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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
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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
    (137 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 4.1898 out of 5 by 137.
Rated 4 out of 5 by from like they say more suited for compact systemI'm using this sa 70 to power a pro series 200 watt rms 4 ohm 12 '' sub (radio shack) in a home built ported box . the sound is very good but the amp is lacking in power for this size speaker . It would be great for lower power speakers as stated in the description / i used the 12'' because it was there in the box for years unused on the shelf . For this speaker a 200 /300 watt amp would be great / but it sounds good so i'l stick with it !
Date published: 2014-04-01
Rated 5 out of 5 by from SA 70 Power Amp PlateI bought this amp plate to make my passive subwoofer into a non-passive.It works Great and the customer service I received on this project was also Great!
Date published: 2014-03-20
Rated 4 out of 5 by from good for the moneygood for the money replaced amp in a khl sub woofernot a lot of power but good on movies
Date published: 2014-03-17
Rated 5 out of 5 by from Good product.I'm using this amp for a racing arcade to power a transducer. It does what it says it would and I'm very happy with it.
Date published: 2014-03-12
Rated 4 out of 5 by from It's a keeper!I bought this a month ago for my old garage Sanyo 10 watt stereo with built in EQ hooked up to an old pair of Community 15 inch 2 way PA speakers. The system needed some bottom support. As another reviewer commented the sound to the woofer allowed too much of the lower mids. So, I put a 2.5 mh inductor in series with the woofer, that fixed it. As it turns out, I stuffed a towel to plug the Sub port as I am not interested in rattling things, I just want the 20 – 40 hertz to be present in my music. My sub is a 10 inch home unit I got from my son for Christmas that didn’t have an amp. The Dayton 70 watt turned out to be quite the overkill for my application. I run it at the 40 Hz setting and the power level at 2. I’m completely satisfied.Thank you Dayton and Parts Express.
Date published: 2014-04-01
Rated 4 out of 5 by from Perfect Match !!!!I bought this recently to power a 2-12 " 4 ohm subwoofer that had originally been used in a car stereo set up. My son is into vinyl. We put together a Harmon Kardon receiver with some Yamaha surround speakers speakers, and used the sub for the low end. The 75 watts output is perfect for his tiny room, and drives the speakers quite well.I am probably going to buy another one to replace the amp in my old M an K sub.
Date published: 2014-01-22

Product Q&A

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Dayton Audio SA70 70W Subwoofer Plate Amplifier

Can I hook up two 4 ohm subwoofers to this amp? If so how?

Asked by: John Doe
Yes, wire them in series to get 8 ohms. You won't get quite as much power, but if you wire them in parallel you will end up with 2 ohms, which this amp can't handle.
Answered by: XLR8R
Date published: 2014-04-01

Can two SA70's be setup for two channel?

I would like to integrate two SA70 powered sub-woofers into a two channel system. If this is possible, what is the recommended wiring?
Asked by: bungelowed
Depends on how you source the signal to them, line level or speaker level, but if I understand what you are asking correctly, yes, it's very possible.Since both inputs, line level and speaker level, are stereo, and are converted to mono before feeding the subwoofer amp, you only need feed the signal into one input (right or left) to drive the amp.For example, lets say you are designing it as a subwoofer and a main speaker on each channel. You can feed the speaker output signal from your receiver or amplifier to the subwoofer amp's speaker level input, then out the subwoofer amp's speaker level output to the main speaker. Do this on both sides, and you have a subwoofer and main speaker on both sides, left and right.If you are feeding the subwoofers from a line source however, like a preout on your receiver or preamp, you will only be able to drive the subwoofers, and will need to drive the main speakers from your receiver's or amplifier's speaker output. This approach allows a bit more flexibility and less distortion into the subwoofer amps.
Answered by: Doug76
Date published: 2011-10-13

Hook up

I have a harmam kardon avr 125 amp and on the rear there is only 1 rca jack that says pre out sub woofer how will this hook into the Dayton Audio SA70 subwoofer amp?
Asked by: buckmiester55
You may connect your sub pre-out to just the right or left input on the SA70, or you may use a "Y" adapter (referenced below) with a standard RCA cable to feed both inputs. The choice is yours. Some claim to get better results by feeding both inputs, however, in my personal setup at home, I feed only one input, and the result is quite satisfactory.
Answered by: RussR
Date published: 2012-07-24

Can one plate amp drive 2 passive subwoofers?

Sorry if this is a dumb question! I have 2 wall mounted 10" subs (100W nominal). Do I need one plate amp for each sub? The picture of the connections appears to allow 2 subs to connect to a single plate amp. Appreciate the assistance!
Asked by: Jason
One plate amplifier may be able to drive your subwoofers, but it depends on how loud you would like for them to play and their nominal impedance.If your subwoofers are 8 ohms each, wire them in parallel for a single 4 ohms load to the amplifier. If your subwoofers are 4 ohms each, wire them in series to the amplifier.If you find that the subwoofers distort before your preferred volume level, two amplifiers may be needed.
Answered by: mikevv
Date published: 2011-02-27

Are the High Level / Speaker outputs full range or high-passed at the sub-woofer frequency?

Asked by: memphissound
Pretty sure they pass the full signal. My opinion based on price and available power.
Answered by: Doug76
Date published: 2012-04-16

this amp seems like the perfect awnwer to my stereo sub project because of the lower price i can order 2

but the problem is I read so many bad reviews when it comes to the crossover , my question to parts express is , has this issuebeen resolved or is it still a problem.
Asked by: spy cat
At this price point, you are not going to get sophisticated crossover components. If you have an LFE or sub out of your source unit with its own internal crossover - you should be fine.
Answered by: MarkAJH
Date published: 2013-03-06

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