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Are you searching for the perfect amplifier to enhance your car audio experience? Look no further! In this review, we will be comparing various sound amplifiers from different brands, including Soundigital and Stetsom. These products offer exceptional power and quality, allowing you to enjoy your favorite music with impeccable clarity and depth. Whether you're a savvy audiophile or simply a music lover on the go, these amplifiers are designed to deliver an immersive and dynamic sound. Amplifiers have been an integral part of car audio systems for many years, and they continue to evolve to meet the demands of modern technology. These products are specifically designed to boost the power of audio signals, ensuring that every note and beat is amplified to its fullest potential. Owning a high-quality amplifier provides numerous benefits, such as improved sound quality, increased volume levels, and the ability to customize and control your audio experience. With the right amplifier, you can transform your car into a mobile concert hall and enjoy a superior audio performance. Now, let's dive into the details of each product. In this review, we will take a closer look at the Amplifier SOUNDIGITAL 800.4 EVO 4.0 Stereo Digital 4 OHMS, Soundigital 800W RMS 4 Channel Amplifier 800.4 EVOX2 4 Ohm Vehicle Amp (Renewed), Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Wats RMS Bridged Car Amplifier, SOUNDIGITAL SD1200.4 4 OHMS EVO 5 Amplifier 1200 WATTS RMS 4 Channels, SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed), Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier (Renewed), SounDigital 400.4-EVOX-4OHM, and Stetsom Bravo HQ 800.4 Multichannel Car Audio Digital Amplifier. Each of these amplifiers possesses unique features and specifications that cater to different audio preferences and installation requirements. Stay tuned to find the perfect amplifier that suits your needs! Soundigital 800.4 EVO 4.0 Stereo Digital Amplifier - 4 OHMS The Amplifier SOUNDIGITAL 800.4 EVO 4.0 Stereo Digital 4 OHMS is a versatile and powerful amplifier that is specifically designed to enhance the audio experience in any vehicle. It is perfect for those who are passionate about their car audio systems and want to achieve crystal clear sound quality. This amplifier stands out from its competitors due to its impressive features and exceptional performance. It delivers high-power output, allowing users to enjoy their music with greater clarity and depth. The SOUNDIGITAL 800.4 EVO 4.0 is perfect for music enthusiasts, car audio professionals, and anyone who wants to take their audio system to the next level. The primary purpose of the SOUNDIGITAL 800.4 EVO 4.0 is to amplify the audio signals in a car's audio system. It has a power output of 800 watts, making it capable of producing loud and clear sound even at high volumes. This amplifier is a four-channel stereo system, offering users the ability to connect multiple speakers and create a surround sound experience. Key features of the SOUNDIGITAL 800.4 EVO 4.0 include its compact and sleek design, which allows for easy installation in any vehicle. It also has a high-quality digital circuit that ensures minimal distortion and accurate sound reproduction. Additionally, it has a built-in cooling system that prevents overheating and extends the amplifier's lifespan. The SOUNDIGITAL 800.4 EVO 4.0 is known for its outstanding quality and durability. It is built with high-grade materials that are designed to withstand the rigors of regular use. The amplifier's precise engineering ensures optimal performance and reliability, ensuring that users can enjoy their favorite music without any interruptions or distortion. Pros: High-power output for clear and loud sound Four-channel stereo system for a surround sound experience Compact and sleek design for easy installation Minimal distortion and accurate sound reproduction Built-in cooling system for extended lifespan Cons: May be more expensive compared to other amplifiers in the market Requires professional installation for optimal performance The SOUNDIGITAL 800.4 EVO 4.0 is a top-of-the-line amplifier that delivers exceptional audio quality. Its powerful output, compact design, and durability make it an excellent choice for those looking to upgrade their car audio system. With its impressive features and solid performance, it is no wonder why the SOUNDIGITAL 800.4 EVO 4.0 is highly regarded in the industry. Soundigital 800W RMS 4-Channel Amplifier for Vehicles (Renewed) The Soundigital 800W RMS 4 Channel Amplifier 800.4 EVOX2 4 Ohm Vehicle Amp (Renewed) is designed to enhance the sound quality of your vehicle's audio system. It is ideal for car enthusiasts who want to elevate their driving experience with powerful and crystal-clear audio. We appreciate this product for its exceptional performance and reliability. It delivers a remarkable output power, ensuring that every beat and note in your music is reproduced with incredible clarity and precision. Moreover, its compact size allows for easy installation, making it suitable for various types of vehicles. The Soundigital 800.4 EVOX2 is a 4-channel amplifier that provides a maximum output power of 800W RMS. It is equipped with advanced technology and features that ensure optimal sound reproduction. The amplifier operates in a wide frequency response range of 5Hz to 22kHz, allowing it to handle a diverse range of musical genres. One of the key features of this amplifier is its low pass and high pass filter, which helps in eliminating unwanted frequencies and focusing on the desired range. This ensures that each component of your music is heard with precision, resulting in a more immersive listening experience. Additionally, the amplifier operates at a voltage range of 8V to 16V, allowing it to work efficiently with various car electrical systems. The Soundigital 800.4 EVOX2 4-Ohm Vehicle Amp offers exceptional build quality and durability. With its renewed condition, it undergoes rigorous testing and refurbishing processes to ensure that it operates at its best performance. The amplifier is made from high-quality materials that can withstand the demands of a vehicle's environment, ensuring its longevity. Some of the pros of the Soundigital 800.4 EVOX2 include its powerful output, compact size, and versatile frequency response range. It provides excellent sound quality and is compatible with various car audio systems. However, one potential drawback is that it may require professional installation for optimal performance. The Soundigital 800.4 EVOX2 4 Ohm Vehicle Amp (Renewed) is a top-of-the-line amplifier that offers exceptional sound quality and durability. With its powerful output and advanced features, it is an excellent choice for car enthusiasts who value outstanding audio performance. Soundigital 800.4 EVO X 4Ohm Car Amplifier - 200 Watts RMS The Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Watts RMS Bridged Car Amplifier is designed for car audio enthusiasts who are looking to enhance their in-car audio experience. Whether you enjoy blasting your favorite songs on road trips or simply want to enjoy crystal-clear sound quality during your everyday commute, this amplifier is perfect for you. We love the Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Watts RMS Bridged Car Amplifier for several reasons. Firstly, it offers exceptional power output, ensuring that your music is loud and clear even in the noisiest environments. The amplifier provides a maximum power of 446 Watts RMS when bridged at 14.4V, allowing you to enjoy the full impact of your favorite tracks. Additionally, this amplifier features high-quality components that ensure accurate sound reproduction. With a signal-to-noise ratio of 91dB, you can expect minimal background noise and distortion, resulting in a clean and dynamic audio experience. The Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Watts RMS Bridged Car Amplifier serves the purpose of amplifying the audio signals from your car's audio system. It enhances the power and clarity of your music, allowing you to hear every detail with precision. Key features of this amplifier include a high-pass filter (45Hz - 850Hz), a low-pass filter (45Hz - 850Hz), and a comprehensive frequency response range (-3dB) of 5Hz to 22kHz. These features enable you to customize the audio output to suit your preferences and optimize the sound quality based on the type of music you're listening to. The Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Watts RMS Bridged Car Amplifier boasts excellent overall quality. Made with durable materials and advanced circuitry, this amplifier is built to withstand the demands of daily use while delivering outstanding performance. Furthermore, its compact dimensions (5.8 x 4.4 x 2.0 in) make it easy to install in your car without taking up excessive space. Powerful and clear sound output High-quality components for accurate sound reproduction Versatile filters for customizing audio output Compact and space-efficient design Professional installation is required for optimal performance The Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Watts RMS Bridged Car Amplifier is a fantastic choice for car audio enthusiasts. Its powerful performance, high-quality components, and customizable features make it an excellent addition to any car audio system. Soundigital SD1200.4 4 Ohm Evo 5 Amplifier 1200 Watts RMS 4 Channels The Soundigital SD1200.4 4 Ohms EVO 5 Amplifier is primarily designed for car audio enthusiasts who crave high-quality sound performance in their vehicles. With its powerful 1200 watts RMS and 4 channels, this amplifier provides exceptional sound clarity and volume, making it ideal for those seeking a superior audio experience on the road. One of the standout features of the Soundigital SD1200.4 is its remarkable sound quality. This amplifier delivers crisp and clear audio, enhancing every note and beat of your favorite tracks. Its 1200 watts RMS output ensures that you can enjoy powerful bass and rich tones, allowing you to fully immerse yourself in the music. The Soundigital SD1200.4 is also highly versatile, accommodating a wide range of audio systems. Its 4 channels give you the flexibility to connect multiple speakers, allowing you to customize your car audio setup to suit your preferences. Additionally, this amplifier is highly efficient, ensuring that it optimizes power consumption while maximizing performance. The Soundigital SD1200.4 aims to provide car audio enthusiasts with a high-performance amplifier that delivers exceptional sound quality and power. Whether you enjoy listening to music, podcasts, or audiobooks during your daily commute or desire an immersive audio experience on a road trip, this amplifier has you covered. 1200 watts RMS 4 channels for versatile speaker connection options Efficient power consumption Compact and durable design Soundigital is renowned for its commitment to producing top-quality audio equipment, and the SD1200.4 is no exception. This amplifier exemplifies their dedication to delivering reliable, high-performance products that exceed expectations. Exceptional sound quality Powerful 1200 watts RMS output Versatile 4-channel configuration Efficient power consumption Durable construction May be more expensive compared to other amplifiers in the market Not suitable for those seeking a budget-friendly option The Soundigital SD1200.4 4 Ohms EVO 5 Amplifier is an excellent choice for car audio enthusiasts in search of exceptional sound quality and power. Its versatile design, impressive performance, and durable construction make it a worthwhile investment for those seeking an elevated audio experience on the road. SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed) - Simplified Version: Renewed SounDigital 800.4 EVOPS 4-Channel All Weather Amplifier The SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed) is primarily used for enhancing sound quality in various vehicles, including cars, trucks, boats, and powersports vehicles. It is designed to deliver powerful and clear audio performance, making it a popular choice among audiophiles and music enthusiasts. There are several reasons why we like the SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed). Firstly, it offers exceptional versatility, allowing users to connect multiple speakers and subwoofers simultaneously. This amplifies the audio output, resulting in immersive and high-quality sound. Additionally, this amplifier is equipped with advanced weatherproofing technology, making it suitable for outdoor use, such as in boats and powersports vehicles. Its rugged construction ensures durability and longevity, even in harsh weather conditions. Furthermore, this renewed version of the amplifier provides the same performance and features as a new one, but at a more affordable price. This makes it an excellent choice for individuals who want to enjoy superior audio without breaking the bank. The SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier is designed to amplify and enhance the sound output in vehicles. With its four channels, it offers the flexibility to connect multiple speakers and subwoofers, creating a surround sound experience. Key features of this amplifier include its impressive power output of 132 WRMS per channel at 4Ω and 200 WRMS per channel at 2Ω. It also features a high-pass filter (HPF) and low-pass filter (LPF) with a frequency range of 45Hz – 850Hz, allowing users to customize the sound to their preferences. Additionally, the amplifier boasts a signal-to-noise ratio of 91dB, ensuring minimal distortion and maximum audio clarity. With its compact dimensions of 5.7 x 5.1 x 2.2 inches (14.4 x 13 x 5.6 cm), it can be easily installed in various vehicle types. The SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed) is recognized for its outstanding build quality and performance. The amplifier is constructed using high-quality materials and undergoes rigorous testing to ensure its reliability and durability. Its ability to deliver powerful and clear sound amplification makes it a top choice among audio enthusiasts. Versatile, allowing for multiple speaker and subwoofer connections Weatherproof design for outdoor use Renewed version offers affordability without compromising performance Compact dimensions for easy installation Not compatible with all vehicle models May require professional installation for optimal performance Renewed Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier The Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier is designed for car audio enthusiasts looking to enhance their vehicle's sound system. It is specifically built to deliver powerful and high-quality audio performance, making it a perfect choice for those who want to enjoy their favorite music on the road. We are impressed with the Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier for several reasons. Firstly, its power output is remarkable. With 132 WRMS per channel at 4 ohms and the ability to bridge to 2 channels at 400 WRMS, this amplifier can provide clear and dynamic sound even at higher volume levels. Additionally, the amplifier offers a wide range of frequencies response (-5Hz to 22kHz) with a signal-to-noise ratio (SNR) of -91dB. This ensures that every detail of the music is reproduced accurately, resulting in an immersive audio experience for the listener. Furthermore, the Soundigital 800.4 Evox is equipped with both high-pass and low-pass filters, allowing users to customize the sound output according to their preferences. This flexibility enables them to optimize the amplifier's performance for different types of music and speaker setups. The primary purpose of the Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier is to provide exceptional sound quality and power output for car audio systems. It is built with high-quality components and advanced technologies to ensure reliable and consistent performance. Key features of this amplifier include its power output at different impedance levels, frequency response, signal-to-noise ratio, and the ability to bridge channels. The high-pass and low-pass filters further enhance the amplifier's versatility and allow users to fine-tune the sound to suit their preferences and audio system. The Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier excels in both build quality and audio performance. With its durable construction and advanced circuitry, it is designed to withstand the rigors of daily use while delivering exceptional audio quality. Users can expect a reliable and long-lasting amplifier that elevates their car audio experience. Pros: Impressive power output Wide frequency response High signal-to-noise ratio Versatile with high-pass and low-pass filters Durable construction Cons: Limited bridging options Lack of power output at 1 ohm impedance The Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier is a top choice for car audio enthusiasts seeking powerful and high-quality sound. Its impressive power output, wide frequency response, and versatile features make it a reliable and excellent addition to any car audio system. SounDigital 400.4-EVOX-4OHM simplified version: SounDigital 400.4 Amplifier The SounDigital 400.4-EVOX-4OHM is a high-performance sound digital amplifier designed for car audio systems. It is specifically designed to provide clean and powerful sound for your vehicle's speakers. One of the main reasons we like the SounDigital 400.4-EVOX-4OHM is its exceptional power output. With 4 X 66 WRMS power at 12.6V @ 4Ω and 4 X 100 WRMS power at 12.6V @ 2Ω, this amplifier ensures that your music is delivered with clarity and impact. The purpose of the SounDigital 400.4-EVOX-4OHM is to enhance the audio experience in your car. It is equipped with a wide frequency response range of 5Hz – 22kHz, ensuring that it can reproduce both deep bass and crisp highs. The built-in high-pass and low-pass filters (45Hz – 850Hz) allow you to customize the sound according to your preferences. Additionally, this amplifier is compact in size, measuring 4.8 x 4.4 x 2.0 inches, making it easy to install in various locations in your vehicle. Its signal-to-noise ratio of 88dB ensures that the audio signals are free from unwanted noise or distortion. In terms of overall quality, the SounDigital 400.4-EVOX-4OHM stands out with its durable construction and reliable performance. It is built to withstand the demanding conditions of car audio installations, providing you with a long-lasting and reliable sound solution. Powerful and clean sound output Wide frequency response range for accurate audio reproduction Compact size for easy installation Durable construction for long-lasting performance Suitable for car audio systems Professional installation required Not compatible with all car audio systems The SounDigital 400.4-EVOX-4OHM is a top choice for car audio enthusiasts who prioritize exceptional sound quality and performance. With its powerful output, customizable sound options, and durable construction, this amplifier is sure to enhance your driving experience. However, it is important to note that professional installation is required, and compatibility with all car audio systems may vary. [Stetsom Bravo HQ 800.4 Multichannel Car Audio Digital Amplifier - 2 Ohms Stable - 800 Watts RMS 4 Independent Channels (CH1 and CH2 / CH3 and CH4) Full Range Car Stereo ds Bridge Speakers 800x4 Simplified Version: Stetsom Bravo HQ 800.4 Multichannel Car Amplifier - 800 Watts RMS - 4 Channels](https://www.amazon.com/dp/B0CD96811S?tag=singersroomgear-20) The Stetsom Bravo HQ 800.4 Multichannel Car Audio Digital Amplifier is designed for audio enthusiasts who want to elevate their car audio experience. Its versatile features make it suitable for use with subwoofers, woofers, drivers, and tweeters. We are impressed by the premium sound quality that the Stetsom Bravo HQ 800.4 offers. With a frequency response of 10Hz to 22kHz, it ensures unparalleled audio quality and definition. This amplifier allows users to enjoy their music with exceptional clarity and depth, enhancing their overall listening experience. The Stetsom Bravo HQ 800.4 is a digital amplifier that provides four independent channels (CH1 and CH2 / CH3 and CH4) for a full range car stereo experience. It offers both RCA input connections and high input connections, providing versatile connectivity options for various audio outputs. This ensures a clean audio signal and prevents unwanted noise. One of the standout features of this amplifier is the level control, which allows users to adjust the signal levels for optimal speaker performance. This enables users to have full control over the output of their music, ensuring well-balanced sound throughout their car. Additionally, the variable crossover feature allows users to fine-tune their audio settings like a pro. With the ability to set the crossover cut-off range from 50Hz to 2.3kHz and choose between HPF, FLAT, and LPF modes, users can shape their sound exactly as they desire. The Stetsom Bravo HQ 800.4 is also equipped with an intelligent cooling and protection system. It features an automatic and adjustable cooler system that optimizes ventilation, ensuring worry-free usage. Furthermore, the smart protection system detects faults and automatically shuts down, indicated by the PROT LED (RED) flash pattern. The Stetsom Bravo HQ 800.4 Multichannel Car Audio Digital Amplifier promises exceptional quality and performance. Its premium sound quality, versatile connectivity options, and advanced features make it a reliable choice for audio enthusiasts seeking an outstanding car audio experience. Premium sound quality with a wide frequency response Versatile connectivity options Level control for precise output adjustment Variable crossover feature for professional audio fine-tuning Intelligent cooling and protection system None reported so far Simplified Version: Stetsom Bravo HQ 800.4 Multichannel Car Amplifier - 800 Watts RMS - 4 Channels" href="https://www.amazon.com/dp/B0CD96811S?tag=singersroomgear-20" style='text-decoration: none; box-shadow: none;'> Comparison of Amplifier Specifications Specification 800.4 EVO 4.0 800.4 EVOX2 4 Ohm Vehicle Amp (Renewed) 8004EVOX4 446 Wats RMS Bridged Car Amplifier SD1200.4 4 OHMS EVO 5 Amplifier EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed) Evox 4 Ohm 4 Channel Car Amplifier (Renewed) 400.4-EVOX-4OHM Stetsom Bravo HQ 800.4 Power @ 2Ω 4X 200W 4X 200 WRMS 4X 200 WRMS N/A 4X 200 WRMS 4X 200 WRMS 4X 200 WRMS N/A Power @ 4Ω 4X 132W 4X 132 WRMS 4X 132 WRMS N/A 4X 132 WRMS 4X 132 WRMS 4X 132 WRMS N/A Bridge Power @ 4Ω 2X 400W 2X 400 WRMS 2X 400 WRMS N/A N/A N/A N/A 2X 400 WRMS Bridge Power @ 8Ω 2X 264W N/A N/A N/A N/A N/A N/A N/A Frequency Response 5Hz ~ 22kHz 5Hz ~ 22kHz 5Hz ~ 22kHz N/A 5Hz ~ 22kHz 5Hz ~ 22kHz 5Hz ~ 22kHz 10Hz ~ 22kHz Low Pass and High Pass Filter 45Hz ~ 850Hz 45Hz ~ 850Hz 45Hz ~ 850Hz N/A 45Hz ~ 850Hz 45Hz ~ 850Hz 45Hz ~ 850Hz N/A Operating Voltage 8V ~ 16V N/A N/A N/A N/A N/A N/A N/A SNR 91dB 91dB 91dB N/A N/A N/A 91dB N/A Product Dimensions (in inches) 5.8 x 4.4 x 2.0 N/A N/A N/A N/A N/A N/A N/A Product Dimensions (in cm) 14.8 x 11.3 x 5.1 N/A N/A N/A N/A N/A N/A N/A Professional Installation Required No Yes Yes Yes Yes Yes Yes Yes Comparison of Amplifier Features Soundigital 800.4 EVO 4.0 Stereo Digital 4 OHMS Power @ 2Ω: 4X 200W Power @ 4Ω: 4X 132W Bridge Power @ 4Ω: 2X 400W Frequency Response: 5Hz ~ 22kHz Low Pass and High Pass Filter: 45Hz ~ 850Hz Operating Voltage: 8V ~ 16V SNR: 91dB Product Dimensions: 5.8 x 4.4 x 2.0 in Soundigital 800.4 EVOX2 4 Ohm Vehicle Amp (Renewed) Power @ 12.6V @ 4Ω: 4X 132 WRMS Power @ 12.6V @ 2Ω: 4X 200 WRMS Bridge Power @ 12.6V @ 4Ω: 2X 400 WRMS Power @ 14.4V @ 4Ω: 4X 147 WRMS Power @ 14.4V @ 2Ω: 4X 223 WRMS Bridge Power @ 14.4V @ 4Ω: 2X 446 WRMS Crossover HPF: 45Hz – 850Hz Crossover LPF: 45Hz – 850Hz SNR: 91dB Product Dimensions: 5.8 x 4.4 x 2.0 in Professional Installation Required Soundigital 800.4 EVO X 4Ohm 200 Watts RMS 8004EVOX4 446 Wats RMS Bridged Car Amplifier Power @ 12.6V @ 4Ω: 4X 132 WRMS Power @ 12.6V @ 2Ω: 4X 200 WRMS Bridge Power @ 12.6V @ 4Ω: 2X 400 WRMS Power @ 14.4V @ 4Ω: 4X 147 WRMS Power @ 14.4V @ 2Ω: 4X 223 WRMS Bridge Power @ 14.4V @ 4Ω: 2X 446 WRMS Crossover HPF: 45Hz – 850Hz Crossover LPF: 45Hz – 850Hz SNR: 91dB Product Dimensions: 5.8 x 4.4 x 2.0 in Professional Installation Required SOUNDIGITAL SD1200.4 4 OHMS EVO 5 Amplifier 1200 WATTS RMS 4 Channels Power @ 2Ω: N/A Power @ 4Ω: N/A Bridge Power @ 4Ω: N/A Frequency Response: N/A Low Pass and High Pass Filter: N/A SNR: N/A SounDigital 800.4 EVOPS 4 Channel 4 Ohm All Weather Amplifier (Renewed) Power @ 2Ω: 4X 200 WRMS Power @ 4Ω: 4X 132 WRMS Bridge Power @ 4Ω: N/A Frequency Response: 5Hz – 22kHz Low Pass and High Pass Filter: 45Hz – 850Hz SNR: N/A Product Dimensions: N/A Professional Installation Required Soundigital 800.4 Evox 4 Ohm 4 Channel Car Amplifier (Renewed) Power @ 2Ω: 4X 200 WRMS Power @ 4Ω: 4X 132 WRMS Bridge Power @ 4Ω: N/A Frequency Response: 5Hz – 22kHz Low Pass and High Pass Filter: 45Hz – 850Hz SNR: N/A Product Dimensions: N/A Professional Installation Required SounDigital 400.4-EVOX-4OHM Power @ 2Ω: 4X 200 WRMS Power @ 4Ω: 4X 132 WRMS Bridge Power @ 4Ω: N/A Frequency Response: 5Hz – 22kHz Low Pass and High Pass Filter: 45Hz – 850Hz SNR: 91dB Product Dimensions: 4.8 x 4.4 x 2.0 in Professional Installation Required Stetsom Bravo HQ 800.4 Multichannel Car Audio Digital Amplifier Power @ 2Ω: N/A Power @ 4Ω: N/A Bridge Power @ 4Ω: 2X 400 WRMS Frequency Response: 10Hz – 22kHz Low Pass and High Pass Filter: N/A SNR: N/A Product Dimensions: N/A Professional Installation Required Note: The "N/A" values indicate that the information was not provided for that specific product. Conclusion After reviewing all eight products, it is clear that the Amplifier SOUNDIGITAL brand offers a range of options for car audio enthusiasts. Each amplifier has its own unique features and specifications, catering to different needs and preferences. Despite some drawbacks, there is a model suitable for every specific audience. Drawbacks While the SOUNDIGITAL amplifiers have many positive features, there are some drawbacks to consider. The "Renewed" models may come with cosmetic flaws, but this does not affect their functionality. Additionally, the 800.4 EVOX2 and 800.4 EVOPS models may not be as powerful as some users may prefer. Recommendation For car audio enthusiasts who value high power and versatility, the SOUNDIGITAL 800.4 EVO 4.0 Stereo Digital 4 OHMS amplifier is recommended. With 800W RMS and 4 channels, this amplifier offers great performance and flexibility. Additionally, the renewed version of the Soundigital 800.4 EVO X 4Ohm is a good choice for budget-conscious individuals who still want exceptional sound quality. Overall, the Amplifier SOUNDIGITAL brand provides a range of options that cater to various needs and preferences in the car audio market. Whether you are seeking maximum power or budget-friendly options, there is an amplifier available for you.