Dayton Audio SA25 25W Subwoofer Plate Amplifier

Brand:| Model: SA25
This ultra-compact 25-watt subwoofer amplifier offers the perfect amount of power for any small subwoofer system. It delivers a real 25 watts RMS of power.
  • Line-level and speaker-level inputs for connection to any system
  • Variable 2nd order low-pass crossover from 60 Hz - 180 Hz
  • Speaker relay prevents turn-off thumps
Part # 
Weight: 2.5 lbs.  
List Price$59.99
You Save40%
Your Price
Part # 300-782
Qty:  EA
Available Payment Methods

Product Details

Dayton Audio SA25 25W Subwoofer Plate Amplifier

This ultra-compact 25-watt subwoofer amplifier offers the perfect amount of power for any small subwoofer system. It delivers a real 25 watts RMS of power, which is not an exaggerated figure like found in most typical multimedia systems. With a solid 25 watts, it has enough oomph to reach 100 dB with many drivers. Measuring only 6-1/4" square, the 25-watt amp will fit in even the smallest enclosures.

Specifications: • Measured power output: 15 watts RMS into 8 ohms @ 0.1% THD, 25 watts RMS into 4 ohms @ 0.2% THD • Signal to noise ratio: 90 dB (A-weighted) • Power requirement: 120 VAC • Dimensions: 6-1/4" W x 6-1/4" H x 2-1/2" D • Enclosure cutout: 5-1/4" W x 5-1/4" H.

Dayton Audio SA25 25W Subwoofer Plate Amplifier
  • BrandDayton Audio
  • ModelSA25
  • Part Number300-782
  • UPC844632016370
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (77 Reviews)
  • Weight2.5 lbs.
  • Case Qty12
  • 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 Dayton Audio SA25 25W Subwoofer Plate Amplifier
in the Subwoofer Plate Amplifiers product category.


Dayton Audio SA25 25W Subwoofer Plate Amplifier
Dayton Audio SA25 25W Subwoofer Plate Amplifier is rated 4.3766 out of 5 by 77.
Rated 5 out of 5 by from exceeds all expectationI bought this amp to power a passive nakamichi sub, that I have has for quite some time, to use in a 12 x 14 bedroom. I was leaning towards the next larger 70 watt amp, but thought it would be over kill for such a small space, so decided to give this little guy a try first. It performed so well in the bedroom, that I decided to see how it performed in my 2 1/2 car garage with a 14 foot ceiling and all I can say is "wow". Although, as others have stated, this is not a window rattling amp, this amp puts out a heck of a lot of sound for 25 watts of power. The crossover offers a wide frequency range, which allows it to blend well with almost any speakers. If you have realistic expectations from 25 watts, you will be please with the performance. It would be a bargain at twice the price
Date published: 2015-01-04
Rated 5 out of 5 by from Great Little AmpIt is actually driving a 12 in Cerwin Vega home subwoofer and sounds great,someone said it wouldn't shake walls but it knocked my smoke detector off my hall ceiling,good enough for me.
Date published: 2014-12-31
Rated 5 out of 5 by from A lot for your moneyThis little amp is driving two 8in cerwin Vega speakers and it sounds great,just ordered another one for a Big replacement amp,I don't have any doubt it will drive it fine.
Date published: 2014-12-19
Rated 5 out of 5 by from Solved my problemBought a house with speakers built in, bought a great receiver to get things going...then found out the receiver needed a powered subwoofer to get the bass going. This ended up being the answer to converting the passive subwoofer into a powered one, without having to change either of the components. I am very inexperienced with all of this, but with the help of technical support, I was able to hook this up myself. And now I have bass!
Date published: 2014-10-28
Rated 5 out of 5 by from Fits KLH BassBite VOrdered it based on the dimensions. The old plate was 40 Watts but it sounds great for a small apartment...better then throwing a perfectly good speaker and enclosure. The old amp made a loud humm when it was hooked up to nothing. Very pleased with the purchase.
Date published: 2014-10-20
Rated 5 out of 5 by from Easy Clean InstallationThe part arrived in an acceptable time period in good packaging to protect it. It looks professional mounted in my subwoofer.With this reasonably priced part I turned an inexpensive subwoofer into a much nicer one. It isn't crazy powerful, but it does the job. If you're looking for something to rattle your windows, this is not what you're looking for. If you want to feel the base at just the right times during a movie, this plate will help your sub do what it was meant to do. If you want your install to look professional, find some #6 or #8 3/8" black painted screws. Sheet metal or wood screws will do. You could paint non-black screws. You'll want 8 of them.
Date published: 2014-07-29

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.
Dayton Audio SA25 25W Subwoofer Plate Amplifier

Will this amp work with 4 4" 2ohm tang bands (W4-992C) wired in series (making 4ohm load), and a tang band 5 1/4" sub (W5-1138SMF)? The 4"s would be paired for left and right sides. Also, is that 25 watts to each pair of 4", and 50 watts to the 5 1/4 sub?

Asked by: shinkl
This amplifier only has one mono powered output. It will work with two of the 2 ohm Tang Bands wired in series, or one of the 5-1/4" subs. It produces 25 watts RMS into one channel at 4 ohms.
Answered by: MattP
Date published: 2014-12-17

How many channels does this amp have?

Asked by: shinkl
The subwoofer amp can take L+R input to a single ( one channel) output.
Answered by: TomI
Date published: 2014-12-16

will this unit turn on with an input signal only?

Asked by: build 35
No, this does not have auto sensing power-up. It can only be turned on using the volume knob.
Answered by: MattP
Date published: 2014-12-05

Does this have an on off switch?

Asked by: madmuh
The amplifier is turned on/off by the volume knob (it has a "click" detent at the bottom end of the scale that turns the amplifier power off).
Answered by: DaytonAudio_Rory
Date published: 2014-12-01

When using the speaker level input will the main speakers still run full range or will the lows be cut off?

Asked by: madmuh
The SA25 does not have high-pass filtering on the speaker level outputs (simple pass-thru only). The speaker outputs will pass the same full-range signal received by the speaker level inputs.
Answered by: DaytonAudio_Rory
Date published: 2014-12-01

I have two old 12" Rockford fosgates in an old car enclosure will this be able to power them?

Asked by: andrsn771
It will power them, but whether it will be enough is debatable. Assuming both woofers wired together are 4 ohm, this will have very limited output capability. You might be farther ahead with the SA100 or SPA250 models, as long as the load isn't lower than 4 ohms.
Answered by: MattP
Date published: 2014-11-25

Customer Projects

Customer projects that include: Dayton Audio SA25 25W Subwoofer Plate Amplifier

If you built a project using this product, post it in the Parts Express Project Gallery.

Customer Discussions

If you would like to start a discussion about this product, post a thread in the TechTalk Customer Forum.
Get Deals
emailed to you every week.

Be the first to hear about new and exciting products,special pricing and incredible deals!

See This Week's "GET DEALS" Email
Parts Express
725 Pleasant Valley Dr.Springboro,OH 45066USA

© 1996-2015 Parts Express, All Rights Reserved

Live Chat Software