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Dayton Audio SA70 70W Subwoofer Plate Amplifier

Brand:|Model: SA70|Part # 300-784
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.
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List Price$99.99
Regular Price$59.60
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Part # 300-784
  • 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

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: 120 VAC, 60 Hz, 110W • 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
    (156 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.

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Dayton Audio SA70 70W Subwoofer Plate Amplifier
Dayton Audio SA70 70W Subwoofer Plate Amplifier is rated 4.25 out of 5 by 156.
Rated 4 out of 5 by from hole in a wallworks as advertised, well constructed, plenty of punch for a 20X12 room, playing music not DESTRUCTO video games.
Date published: 2015-11-11
Rated 5 out of 5 by from Twice as nice for the price.Been looking at this plate amp for a while wondering if it would work with my converted Klipsh Promedia 5.1 sub woofer. I bought it years ago with a bad Bash amp and hooked it up to run passively with a Technic amplifier with built in 100watt sub amp. Worked great but I thought it time to move into the 21st century with HDMI (PE has some great prices on HDMI cables BTW). Unfortunately, just using the high level inputs from the front channels didn't develop enough current to drive the twin 8" woofers.The woofers are 6ohm nominal each. I took a chance and wired them in parallel temporarily and played the David Gilmore "Live In Gadinsk" DVD at substantial volume. After tweaking the controls for crossover and level, I just sat and listened (I love that concert), getting up now and again to feel the amplifier. It never heated more than warm, actually cooler than I thought it would be.A happy camper, I'll solder up the leads tomorrow and be happy. My wife will be happy too since I didn't have to bring my 15" Klipsch Subwoofer into the den. That stays inthe theatre room.In summary, The Dayton 70W plate amp is a good value, does what it's supposed to for a great price. Buy one.
Date published: 2015-11-04
Rated 5 out of 5 by from Nice plate amplifier for a small applicationGetting back into my audio hobby, I bought a DC160-8 6 1/2 inch woofer back in 2012 for an amplified subwoofer project using the SA70 70W subwoofer plate (45w at 8ohms) amplifier. I mounted the SA70 amp in back of a 11x11x11 enclosure. Tuned with a 1 1/2 in port at 5inches giving around 42HZ. The results are good deep lows not boomy to complement a 2.1 setup in a 11 ft by 13 ft room. The SA70 was and still is a good choice for this application.
Date published: 2015-10-04
Rated 5 out of 5 by from Nice ampI am using two of these to power 8 Aura bass shakers, each handling 4 with a 4 ohm load. More than enough power. The bass shakers are very efficient. Peaks at 15 to 20 w per amp delivers tremendous shake, adding incredible impact to a HT setup. No need for anything more.
Date published: 2015-09-28
Rated 5 out of 5 by from Good Clean PowerPurchased this amplifier along with two peerless 51/4 sub-woofer that were on clearance at PA, and was blown away by this amplifiers performance. This amp coupled with the dual 51/4 sub-woofer held its own against the bigger brother 12 inch sub-woofer I use in my living room. I am very impressed with this amp's performance.
Date published: 2015-05-22
Rated 5 out of 5 by from Great easy to installI got the speaker at a flea market and it never worked good. I was going to throw it away then went looking on the net for a replacement amp when I found this one Couldnot be any easier to install plug in the speaker wires screw the amp in place and you are good. Did have to trim the opening a bit but sounds great.
Date published: 2015-03-01
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Product Q&A

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Dayton Audio SA70 70W Subwoofer Plate Amplifier

Why am I not seeing dimensions for these amps, eg overall height and width, minimum cutout required? A lot of us are looking to replace one that has failed, looking to find one that will fit what we've got.

Asked by: Sterling L
The Plate and cutout dimensions are the last line in the specifications. For this amp they are: 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.
Answered by: Chrisf
Date published: 2016-03-07

Hello, would the 70w be accumulative with the 50w I am pushing now adding this SA70 to the system or just the 70w? I was hoping to end up with 120w. Thanks

Asked by: Rob G
The power will not add up. If you use the high level inputs it will knock that signal down to something safe for the amp and the amp will produce 70 watts.
Answered by: Chrisf
Date published: 2016-02-16

There is not enough room in my passive subwoofer box for this plate amp. Can it be laid on the floor next to the subwoofer without an enclosure? Or should I build an enclosure for it?

Asked by: GeoB
It is not any problem electrically to use this without a box. That will work fine.
Answered by: Chrisf
Date published: 2016-02-13

I worded my last questions poorly. I have a two speaker/channel 100w Boston Acoustics passive subwoofer. I wired the 8ohms speakers in parallel making them 4ohms. Will this amp do in good job powering this subwoofer or should I get the hundred watt amp?

Asked by: GeoB
this is certainly capable of driving a 4 ohm load. !00 watts is a little better in terms of headroom, but will not make a meaningful difference in output.
Answered by: Chrisf
Date published: 2016-02-13

Is this enough amp to power a 100w Boston Acoustics passive  sub with left and right speakers at 8ohms? I have them wired in parralel so now 4ohms. Or should I get the 100w plate amp? There's no extra room in sub box, can these sit on ground next to sub?

Asked by: GeoB
this will only power a subwoofer. It does not have any power avail;able for satellite speakers, that is just a pass through for when the high level inputs are being used.
Answered by: Chrisf
Date published: 2016-02-13

Have a Panisonic HTIB 8" Subwoofer. Wanted use an amp so i can hook it up to my new receiver. It is a 250 watt max, 6ohm . Would this be a suitable amp , Dayton Audio SA70 70W Subwoofer Plate Amplifier?

Asked by: Jarine94
It is certainly possible that this will work for that application. The power is much lower than what you are stating though.
Answered by: Chrisf
Date published: 2016-02-17
  • 2016-05-03T06:42CST
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