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Dayton Audio SA100 100W Subwoofer Plate Amplifier

Brand:|Model: SA100|Part # 300-802
This Dayton Audio SA100 100 watt subwoofer amplifier with adjustable crossover, high and low level inputs, auto on/off and phase reversal switch is perfect for building your own powered subwoofer. This plate amp offers very stable operation, with full overload protection.
A restocked/refurbished, or Open Box unit of this product is available -- see it now
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List Price$149.99
Regular Price$94.80
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Part # 300-802
  • Low distortion audiophile sound
  • Adjustable low pass crossover
  • High and low level inputs/outputs
  • Auto On/Off
  • Phase reversal switch
  • 75 watts RMS @ 8 ohms, 100 watts RMS @ 4 ohms
  • S/N Ratio: 90 dB (A-weighted)

Product Details

Dayton Audio SA100 100W Subwoofer Plate Amplifier

Small but mighty! The Dayton Audio SA100 high performance subwoofer plate amp module packs big-amp features into a compact chassis that is ideal for installation into cabinets that can't accommodate bulky old-style amps. We made it small, but included everything that you need to connect the amp to your system and get maximum performance. Input/output connections are through your choice of either line level RCA connectors, or speaker level banana jacks. A stereo input signal is summed to mono and sent to the internal low pass crossover, which is selectable from 40 to 180 Hz; the input gain sensitivity is fully adjustable as well.

The SA100 also includes a phase reverse switch, which helps you to achieve the best acoustical match with the rest of your speakers. An Auto On/Off switch keeps the amp standing by, waiting for an input signal to turn it on. A large surface area heat sink is combined with internal overload, thermal, and short circuit protection so that you can expect years of reliable operation.

Specifications: • Measured power output: 75 watts RMS into 8 ohms @ 0.1% THD, 100 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 4-3/4" D • Enclosure cutout: 6-1/2" W x 7-1/2" H • Power requirements: 120 VAC, 60 Hz, 210 watts • Net weight: 7.6 lbs.

Dayton Audio SA100 100W Subwoofer Plate Amplifier
  • BrandDayton Audio
  • ModelSA100
  • Part Number300-802
  • UPC844632015946
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (141 Reviews)
  • Weight8.55 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 SA100 100W Subwoofer Plate Amplifier
Dayton Audio SA100 100W Subwoofer Plate Amplifier is rated 4.5106 out of 5 by 141.
Rated 4 out of 5 by from Overall, I'm happy with this amp.I used this amplifier to repair a Polk Audio PSW110, and I'm very impressed with its audio performance. I'm also happy with the features that it offers, I just have a couple of gripes with it. Connecting the amp to a receiver that only has a single RCA connection for the LFE channel requires a Y-adapter (I used part # 240-125), since connecting to only one of the amplifier's low-level inputs greatly reduces its output. The input issue is a minor one, but it's one that could have been fixed with a mono/stereo switch on the back of the amp. The major issue that I have with this amp is that it draws way too much power when on standby (just under 16 watts), and that's just not acceptable to me. It would probably add significantly to the cost of the amplifier to correct this issue, but the cost in energy over the lifetime of this amp is also significant.I should note that this was not at all a drop in replacement for the PSW110. I had to widen the cutout for the amplifier, widen and deepen the recess for the mounting flange of the amplifier (the amp comes with a nice, thick gasket), and cut out a portion of the internal bracing. In the end I got a fairly clean installation that sounds great.
Date published: 2016-02-27
Rated 5 out of 5 by from The Perfect UpgradeI have used four of these. Two in factory rebuilds and two in new three way with amped subs. Just make an adapter plate or any modification desired in a factory sub and use this amp. Factory amps have no large external heat sinks for the output drivers because they just don't put out the claimed power. These will do the job for most applications.
Date published: 2015-10-10
Rated 5 out of 5 by from What I expectedBought this plate amp to resurrect an older Sony 12" sub. After I removed the back amp housing from the old sub I made the cutout and installed the SA100, it was pretty easy. I am impressed with the performance and all the functions work well.
Date published: 2015-09-23
Rated 4 out of 5 by from Drop-in improvement over the SA70I recently purchased one of these at the sale price, because the SA70 I had been using wasn't quite cutting the mustard driving an Audio Concepts SR10 woofer (4 Ohms) in a .7 cu. ft. sealed enclosure. It fits the same cutout and the screw holes line up exactly.It surpasses the SA70 in delivering a bit more "oomph" to the woofer, and most importantly in having a steeper lowpass filter slope -- 4th order as opposed to 2nd -- which allows it to "get out of the way" quicker. Less midrange info is coming from the subwoofer, which makes it much easier to dial in the crossover to the main speakers.Connectivity is slightly improved over the SA70, but here is where my few minor ergonomic gripes come in:Instead of the hinky press-pinch speaker level connectors of the SA70, which are too small even to accept standard pin connectors, we have a set of fairly dinky binding posts with plastic tightening nuts. These have thin shafts, accommodating small spade lugs, with small holes cross-drilled through them, barely big enough to accommodate twisted ends of 16ga stranded wire. They are jammed too close together to accept standard-spaced dual 'nanners, but will accept single banana plugs (which I have on order). And they are crowded right up against the frequency and level controls above and the heat sink fins below. Trying to get your fingers in there to connect bare wire ends or small spades, and tighten down the nuts, is thus a bit fumbly.For the line-level inputs, you have to connect both the right and left channel RCAs to get the bass from both channels. This is fine if your preamp/receiver has stereo pre-outs, but if you have a single summed sub out you will need a Y-adaptor to split the signal again to two channels.I have had no reason to try either the speaker-level or line-level outputs. No point passing a signal through doubtful electronics when you don't have to.Overall, my subwoofer now plays a bit louder/cleaner, and integrates better with my main speakers, than it did with the SA70 amp in place. This is NOT to diss the SA70, which would be just fine for a smaller or more efficient sub driver, as in a desktop system. I'm saving mine for just such a project later.
Date published: 2015-09-01
Rated 4 out of 5 by from good sound !Replaced my semi working klipsch amp , that worked when it wanted to. so far this one has enough power behind it to push the 12 woofer ! Still playing with it and the settings . but cool so far
Date published: 2015-05-24
Rated 5 out of 5 by from Works well helped put a subwoofer back in serviceI had a pioneer subwoofer that was part of a soundbar assy puloled the old amp out put this one in hooked it up to amp and started enjoying.
Date published: 2015-05-24
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Product Q&A

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Dayton Audio SA100 100W Subwoofer Plate Amplifier

Is this a drop in solution for the dynamo 500?  Do you have to make any modifictions?  

Asked by: thecrest76
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: GregT
Date published: 2016-05-04

Am I required to use a receiver, or can I simply plug an input from one of my devices, then run the speakers from the subwoofer amplifier? I would prefer a simple solution, without having to purchase a receiver. 

Asked by: Jerry38
This will work when connected to a source, but this amplifier is just for the subwoofers and will not power the upper frequency drivers. Some sort of amp would still be needed for that
Answered by: Chrisf
Date published: 2016-04-25

how long is the power cord

Asked by: kbclean
The power cord on this amp is about 6 feet long.
Answered by: MattP
Date published: 2016-01-18

The manual states that the high-level outputs have a 125 Hz first order filter. Is this determined with an 8-ohm speaker load? I'd like to use 4-ohm main speakers (ads L210), but I think this would result in a 250 Hz high-pass filter frequency.

Asked by: Mossytop
Yes the speaker level outputs are high passed with a single cap and are filtered based on an 8 ohm load.
Answered by: MattP
Date published: 2016-01-20

I have an old Boston Acoustics Micro 90 pv sub and the amp burned out. Will this work in that sub?

Asked by: pasta65
We do not have a cross reference available for this type of thing. Please contact our tech support for more help with this question, or 800-338-0531 x1.
Answered by: MattP
Date published: 2016-01-04

I see that there are left and right output posts. Is this amp meant to power a DVC sub, 2 separate subs or are they meant to be bridged to get the rated 100 watts? How should this amp be wired to get the 100 watt output? Thanks in advance 

Asked by: 04Modlite
The two outputs on the face of the amplifier are not powered, these are the through-outs when using the speaker level inputs on the amp. The subwoofer output is via the red and black wires on the back side of the amplifier.
Answered by: MattP
Date published: 2015-12-30
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