Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost

Brand:| Model: SD300
The Yung SD300 300W Class D subwoofer amplifier module produces 300 watts of continuous, honest power, which is enough to drive most home subwoofer speaker systems to very high playback volumes!
  • Class D amplifier circuit with switching power supply provides excellent efficiency
  • Capable of sustained, continuous output without thermal shutdown
  • Built-in limiter circuit protection prevents peak overloads
  • Low-level, high-level, and LFE inputs for flexible interconnection
  • Manual and automatic on/off mode options
  • Fully adjustable phase, gain, and crossover points ensure system optimization
  • Switchable 115/230V input voltage
Part # 
Weight: 3.7 lbs.  
List Price$229.99
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Part # 301-508
Qty:  EA
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Product Details

Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost

Yung International's SD Series Class D subwoofer power amplifiers are equipped with the unique ability to operate continuously at full rated output—a performance attribute not shared by most home audio amp designs. The benefits of this remarkable reserve capacity include solid, punchy dynamic range and fewer "nuisance" shutdowns when operated at sustained high levels.

The amplifiers are also extremely compact, lightweight, and cool-running, allowing users to enjoy the advantages of compact system form factors and flexibility of placement. An internal peak limiting circuit prevents amplifier overload, and protection against internal and external faults is also provided. Input power requirements are user configurable to either 115 VAC or 230 VAC line voltage.

Room optimization and system integration are accomplished easily, thanks to the SD Series amps' inclusion of fully variable level, crossover frequency, and phase controls. Signal input is connected via dual RCA-type jacks, including the means to accept the output of an A/V receiver's LFE output, and dual RCA jacks are also provided to facilitate line level loop-through. The amplifier also accepts high (or speaker) level input signals through binding post terminals. When in standby mode, the amp's full active operation is engaged by signal presence of less than 1/2 watt.

Specifications: • Measured power output: 300 watts RMS into 4 ohms @ < 1.0% THD • Signal to noise ratio (at rated power): >90 dB • Input sensitivity (@ low level): 210 mV/50 Hz • Input sensitivity (@ high level): 3.0V/50 Hz • Low pass adjustment: 40 Hz to 200 Hz • Phase adjustment: Continuously variable from 0º (normal) to 180º (reverse) • Power requirements: Switchable, 115/230 VAC, 50/60 Hz • Dimensions: 10" W x 7-3/8" H x 2-1/2" D; Cutout dimensions: 9-1/4" W x 6-5/8" H.

Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost
  • BrandYung International
  • ModelSD300
  • Part Number301-508
  • UPC844632095627
  • Product CategorySubwoofer Plate Amplifiers
  • Unit of MeasureEA
  • Product Rating
    (13 Reviews)
  • Weight3.7 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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Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost
Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost is rated 4.6154 out of 5 by 13.
Rated 5 out of 5 by from Nice unit, and I used it a bit unconventionallyThis unit is powering a cylinder-type subwoofer I built some time back and put into storage to maybe sell. I already have pairs of cylinder subs in each of my audio rigs, and this one involved a left-over piece of Sonotube and a spare driver. I decided to put the sub to use as a third unit in my home-theater system, and I will probably end up selling it off after a while. For now, it is probably overkill. Anyway, I did not care to install a plate amp in a cylinder sub, so I built a small wooden enclosure (I do a lot of woodworking), and the package is now on the floor, pretty much out of sight. Saves some shelf space. The amp works fine. It runs cool and has more than enough 4-ohm power to light up the driver. I have only three negative observations, neither of which is a big deal. First, there is no eight-ohm rating for the amp. It would be nice to know what that is. Second, there is no input-impedance rating. That would be nice to know, especially if one intended to double up the units from a single LFE output on a receiver. Third, it has only two power-set options: "off" and "auto." It would be nice if it had a third: "on," because I switch mine on and off with a power strip. The auto option seems to work nicely enough with the power strip, however. Good amp, so far.
Date published: 2014-09-17
Rated 5 out of 5 by from Great amp with nice features.I purchased this item to make a home theater satellite subwoofer with the following items listed bellow:1 x Precision Port 2" Flared Speaker Cabinet Port Tube Kit - tuned to 35Hz1 x Knock-Down MDF 0.67 cu. ft. Subwoofer Speaker Cabinet1 x Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost1 x E8v3D2 SUNDOWN AUDIO PRO 8" SUB DVC 2 OHM 300W RMS BASS SUBWOOFER SPEAKER NEW4 x Rubber feet (screw in) 1" top taper to 3/4" floor footprint, 1/2 length1 x 4 Oz One step Polyurethane Onyx wood stain in multiple coats for a durable finish.The first step was to dry assemble and test fit the cabinet pieces. Once dry fitting was done then was the step of adding adhesive (gorilla glue) and brad nails to cabinet. Four 2x2 pine cleats were also added for front faceplate stability and strengthening where Subwoofer was to be seated as well as overall cabinet stability and strength. The back of the cabinet was also measure and cut according to the cut out area as measured on inside of Yung plate amplifier for a nice snug fit 9" x 6.5". The top rear of cabinet was to be the set location of the precision port and a suitable center line was determined for drilling a pilot hole for the 4.25" cut out using a custom polycarbonate hole gauge on my plunge router with a 1/4 straight router bit.All surfaces were sanded cleaned then the stain was then applied and allowed to dry for 4-6 hours and additional stains were added accordingly 4 times. Once dry the unit was ready for assembly of all pieces after another final dry fit. Pilot Holes for all of the screws for amp, sub and port were made prior to final assembly for ease and to avoid splitting the wood cabinet during final assembly. Once finally and fully assembled this baby went into my new media room and was hooked up to power and into my 9.2 Pioneer 1523K's subwoofer RCA out put. Musically this sub performs as well as most 12" satellite subs and is only an 8" mind you but a very beefy 8" Subwoofer. On any movie and digitally enhanced sound tracks this sub also performs as well as bigger subs but with a much smaller footprint. There is plenty of fine tuning that can be made just by changing the adjustable parameters via controls on the amplifier board also. All in all this is a great amp and the price and quality cannot be beat.Overall it was a pretty simple and fairly straightforward build and would recommend for novice to beginner to build too.
Date published: 2014-08-30
Rated 5 out of 5 by from Very satisfied!!I purchased this plate amp to replace one in a sub that had quite.After modifying the mounting hole to fit and connecting the sub to my home stereo I am very impressed with the performance of this amp.I only wish is that the dimensions for mounting the plate could be specified.
Date published: 2013-09-22
Rated 5 out of 5 by from Great Plate Amp with All The Features You Need.I paired this up with a Dayton Audio RSS265HF-4 10" Reference HF Subwoofer Driver in a Folded Horn Subwoofer enclosure. This was designed to add slam to upper bass/lower mid range as I already had a Large Folded Horn Subwoofer that is solid into the sub sonic range. The pairing work perfectly. The plate amp has all the features you could want for a sub amp and at a price that is very nice. The electronics are NOT enclosed. I built a simple box for it and glued it to the back of the Folded Horn Subwoofer enclosure.(See Picture)
Date published: 2013-09-17
Rated 2 out of 5 by from Yung SD300Amp came with an internal plug not completely pushed on; it took me a while to figure out why it wasn't working. Sound quality is OK but not as good as I remember the original sounding (a JBL PB10 subwoofer). I like the adjustable phase control rather than just having a switch for 0 or 180 degrees.
Date published: 2013-09-15
Rated 4 out of 5 by from Solid performerProvides plenty of power and very little heat dissipation. I've only had one problem and that is with the auto-on circuit not working very well. Sometimes it never sees the signal. For the times it does see the signal, it takes a long time to recognize and turn on (in the order of 5-15 minutes). Otherwise, it's a great sub amp and the Class D design is great for low power consumption and low heat.One deficiency of this amp though is the high pass filter. It's set at a much higher frequency than comparable amps limiting the low end capability of some designs. The exact amount is unknown since neither Yung nor PE state it anywhere, but some independent tests online indicate it's in the range of 21-25Hz. High compared to others ranging in the 13-17Hz which allow you to make designs for great low end reach and LFE.
Date published: 2013-08-21

Product Q&A

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Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost

i have a cerwin vega cls-15s powered sub and the amp is smoked is this amp powerfull enough for the 15" woofer or do i need a bigger one

Asked by: art1961
It looks like the original was also 300 watt, so this amplifier should work fine for this application.
Answered by: MattP
Date published: 2014-10-16

I ordered a model SD300 with no boost. The model I received is a SD300-6. It sounds too boomy with my subwoofer. Is there away to kill the 6db boost? They should include a switch for this purpose.

Asked by: Mooreman
There is no way to eliminate the boost on this amplifier. If you received a different model than you ordered, we will be happy to exchange it for the proper model. Please contact our sales and customer service for better help with this. sales@parts-express.com or 800-338-0531 x2.
Answered by: MattP
Date published: 2014-09-23

There are two sets of RCA inputs, marked line-in and line-out. Do the line-out ports have a high pass filter to block the bass frequencies from reaching the satellite speaker's tube amplifier?

Asked by: Mooreman
The line outputs are straight pass throughs, there is no high pass filter in line.
Answered by: MattP
Date published: 2014-09-23

Does this have enough power to drive Dayton Audio RSS390HF-4 to its full potential?

Asked by: Big_Louis_1971
This amp will allow the sub to produce a good amount of output but we recommend 500 watts in order to use the full potential of the woofer.
Answered by: MattP
Date published: 2014-07-17

could I use this amp plate too replace my 250 amp inside the PSW-D112 12" powered subwoofer?

Asked by: MarkoPoloism
Yes this will work in terms of power, although you may need to modify the cabinet in order for it to fit properly.
Answered by: MattP
Date published: 2014-06-12

I am looking for a replacement control board for an Epik Legend subwoofer.  I know they are closed and the local repair shop here indicated that it was the control board that is fried.  Which would be the best replacement control board for this model? 

Asked by: TedP
If you are referring to the whole amplifier plate, you will have to find one with similar output power to the original. Chances are we do not have one that will be a perfect fit in the enclosure so that will probably have to be modified. If you are referring to a piece of the original amplifier itself, this is probably not available anywhere now that they are out of business.
Answered by: MattP
Date published: 2014-04-15

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