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Focal 25A4

Access Series 10" 4-ohm subwoofer

Item # 09125A4

Perfect sound. Discreet style.

Perfect sound. Discreet style.

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Item # 09125A4

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$179.99 each

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About the Focal 25A4

Dream speakers

Perfect sound. Discreet style. Premium construction. These are the standards that define Focal – and that make listening to Focal speakers an absolute pleasure. The Access line offers a marriage of performance and affordability, allowing you to experience the best in sound with a guilt-free conscience.

Dream speakers

Perfect sound. Discreet style. Premium construction. These are the standards that define Focal – and that make listening to Focal speakers an absolute pleasure. The Access line offers a marriage of performance and affordability, allowing you to experience the best in sound with a guilt-free conscience.

Feel the bass

Bass gives your music fullness and texture. If you shortchange the bass, you're not hearing your music the way it's meant to be heard. This Focal Access Series 25A4 subwoofer uses an all-weather DFS (dual fiberglass structure) cone to deliver that depth of character you may be missing from your system. The cone's butyl rubber surround helps to ensure excellent strength, durability, and musical accuracy.

A unique ventilation system keeps the voice coil cool, allowing this sub to handle up to 200 watts RMS. Install this sub in a sealed box for tight, punchy bass, or in a ported enclosure for a little more boom.

Focal 25A4

To drive this single subwoofer, we recommend a mono amplifier rated between 150 and 300 watts RMS at 4 ohms. For more information, please refer to our article on How to Match Subwoofers and Amplifiers.



  • 10" 4-ohm subwoofer
  • dual fiberglass structure cone with butyl rubber surround
  • 4-3/4" magnet promotes serious power handling
  • spider decompression ventilated coil
  • high SPL
  • power range: 50-200 watts RMS (400 watts peak)
  • frequency response: 36-500 Hz
  • top-mount depth: 5"
  • sealed box volume: 0.52-0.88 cubic feet
  • ported box volume: 0.71-1.23 cubic feet
  • sensitivity: 85.4 dB at 2.83 volts
  • grille not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # 25A4

What's in the box:

  • One 10" Single voice coil woofer
  • Removable rubber mounting ring (installed)
  • Eight 7/8" Self-tapping screws
  • User manual (English/ French/ Russian)
  • Focal window sticker

Customer reviews

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Focal 25A4 reviews

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6 reviews

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Focal 25A4

Crutchfield customer from Petersburg, IL on 4/3/2018

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Very good bass response but not overwhelming. The sub looks great. Very nice quality. My only wish is that I went with two instead of one.

Pros: Looks great cosmetically Sounds good with all music

Cons: Struggles just a hair with very low tones

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0 of 0 found this helpful

Inexpensive yet awesome!

Ed from GU on 2/14/2017

2015 Mitsubishi Outlander Sport

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Before anything, I'd like to disclose I like listening to music in moderate to moderately high volumes. I have one Focal 25A4 in a custom fit sealed enclosure (.71 cft) in the trunk of my 2015 Outlander Sport. I have a Rockford Fosgate R600x5 powering up my sub, JL Audio TR650-CXi on rear, and JL Audio TR650-CSi on the front. I like my system well-rounded -- nothing overpowering the other components. I tuned my sub by using an oscilloscope. Crossover point on the front and rear is at 100hz and 110hz for the bass. I kept my factory stereo, so I used the speaker level inputs. This sub sounds great along with the rest of the setup! Before the sub shipped, I received the speakers first. I installed the speakers and loved the improvement over the stocks. I thought that was good enough until I installed the bass. Wow! The sound stage expanded and sounded amazing. The sub adds a tight bass that I look for. I listen to rock, metal, electronica, hard dance and D&B. My car is an open cab to the trunk -- it helps the bass pass to the front more. Not sure if it lessens for sedans. This sub can handle louder volumes, as long as you tune it right. The recommended max RMS is only at 200W. It will not turn heads on the road, if that's what you're into. It will also not produce sounds 35hz and below. This sub is meant for those who wants to expand the sound stage of their car audio system. If you're going to use a sealed enclosure on this, check for major air leaks.

Pros: Adds a low soundstage. Inexpensive. Low power consumption.

Cons: Does not hit below 36hz. May not be loud enough for some.

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11 of 12 found this helpful

Great sub

Jair from El Paso,TX on 7/4/2016

2014 Ford F-150 XL

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Amazing sub, tight and accurate blends in nicely with the front comps (focal 165vb). It's installed in a sealed 0.70 enclosure hooked to a Zed Draconia III. I wanted great sq and that's exactly what I got. If you want a loud sub look somewhere else. If you want great sq and listen to your music at normal volume levels this sub is hard to beat; don't get me wrong it can get loud but you won't wake up the neighbours.

Pros: Great sq, very musical sub


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3 of 3 found this helpful

Focal Focused on Superior Sound

William M from Central PA on 3/20/2016

2015 Subaru WRX

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I have the Focal Access 10" subwoofer in a sealed enclosure that's about .55ft^3. The enclosure is on the small side so it's stuffed with polyfill. The subwoofer is powered by 250 watts via an Alpine PDR amp. The how small the enclosure is, the sub performs very well. There is a slight lack of very low end sounds (below 50hz), but I'm sure in a ported box tuned correctly, I wouldn't be able to notice. The bass itself is sharp, accurate, and clean. The subwoofers excursion is more than I expected from such a small driver. If you're looking for a sub that can perform in a small enclosure with around 200w RMS, then I highly recommend the Focal Access 10". It may not be the loudest sub, but it certainly is of very clean quality and provides the extra punch to match up with other good speakers in the vehicle.

Pros: Small enclosure compatible, low power handling, very tight and accurate bass, good price for an SQ sub

Cons: Smaller sealed enclosure seems to lack a bit of low end extension,

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1 of 1 found this helpful

Good Sub No Low End Bass

Nivek111070 from Fort Worth on 2/5/2015

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Clean sound, higher end on the mid bass is lacking and low end is missing completely. With that being said it is in a sealed box with .80 cubic feet. Might perform better in a ported box. All in all a good sub for the money.

Pros: Clean natural sound

Cons: no low end bass

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2 of 3 found this helpful


Crutchfield customer from AZ on 9/20/2014

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I have not even had the chance to tune the 2 subs I just purchased and I am blown away so far. These are hooked up to 500 w Alpine mono, 3/4 up and very satisfied with the subltle frequency response they provide. You get what you pay for and these provide a high end product at a very tolerable price range. I highly recommend if you listen to a variety of music and have an appreciation for the details in the mix of your favorite records / artists. I only gave 4 stars on build quaility because I just installed and have not broken them in.

Pros: Frequency response, clean, basic power needed.

Cons: Nothing as of yet.

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1 of 1 found this helpful

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Product Research


Cone Material: The Dual Fiberglass Structure Membrane (DFS) is a light, rigid, woven glass fiber woofer cone. The butyl rubber surround is resistant to ultraviolet rays, temperature extremes, and humidity to add to the speaker's reliability and longevity.

Spring-Posts: The 25A4 uses spring-post speaker terminals for easy connection of single banana plugs, pin connectors, or bare wire up to 10 gauge.

Rubber Gasket: The gasket/mounting-ring ensures better chassis damping and prevents air leakage. The rubber gasket is removable.

Sealed Box Volume: FOCAL recommends a sealed enclosure with a volume between 15 liters (0.53 cubic feet) and 25 liters (0.88 cubic feet).

Ported Box Volume: FOCAL recommends a ported enclosure with a volume between 20 liters (0.71 cubic feet) and 35 liters (1.24 cubic feet) using a single 3-1/2" diameter 13-3/4" long port tube.

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Customer Q&A

Crutchfield asked: Why did you buy this?
I love the clean, vivid sound of Focal components and wanted a cleaner low end to replace the 15" P3 Rockford sub which worked great on an EQ. Aaron had good advice. Thanks. [ chris  Jul 11, 2018 ]
Sound Quality [ JONATHAN  Jul 04, 2018 ]
Great frequency response, great RMS values, very clean look, and the Focal name! [ Justin  Dec 17, 2015 ]

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