5 out of 5
Yung SD300 300W Class D Subwoofer Plate Amplifier Module No Boost
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Product Description
Manufacturer Part Number: 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!
Key Features:
Overview:
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) Built-in subsonic filter at 30 Hz 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
Specification:
Manuals & Resources:
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!
Key Features:
- 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
Overview:
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) Built-in subsonic filter at 30 Hz 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
Specification:
Product Details | |
|---|---|
| Brand | Yung International |
| Model | SD300 |
| Part Number | 301-508 |
| UPC | 844632095627 |
| Unit of Measure | Each |
| Weight | 3.7 |
Manuals & Resources:
Attention CA Residents: Prop 65 Warning
WARNING:
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.p65warnings.ca.gov.
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Customer Reviews
By THOMAS S RUSSELL
Date: December 01, 2025
It's a simple plate amplifier,does what it's supposed to,provide power and sound adjustment for a subwoofer.
Rating: 
[4 of 5 Stars!]
[4 of 5 Stars!]
By dutchtreat
Date: October 07, 2024
This is a response to a user who did not know what the phase control is for. It makes sure that at the frequency where your main speakers drop off and the sub takes over, they don't cancel each other out in the room. In other words, the woofer cones all move outward and inward perfectly in time with each other.
Rating: 
[5 of 5 Stars!]
[5 of 5 Stars!]
By At1bob
Date: October 19, 2023
It sounds fine and works well. I'm not an audiophile but I am a bit of a home theater buff. For movies my subs now rock. I have a pair of subs in the front of my home theater system, I routed the rca cable through this and to the other sub. I used a base test app on my phone and sat in the middle of them, they where about 12 feet apart and used the gain settings to try and balance the volume between them. Not to technical..lol I then used the home theater system to balance the audio for my seating position. (its automated). Anyway after watching a few movies I can now feel the rumble and the deep bass hits from the movies. My wife says its too loud but what does she know.... So for as far as I'm concerned it really does enhance my home theater movie viewing experience. It was really easy to install electrically, but i had to add a little wood to the back of my polk audio psw505 since the plate it mounts on is just a little smaller then the original polk amp. It also sounds pretty good when I crank up the tunes.
Rating: [5 of 5 Stars!]
[5 of 5 Stars!]
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