Check the listing for details. NEW SKAR AUDIO SA-125.4D 720 WATT FULL-RANGE CLASS D 4 CHANNEL AMPLIFIER. Condition: New. Listed at 254.99 USD. Welcome to Our eBay Store Amplifiers SK-M-Series RP-Series SKv2 Series RP-Marine Series Subwoofers IX Series VD Series SDR Series SVR Series DDX Series EVL Series VXF Series ZVXv2 Series Empty Subwoofer Boxes Speakers RPX Series TX Series FSX Series SPX Series Tweeters Loaded Enclosures SDR Series SVR Series EVL Series Loaded Tube Enclosures Empty Enclosures 8" Enclosures 10" Enclosures 12" Enclosures 15" Enclosures 18" Enclosures Vehicle Specific More Complete Bundles Car Audio Marine Audio Amplifier Wiring Other Amplifiers Subwoofers Speakers Loaded Enclosures Empty Enclosures Complete Bundles Amp Kits, Wiring & More NEW SKAR AUDIO SA-125.4D 720 WATT FULL-RANGE CLASS D 4 CHANNEL AMPLIFIER Description The Skar Audio SA-125.4D is a high-performance four-channel amplifier, designed to take your car audio system to the next level. Delivering a total of 720 watts RMS power, this Class D amplifier provides 125 watts x 4 channels at 4 ohms, 180 watts x 4 channels at 2 ohms, and an impressive 285 watts x 2 channels when bridged at 4 ohms. Its compact and efficient design makes it ideal for those seeking dynamic sound quality with minimal space requirements. With a broad frequency response range of 10Hz to 25kHz, this amplifier ensures accurate and clear audio reproduction across all frequencies. Adjustable high-pass and low-pass filters (50Hz to 250Hz) allow you to fine-tune your sound for optimal performance. The amplifier’s 70A fuse rating and 4 AWG power/ground input size highlight its durable construction and reliable safety features. The SA-125.4D includes user-friendly controls for gain and crossover adjustments, supporting HPF, LPF, and FULL modes to suit any audio setup. Additional features such as RCA preouts, high-level inputs, and auto remote turn-on functionality ensure seamless integration into any sound system. The amplifier’s LED status indicator provides clear operational feedback, with blue indicating normal operation and red signaling protection mode. Compact in size, this amplifier is designed for easy installation and includes a removable terminal design that streamlines both setup and maintenance. Whether you’re upgrading a stock system or building a custom high-performance setup, the SA-125.4D delivers the precision, power, and reliability you need for an exceptional audio experience. Specifications Skar Audio SA-125.4D Class D 4-Channel Amplifier 4 Way Protection Circuitry: Thermal, Voltage, Speaker, DC RMS Power @ 4 Ohms: 125 Watts x 4 Channel (14.4v) RMS Power @ 4 Ohms (Bridged): 285 Watts x 2 Channel (14.4v) RMS Power @ 2 Ohms: 180 Watts x 4 Channel (14.4v) High Speed MOSFET Power Supply Auto Remote Turn On Switch Frequency Response: 10Hz ~ 25kHz Signal to Noise Ratio: 90dB Input Sensitivity @ 4 Ohm: 175mV Low Pass Filter (Variable): 50 Hz ~ 250 Hz High Pass Filter (Variable): 50 Hz ~ 250 Hz Subsonic Filter: 10Hz ~ 50Hz 4 Gauge Power and Ground Terminals Working Voltage: 8.5V-16V Fuse Rating: 70 Amp Dimensions: 10.43" (Length) x 5.98" (Width) x 2.12" (Height) About Us Shipping Returns Contact Us Skar Audio was founded with the principle of designing and manufacturing the highest quality car audio products backed by world class customer support. We believe that our customers define who we are as a company, which is why we believe so strongly in putting them first. To fulfill that promise, Skar Audio operates primarily from its state of the art, 100,000 sq. ft. world headquarters, located in St. Petersburg, Florida. However, we also have additional distribution facilities spread across the country to ensure we continue to elevate ourselves as a brand that delivers a truly world class shopping experience. Our team is composed of incredibly hard working and dedicated individuals who are audiophiles themselves. Our team along with our incredible supporters (you!) are the reason Skar Audio has been ranked amongst Inc. 5000’s fastest growing companies in America for 2019, as well as NewsWeek’s best online shops of 2020. Who does Skar Audio use to ship my purchase? Due to varying rates and shipping times, Skar Audio uses a variety of shipping carriers including USPS, UPS, and FedEx. While most normalizedItems will be sent via UPS, it is not uncommon to receive normalizedItems via another carrier when it makes sense as the best option to care for our customers purchases. Do I qualify for free shipping? Skar Audio is happy to offer retail customers who order directly from Skar Audio's official website free shipping to the continental United States for orders over $50. Currently, customers residing in Hawaii and Alaska do not qualify for free shipping. International shipments will be subject to shipping costs that are calculated at the time of purchase, and will be subject to any fees or duties charged by the carrier additionally. Please be aware that these duties and fees are not calculated into the shipping cost at the time of checkout. Does Skar Audio ship internationally? Due to factors beyond our control, we have suspended all international shipping on orders made directly via Skar Audio's official website effective 9/20/2020. Our internal team is working diligently to restore this service and create a better experience for our customers who do not reside domestically within the United States. We do not currently have an estimated time that this service will be available to our friends outside of the United States, however, we will be happy to announce once we are able to re-establish this service for our customers outside the United States. Additional shipping options may be available via other authorized retailers like Amazon or eBay if purchasing from their platform. Please contact these retailers directly to confirm their policies and options that they might have available to you. How long will it take to get my order? Skar Audio has strategically expanded operations within the US, and can reach most of the United States in 3 business days. We make an effort to ship out orders the same day if the orders are made during business hours. Any orders placed over the weekend or after business hours will ship out the following business day. Does Skar Audio offer expedited shipping? Skar Audio does offer expedited shipping options at an additional cost. The options available vary based upon area and can be viewed during the checkout process. If I purchase an item on backorder, when should I expect to receive it? Skar Audio is constantly forecasting to keep product from going out of stock; however, unexpected trends in sales may lead to a shortage of a product. When this happens, Skar Audio will always post the expected return date of the product right on the product's page. Once the item arrives back in stock, we ship all backorders immediately. If you’re having second thoughts or a sudden change of heart on your recent purchase, don’t worry, we've got you covered. You have 30 days from the original purchase date to return any item(s) from your order for a full refund. Please Don't Hesitate To Contact Us. 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