty woofers features natural sounding paper cones that are chemically treated for extra durability and long life. Great for pro sound use or as a home subwoofer.
  • Large voicecoil provides high efficiency power and low distortion
  • Made in USA
  • Natural sounding paper cone
Part # 
Weight: 12.81 lbs.  
List Price$115.99
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Your Price
Buy 4-up$75.91
Part # 295-110
Qty:  EA
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Product Details

Dayton Audio ST255-8 10" Series II Woofer

The new generation of Dayton Audio Heavy Duty woofers features natural sounding paper cones that are chemically treated for extra durability and long life. The combination of a heavy magnet structure, vented pole piece, bumped backplate, and large voice coil provides excellent power handling capability with high efficiency and very low distortion. Unique suspension system consists of a rubber surround and large flat spider for superior damping characteristics and outstanding transient response. Made in the USA.

Product Specifications
  • Nominal Diameter10"
  • Power Handling (RMS)250 Watts
  • Power Handling (max)500 Watts
  • Impedance8 ohms
  • Frequency Response35 to 3,000 Hz
  • Sensitivity91.7 dB 1W/1m
  • Voice Coil Diameter2.5"
  • Magnet Weight56 oz.
Thiele-Small Parameters
  • Resonant Frequency (Fs)41.1 Hz
  • DC Resistance (Re)6.3 ohms
  • Voice Coil Inductance (Le)1.23 mH
  • Mechanical Q (Qms)9.94
  • Electromagnetic Q (Qes)0.32
  • Total Q (Qts)0.31
  • Compliance Equivalent Volume (Vas)1.72 ft.³
  • Mechanical Compliance of Suspension (Cms)0.3 mm/N
  • BL Product (BL)16.03 Tm
  • Diaphragm Mass Inc. Airload (Mms)50.09g
  • Maximum Linear Excursion (Xmax)5.5 mm
  • Surface Area of Cone (Sd)339.8 cm²
Materials of Construction
  • Cone MaterialCoated Paper
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerKapton® / Polyimide
  • Basket / Frame MaterialSteel
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter10.08"
  • Baffle Cutout Diameter9.04"
  • Depth4.38"
  • Bolt Circle Diameter9.66"
  • # Mounting Holes8
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.42 ft.³
  • Sealed F391 Hz
  • Vented Volume1 ft.³
  • Vented F356 Hz
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
Optimum Cabinet Size *
  • Sealed Volume0.42 ft.³
  • Sealed F391 Hz
  • Vented Volume1 ft.³
  • Vented F356 Hz
  • * Enclosure volume/F3s based on BassBox "optimum" calculations-
Dayton Audio ST255-8 10" Series II Woofer
  • BrandDayton Audio
  • ModelST255-8
  • Part Number295-110
  • UPC844632000034
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (32 Reviews)
  • Weight12.81 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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Dayton Audio ST255-8 10" Series II Woofer
Dayton Audio ST255-8 10" Series II Woofer is rated 4.2812 out of 5 by 32.
Rated 5 out of 5 by from Nice sounding Woofers!I had purchased 4 of these Dayton 10" Woofers and 3 of them arrived with the same assembley defect. However Parts Express was outstanding in their customer service and replaced them very quickly. I figure it was just something that happened during part of this production run, as they are highly regarded Woofers.This is a great place to do business!
Date published: 2014-02-01
Rated 4 out of 5 by from Very good replacement woofer for EV Interface C (s4)Used as a replacement woofer in my 1983 Electro Voice Interface C (series 4) speakers. I am pleased with the speaker performance. The EVs now sound great. The only downside is the external speaker surface coating is a bit sticky.
Date published: 2013-09-04
Rated 5 out of 5 by from Superb sound -- better than original woofersThese went into an old Lafayette 3002 Criterion (made by ESS) speaker system -- a two-way with a Heil tweeter and a 2,000 hertz crossover. These are heavy, obviously well made woofers. The original woofers rotted out and were replaced about 14 years ago. Although the sound wasn't bad then, I suspected that it would be better with replacement woofers, and I was right. With the new Dayton woofers the sound is superb. The bass goes down strong to 35 hz. and is audible well below that. But the beautiful thing about the new system is the mid-range, which sounds just right, with great transient response. I judge speak systems largely by how well they reproduce piano sound, and with good source material, the piano sounds like a piano. In short, I am very happy with these woofers.
Date published: 2014-03-08
Rated 5 out of 5 by from Often overlooked subwooferI bought this speaker about 5 years ago to replace a blown Carver sub and it still sounds great. This is a very music friendly sub If you are a bass guitar fan then this sub will please. It doesn't thump so it's probably not the best for rap or hip hop unless you have some form of bass boost. It does replicate explosions quite well and has no problem shaking the walls with a 200 watt rms amp. It has a flat range that is very usable through 250hz which makes it ideal if you are planning on pairing it with little main speakers that don't have much output below 200hz.
Date published: 2013-11-20
Rated 5 out of 5 by from replacement midrangeI had a couple of Kenwood speakers that i purchased about 21-22 years ago when i was in the Air Force and stationed in Korea. One of my speaker's midrange went out about two years ago and I mistakingly replaced it with a PA (public address midrange) Well, the other midrange on my kenwood speakers went out and i called technical support. The Tech Support staff got me the right Midrange and I'm very happy with my purchase. I'm ready to keep my Kenwood speakers for another 20 years!
Date published: 2012-12-10
Rated 5 out of 5 by from Daton ST255-8 As An EV Replacement!I received a couple of EV Interface CII's boxes that had the woofers missing. After a long look for replacement woofers I found these. They are an actuall improvement to the original woofers!. Near matched for SPL, better FS than original, perfect VAS match and much more! The low end is so good I do not need the EV EQ to boost the low end now! These woofers sound very good and is a great replacement for the original woofers!DC Audio Labs
Date published: 2013-11-20

Product Q&A

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If your question requires design or troubleshooting information,
please email tech@parts-expresss.com  for a prompt reply.
Dayton Audio ST255-8 10" Series II Woofer

Port Length/size for Dual woofer setup in a 2.7 cu ft box

I am looking at using these as replacments in a vintage dual 10" woofer speaker with a internal volume of 2.7 cu ft.What would be the ideal port length and size for this set up? I would like to get by with one port (stock is 2.5"D x 2.5"L) but I'm thinking 2 would be ideal.Thank you in advance.
Asked by: Mojo
There are several different ways you can do this. You can go with 1 5" port 4.68" long or 1 6" port 7.62" long.You can also go with 2 2.5"ports 2.34" long or 2 3" ports 3.81" long.In both cases the larger, longer ports will give you less noise or "huff". All 4 configurations will tune to ~48hz with an f3 of ~46hz. The drop off below tuning is pretty sharp so it might be a good idea to put some protection on them below 40hz or so. Should sound great
Answered by: Musgofasa
Date published: 2012-03-26

I have read that this is used in the Wicked One by Decaware. Does anyone know the internal volume of the sealed chambers in the Wicked One??

What is the f3 of the Wicked One using these drivers??Can this sealed volume be changed to a vented enclosure by installing a vent in the horn opening at the rear of the sealed enclosure??I would like to try them as a subwoofer cabinet (Wicked One) in a bass guitar rig.
Asked by: WTett
The WO as designed has an f3 of appr. 40hz with these drivers. The sealed chambers are between .8 and 1 cu ft depending on the baffle and how you mount the drivers. I have built about 75 of these myself and worked with a gentleman in Canada who tested at least another 100 configurations and can tell you that porting is a very bad idea. The horn loading side is very short and any disruption will be very detrimental to sound quality.It will work great for your application as is and will provide plenty of output. If you are less interested in total spl and more in musicality build the WO32 design. F3 is 32hz and output is smoother. Any questions you may have feel free to contact me or Bob from the Decware site. I doubt anyone short of possibly Don has more experience with these.
Answered by: Musgofasa
Date published: 2012-07-14

Why no frequency response/impedance graphs?

I see you have replaced that pertinent information with user reviews. Reviews are fine but not at the expense of needed specs. Don't tell me that the manufacturer didn't supply them. I get some of this from other sites for the same brands you sell.
Asked by: neobop
The specification sheet for this speaker is located along the right-hand side of the page, under the "Manuals/Resources" heading. I've included a direct link for your convenience:http://www.parts-express.com/pdf/295-110s.pdf
Answered by: RussR
Date published: 2013-03-02

what size port should i use in my cabinet 48''h x 12''w x 18'' deep #outside dimentions made from 3/4 mdf#.

I want to use two 10 inch woofers in each cabinet (not sure which crossover to use but I like the dayton silk dome 1 1/8 inch tweeters. what port size can i use I WANT SUPER AUTHORITUVE BASS. THANKS
Asked by: VITOB
This enclosure is about twice the size it needs to be for these woofers, but two 4" diameter ports that are 5" long will tune this to 37 Hz. I would recommend heavy fill in the enclosure.
Answered by: MattP
Date published: 2013-04-12


Asked by: VITOB
Why are you stuck on this enclosure size?WHat type of setup are you using these in?The more information the better.These are great woofers if your looking for high output musical/realistic bass.These woofers remind be of the awesome bass Altec Valencia's have, but a notch up in the clean/transient department-but have the same "soul".If you just looking for "boom" look else where.They really work better in smaller enclosures. This is what really makes them quite unique-as it's hard to find a quality 10" woofer that works up to it's potential in a smallish enclosure, and not loose extension or output.
Answered by: Mojo
Date published: 2013-12-22

I have Sony SS U501 home theater speaker colums, 3 of which are shredded, i need replacement speakers, would these be the ticket ? would replace all 4

speaker cutout opening is 10.5 inches
Asked by: jhunter2140
Looks like you cut-out is too big.
Answered by: Mojo
Date published: 2013-11-20

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