Dayton Audio RS225-8 8" Reference Woofer

Brand:|Model: RS225-8
Dayton Audio Reference Series RS225-8 8" woofers deliver exceptional clarity, detail, and dynamics—and of course, incredibly low distortion.
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List Price$74.99
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Part # 295-356
  • One of the lowest distortion, highest resolution driver series available
  • Low-distortion high-excursion motor system with two short-circuit paths
  • Compliant suspension and rigid black anodized aluminum cone for strong bass performance
  • Heavy-duty 6-hole cast frame, low-loss rubber surround, and solid aluminum phase plug
  • Designed and engineered in the USA

Product Details

Dayton Audio RS225-8 8" Reference Woofer

The Dayton Audio Reference Series was conceived with one goal in mind—low distortion. Each speaker was carefully designed and optimized to offer the highest performance with the lowest distortion levels. At the same time, by focusing on features that contribute to sound quality and eliminating unnecessary frills, the drivers offer value unparalleled in the industry. Dayton Audio Reference Series RS225-8 8" woofers deliver exceptional clarity, detail, and dynamics—and of course, incredibly low distortion.

Product Specifications
  • Nominal Diameter8"
  • Power Handling (RMS)80 Watts
  • Power Handling (max)160 Watts
  • Impedance8 ohms
  • Frequency Response28 to 2,400 Hz
  • Sensitivity86.8 dB 2.83V/1m
  • Voice Coil Diameter1.5"
Thiele-Small Parameters
  • Resonant Frequency (Fs)28.3 Hz
  • DC Resistance (Re)6.5 ohms
  • Voice Coil Inductance (Le)0.86 mH
  • Mechanical Q (Qms)1.46
  • Electromagnetic Q (Qes)0.51
  • Total Q (Qts)0.38
  • Compliance Equivalent Volume (Vas)2 ft.³
  • Mechanical Compliance of Suspension (Cms)0.88 mm/N
  • BL Product (BL)9.05 Tm
  • Diaphragm Mass Inc. Airload (Mms)35.8g
  • Maximum Linear Excursion (Xmax)7 mm
  • Surface Area of Cone (Sd)213.8 cm²
Materials of Construction
  • Cone MaterialAluminum
  • Surround MaterialRubber
  • Voice Coil Wire MaterialCopper
  • Voice Coil FormerAluminum
  • Basket / Frame MaterialCast Aluminum
  • Magnet MaterialFerrite
Mounting Information
  • Overall Outside Diameter8.78"
  • Baffle Cutout Diameter7.24"
  • Depth3.5"
  • Bolt Circle Diameter8.23"
  • # Mounting Holes6
Optimum Cabinet Size (determined using BassBox 6 Pro High Fidelity suggestion)
  • Sealed Volume0.45 ft.³
  • Sealed F363 Hz
  • Vented Volume1.26 ft.³
  • Vented F336 Hz
Dayton Audio RS225-8 8" Reference Woofer
  • BrandDayton Audio
  • ModelRS225-8
  • Part Number295-356
  • UPC844632088766
  • Product CategoryWoofers
  • Unit of MeasureEA
  • Product Rating
    (16 Reviews)
  • Weight6.1 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 RS225-8 8" Reference Woofer
Dayton Audio RS225-8 8" Reference Woofer is rated 4.875 out of 5 by 16.
Rated 5 out of 5 by from Great upgradeUsed to mod some old Signet SL280s into dual subwoofers for my home theater. Does need some subsonic filtering to avoid over excursion, but really is a major improvement original woofer.
Date published: 2015-08-30
Rated 5 out of 5 by from good parts/good servcieI am very happy with my recent purchase and the sales help that I received.
Date published: 2014-10-06
Rated 4 out of 5 by from Modus operandi is key with this driver !As the title suggests, the specific application of this driver will dictate it's performance and ultimately your perception of it. With that being said, I purchased six of these drivers (two of the 8Ohm model and 4 of the 4Ohm model). Eventually these will be used in my tower project, which will include three per cabinet (One 8Ohm & two 4Ohm), as they will be powered by separate amplifiers. When my project is finished I plan on listing it under the projects section of the site and I will be updating my review to cover the new build. However, I wanted to give a quick review on my first impressions and experience with the driver for others who might be on the fence which is as follows:Testing Equipment: Denon In-command series receiver rated @145wpc-rms, and Dahlquist speaker cabinets ( see attached picture ).Appearance & Build: Very goodSound Quality: Above average (expect to spend much more to beat them)Power handling:Home Theater - Not very good under 40hz, "I did bottom these out a couple of times( at less than 1/4 volume ) watching Terminator Salvation, which has some very demanding subsonic scenes." After running them with a 40hz crossover-point they did not bottom out, but there was a substantial gap in the bottom end, so I would definitely recommend a dedicated sub for HT.Music - Actually not that bad, however most of the tracks I tested rarely reached lower than 40hz. With that being said, they sound very clear and the bass is tight at moderate volume levels, but as the gain goes up the performance goes down. If you want punchy in your chest bass ( which is one of my goals! ) you should consider multiples, as I did. I believe when I get all six of these installed in the proper air space they are going to sound very big.Overall: I am happy with my purchase and I do not regret my decision to go with these drivers. With that in mind, I am on a budget which is one of the main reasons I chose this driver. Price aside, they perform very nicely when applied correctly!
Date published: 2014-09-21
Rated 5 out of 5 by from Good woofer at a great priceThis woofer sports many features found in much more expensive designs. Smooth sound allow it to be used in nice 2-3ways with a low crossover point (below 2.5K) as well as nice extension in mid size cabinets. If ultra low brain bashing bass isn't required, it is even flexible enough to be used to great effect in compact sealed designs that cover all but the very lowest notes with finesse and resolution. Would make a killer centerpiece in a near state of the art monitor (costing under 5K per pair) or compact floor standing system that hold its own using even just one woofer. I am running 2 per side ( -: The Cabinet volume in just over 2 cubic feet tuned to about 35Hz producing a somewhat plump but still fast response. Good bass extension to the low to mid 40's, which is hard to do with decent output in cabinets under 1 cubic foot and still manage to get a nice clean lower midrange response too. 2 of them would be awesome in just over 3 cubic feet! To get the most out of this driver, use the highest quality box and crossover parts you can afford. To do better you better call the bank, because it will cost at least 3-5 times as much for the same (or worse) performance from many other manufacturers.
Date published: 2014-07-21
Rated 5 out of 5 by from Hard to believe.This woofer is used in my Finalist speaker build. I'm not a professional but the first thing I noticed when I played the speakers was the bass I had never heard such tight bass coming out of a ported enclosure. Real nice sound! The enclosure is around 38 liters with a 2 1/2" (part #260-386) port 7.75" long with an F3 around 32hz.
Date published: 2013-09-29
Rated 5 out of 5 by from Pleasantly surprised...I bought this to replace a blown speaker in an old set of klipsch passive radiators. It sounds so much better than the other speaker that I intend to buy another to replace the other. Cant beat the performance for the price...
Date published: 2013-09-01
  • 2015-11-26T06:39CST
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Product Q&A

Get your questions answered from other customers
who own this product or have experience with it.
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Dayton Audio RS225-8 8" Reference Woofer

What size port does this require for the recommended box volume?

Asked by: tluoma
I would recommend a port that is 2.5" diameter and 8.5" long for a tuning frequency of 32 Hz.
Answered by: MattP
Date published: 2015-09-24

I need to crossover this woofer at 2000 Hz what size coil should i use?

Asked by: tluoma
A 2.5 mH coil will cross this woofer at 2,000 Hz.
Answered by: MattP
Date published: 2015-09-24

how will these perform in the doors of a car? temporarily going to be playing just about everything 300hz and down until  i get a subwoofer. will recieve about 160 rms. i do plan on deadening the door as well 

Asked by: tyler99
These are a popular choice for a car application. Headroom is good but bear in mind these will not thermally handle 160 watts.
Answered by: MattP
Date published: 2015-08-05

Thoughts on using these as replacements for a Dayton 8 tower? I have loved these for a while but could use a bit of freshening up.  

Asked by: HTRD
These will probably work reasonably well in the enclosure volumes but the crossovers would need to be completely redesigned.
Answered by: MattP
Date published: 2015-05-19

How thick is the mounting plate and the cut out diameter and the overall diamiter of the mounting plate I want to do a recessed speaker I also need these specs for the Dayton RS28F

Asked by: Cayd
This information is available in the spec sheets for these
Answered by: MattP
Date published: 2015-02-27

How close are measured specs on pair of drivers especially Fs and Qts ? THX

Asked by: ugottabekidding
Measured specs from a pair of the same drivers will be well within 5% of each other.
Answered by: MattP
Date published: 2015-02-25
  • 2015-11-26T07:18CST
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