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
    (149 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 4.2215 out of 5 by 149.
Rated 5 out of 5 by from subwoofer amplifier plateSo good that I plan to buy others in the near. Future
Date published: 2014-12-23
Rated 5 out of 5 by from great ampgreat amp for the $$$$.. cut your hole for the amp, install it, & start playing. That easy
Date published: 2014-12-13
Rated 5 out of 5 by from Works greatPuts out good bass using with a 10" sub with dual voice coils in a t-line box well worth the money just concerned about how hot its is getting will contact tech support.I might have voice coils wired wrong
Date published: 2014-11-10
Rated 5 out of 5 by from Nice little ampI'm using this amp to power an aura pro bass shaker. It does the job pretty well for 1 shaker.
Date published: 2014-10-30
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

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

The volume pot went out on mine, Is there a replacement part I can order from you?

Asked by:
Unfortunately we do not offer replacement parts for these amplifiers. You might want to contact our Dayton amplifier repair tech Eric, he may be able to source something for you. 800-338-0531 and ask for Eric.
Answered by: MattP
Date published: 2014-12-24

Hi, I currently have a KLM 200 watt sub woofer that this plate will replace. It only has one wire to connect to. Which on of the wires on the back of the new plate do I use? Also, can I run a passive woofer off this plate in addition?

Asked by: Shades
For a mono single RCA connection use the Right or the RED input.
Answered by: TomI
Date published: 2014-12-16

I'm using it to power a Tang Band 6.5" rated at 4 ohms but it gets very hot very fast at half of the gain, the main Amp is a Lepai 2020+, any Ideas? Is it defective?. I know that heat kill the amps.

Asked by: RDLR
This requires a bit more information in order to proceed. Please contact our tech support for more help with this question, tech@parts-express.com or 800-338-0531 x1.
Answered by: MattP
Date published: 2014-12-16

The specs say "45 watts RMS into 8 ohms • 70 watts RMS into 4 ohms". How do you tell this amp which ohms you want to use, or does it switch automatically between 8 and 4 based on the speaker you have hooked up?

Asked by: Jammer134
The speaker that is hooked up provides the load to the amplifier. If you want the full 70 watts you will have to use a 4 ohm speaker, if you have an 8 ohm it will only produce about 45 watts.
Answered by: MattP
Date published: 2014-12-08

I have a Pioneer VSX-823 receiver which has a Preout Subwoofer port. I want to connect it to my old passive Polkaudio RM1000W subwoofer which only has hardwired LR channel connections. How can I connect the Preout Subwoofer cable to this amp?

Asked by: Will49
The preout on the receiver will be plugged into the right line level input on this amp. The subwoofer will connect to the red and black wire on the back of the amp. If each input on the subwoofer is 8 ohms, they can be wired together in parallel for a 4 ohm load.
Answered by: MattP
Date published: 2014-11-12

I have a passive subwoofer (8 ohm, 10-100 watts) and two speakers (6 ohm, 50 watts) powered by a 2 channel 90 watt amplifier. From my audio understanding, this is missing major power. How would I connect all those to a plate amplifier or another option?

Asked by: beatles1
You will have to use the speaker level inputs and outputs on the subwoofer amp in order to get it wired properly. The speaker outputs on the stereo amp you have now will be wired to the "From Amplifier" terminals on the subwoofer amp, and the satellite speakers will be wired to the "To Speakers" terminals. The subwoofer will be connected to the red and black wires on the back of the subwoofer amp.
Answered by: MattP
Date published: 2014-11-06

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