Dayton Audio SA70 70W Subwoofer Plate Amplifier

Brand:| Model: SA70
The Dayton Audio SA70 subwoofer amplifier offers exceptional performance and value, making it perfect for your next project. It works well as a replacement amplifier or as the key component in compact custom subwoofer speaker systems.
  • Line-level and speaker-level inputs for connection to any system
  • Auto-on circuit comes on the instant the amp is needed
  • Variable 2nd order low-pass crossover from 40 Hz - 180 Hz
  • Proven performer at a low price point
Part # 
Weight: 7.5 lbs.  
List Price$99.99
Regular Price$59.60
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Part # 300-784
Qty:  EA
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Product Details

Dayton Audio SA70 70W Subwoofer Plate Amplifier

With 70 watts of clean power and a full feature set, the Dayton Audio SA70 amplifier offers exceptional performance and value. A Class-AB output stage and large power supply section give this amplifier great sound quality, and enough power to drive most compact subwoofers.

The SA70's auto-on circuit and sealed rear enclosure make the amp excellent for upgraded computer subwoofers, and also for driving individual tactile transducers. Don't let the modest price tag fool you—this is a workhorse amplifier that delivers just the right amount of power.

Specifications: • Power requirement: 100-115 VAC • Measured power output: 45 watts RMS into 8 ohms @ 0.1% THD • 70 watts RMS into 4 ohms @ 0.2% THD • Signal to noise ratio: 90 dB (A-weighted) • Dimensions: 7-1/2" W x 8-11/16" H x 3-1/2" D • Enclosure cutout: 6-5/8" W x 7-3/4" H.

Dayton Audio SA70 70W Subwoofer Plate Amplifier
  • BrandDayton Audio
  • ModelSA70
  • Part Number300-784
  • UPC844632016387
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (145 Reviews)
  • Weight7.5 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.

View similar products to the Dayton Audio SA70 70W Subwoofer Plate Amplifier
in the Subwoofer Plate Amplifiers product category.


Dayton Audio SA70 70W Subwoofer Plate Amplifier
Dayton Audio SA70 70W Subwoofer Plate Amplifier is rated 4.2 out of 5 by 145.
Rated 4 out of 5 by from pretty decent ampUsed this Amp with The ADX shaker is pretty powerful alone, I like the design of the heat sink .I have this shaker mounted under my Futon Couch, its powerful enough to shake both the left side and the right side of the couch... it is mounted in the middle. I have it connected to a 70w DNY subwoofer Amp, that I also brought from parts express. I usded an 18 Gauge speaker wire to connect to the AMPS output located on the back side of he amp.. Then I used a male RCA subwoofer cable , and connected it to the left Mono out on the amp, and connected the other end to the Y splitter female connect on the back of the recover on the sub-woofer out.. Make sure in the recover cross over setting's are set to 40 HRZ, by default mines where set to 180. , also on the recover settings increase the subwoofer output , you will feel more shaking from the shaker this way..... also by doing this you can dail down the subwoofer valume on the back of the subwoofer so you only feel the shaking and not everyone else
Date published: 2014-10-25
Rated 5 out of 5 by from ReplacementOriginal plate amplifier in my subwoofer failed and AR would not fix it even though it was still under warranty.Someone gave me one of parts book, found the SA70 and with some alterations fit my cabinet.Works and sounds great with the addition of a new 10 inch dayton DVC subwoofer.
Date published: 2014-10-11
Rated 5 out of 5 by from Perfect amp to run bass transducersI purchased this amp to run two bass transducers (Aura AST-2B-4 Pro Bass Shaker also purchased from Parts Express) wired in series. This does a great job. I installed all of these pieces into a couch that has a pull out bed in it. It all fit perfectly. I installed the amp into the back of the couch. The instructions specifically say not to do this, so I am doing this at my own risk. My only complaint is that to get the desired bass response, I have to run the amp at a higher "volume" than I would like. Of course, I could increase the subwoofer output levels from the AVR, but then I would have to reduce my sub volume. The end result is that it runs a bit hotter than I would like.
Date published: 2014-09-01
Rated 5 out of 5 by from Good Amplifier at its power levelI was quite pleased to find that the amplifier is fully enclosed in a plastic case.I was concerned that 70 watts would be insufficient for my application, and I am getting good bass in a 15x20 foot room.
Date published: 2014-08-26
Rated 3 out of 5 by from Worked Great Until It Didn'tI bought the Dayton 70Watt amp to power my Aura Bass Shakers. The effect was awesome until after 6 months it stopped working. I tried everything to revive it and no luck. The only thing I can think of is that I didn't plug it into a power strip and I left it on auto all the time. I talked to Parts Express and they said they would replace it. I think I'm going to get a power strip and turn it off when it's not in use and see if I can get it to last longer.
Date published: 2014-07-17
Rated 5 out of 5 by from Economical Replacement for Blown TSS-450 amp.I purchased an Infinity TSS-450 surround system at a bargain price only to find the amp on the subwoofer was blown. After determining the main board was scorched and beyond repair I decided to try a Dayton Plate Amp. I took a chance on the 70 amp versus the 100 amp version based on some of the reviews and it was a wise choice. I left the original amps plastic "tub" in place and clipped off the original speaker wires to extend the too short Dayton wires. The Dayton Plate amp just fit into the tub of the original amp and by slightly angling the side screws I was able to secure all but the bottom two screws leaving about a 1 inch gap which I figure will aid cooling. The amp is still sealed from the rest of the speaker and the original geometry of the speaker is maintained. After hooking it up to the SUB output on my receiver I turned it on and was amazed that I only had to open the gain less than 20% to get all the bass I needed to fill the lower end of my system. I am very satisfied with this little amp.
Date published: 2014-07-15

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 SA70 70W Subwoofer Plate Amplifier

Im curious why this amp has left and right channel rca low level inputs when there is only one set of leads to the subwoofer. How can it separate right and left channel information to a dvc sub or two subs with one set of input leads

Asked by: banzai63
This amplifier combines left and right signals for the output to the subwoofer. If you are using a DVC woofer, you will have to wire the coils together in series or parallel as long as the load does not drop below 4 ohms.
Answered by: MattP
Date published: 2014-10-27

Is ther a parts express project box that will fit this amp?

Asked by: BOBTEK126
I am sorry, we do not currently have a box that will cover our subwoofer amps. It is a good suggestion though so I will pass it along to our new products guys.
Answered by: Chrisf
Date published: 2014-10-03

I bought two of these amps to power stereo PUCK  bass transducers for my racing simulator project. Two questions actually. Do the line level and speaker inputs function at the same time? Also, does the speaker level pass-through affect impedance? Thanks!

Asked by: Tony N
I'm not sure why it made me anonymous, but it wasn't intentional. My name is Tony. Any help is appreciated! 
Answered by: Tony N
Date published: 2014-09-26

What do you recommend for 240V installations in about the performance range of the SA70?

Asked by: Bodgie
The closest option would be the Yung SD100 which has a switchable input voltage.http://www.parts-express.com/yung-sd100-100w-class-d-subwoofer-plate-amplifier-module-no-boost--301-500
Answered by: MattP
Date published: 2014-09-24

i just recently purchased this amp to power 1 aura bass shaker. i have the gain half way. it runs amazing. but after 30 mins of use, the plate was hot. is this normal? and how long can i run this amp if i play a continuous 75Hz test tone

Asked by: hannibal
These amplifiers will get quite warm or hot if they are fed continuous sign waves.
Answered by: MattP
Date published: 2014-09-02

I have this exact amp. It suddenly stopped working. Is it possible to purchase replacement parts (circuit boards, capacitors, etc.)??

Asked by: Kamau5
Unfortunately we do not offer replacement parts for these and they are not practical to repair. If the unit is within the 1 year warranty please contact tech support so we can see about getting it exchanged.
Answered by: MattP
Date published: 2014-05-28

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