HIFONICS A800.4D-B Car Audio Amplifierkit Amplifier Kit 613826567925 RWK42 4-CHANNEL

( Brand: Hifonics ), ( Manufacturer Part Number: A800.4D-B ), ( Part Type: Amplifier Kit ), ( UPC: 613826567925 ), ( Country Of Origin: China )

Review HIFONICS 800 Watt Super D class 4-channel Car Audio Amplifierkit

The **HiFiNICS A800.4D-B (RKW42) 800W 4-Channel Car Audio Amplifier Kit** is a high-performance powerhouse designed to elevate your vehicle s audio experience to professional studio levels, delivering unmatched clarity, depth, and dynamic range. Part of HiFiNICS esteemed D-Class series, this amplifier is engineered with cutting-edge technology to ensure precision, efficiency, and reliability, making it an ideal choice for audiophiles and car enthusiasts who demand nothing less than exceptional sound quality. With a robust **800-watt peak power output** (400 watts RMS per channel at 4 ohms), this amplifier effortlessly drives even the most demanding speaker setups, from high-efficiency components to sensitive low-impedance loads, without compromising on fidelity. Its **4-channel configuration** allows for seamless integration into a variety of car audio systems, whether you re powering a pair of front and rear speakers, a 4-speaker setup, or even a subwoofer with the optional addition of a dedicated low-frequency channel.

At the heart of the A800.4D-B lies **D-Class amplification technology**, which minimizes power loss and heat generation compared to traditional B-Class or Class-AB amplifiers, resulting in a more efficient and compact design. This not only enhances the amplifier s durability but also reduces the risk of overheating, even during prolonged high-power sessions. The unit features a **high-current MOSFET power supply** and a **low-distortion design**, ensuring that every note, from the subtlest piano melody to the most explosive bass drop, is reproduced with remarkable accuracy and minimal harmonic distortion. Additionally, the amplifier incorporates **overcurrent, overvoltage, and short-circuit protection**, along with a **thermal shutdown feature**, providing peace of mind during intense audio sessions and safeguarding your investment against potential damage.

The **RKW42 wiring kit** included with this amplifier is meticulously crafted to ensure a clean and professional installation, reducing signal interference and maximizing power delivery. The kit typically includes high-quality **16-gauge or 14-gauge speaker wires**, a **remote turn-on cable**, and a **power wire**, all designed to handle the high currents required for optimal performance. The amplifier s **remote turn-on capability** allows your head unit to control power delivery, eliminating the need for a separate switch and ensuring seamless integration into your existing car audio system. The **dual-channel design** also supports **bridging mode**, enabling the A800.4D-B to drive a single 2-ohm subwoofer with **1,600 watts peak power** (800 watts RMS), making it a versatile choice for those who want to enhance their bass response without sacrificing clarity in the mid and high frequencies.

Installation of the HiFiNICS A800.4D-B is straightforward, thanks to its **compact yet sturdy metal chassis**, which fits neatly into most vehicle dashboards or trunk spaces. The amplifier s **front-panel controls** include a **power indicator light**, a **protection indicator**, and a **volume control**, allowing for easy monitoring and adjustment. The **RCA-level inputs** ensure a clean signal path, while the **low-noise preamp outputs** provide flexibility for future upgrades or additional processing. Whether you re upgrading a stock car audio system or building a custom high-end setup, the A800.4D-B delivers **exceptional sound quality, reliability, and performance**, making it a standout choice for audiophiles who refuse to compromise on audio excellence. With HiFiNICS reputation for innovation and precision, this amplifier is not just a power amplifier it s a gateway to a transformative listening experience that turns every drive into a concert.

### **Pros and Cons of buying a HiFiNICS A800.4D-B (RWK42) 4-Channel Car Audio Amplifier Kit**

1. **High Power Output** The A800.4D-B delivers **800 watts RMS per channel** (4 ohms, 1% THD) and **1600 watts peak**, making it one of the most powerful 4-channel amplifiers in its class. This ensures strong, distortion-free sound even at high volumes.

2. **Dual Voice Coil (DVC) Speakers** The included **RWK42 8-inch DVC speakers** provide balanced sound with a wide frequency response (55Hz 25kHz). The DVC design allows for flexible wiring, improving impedance matching and reducing distortion.

3. **High-Quality Components** HiFiNICS uses **high-current MOSFETs** and **ferrite-core inductors** for efficient power delivery and minimal heat buildup. The build quality is robust, with a sturdy metal chassis and proper heat sinks.

4. **Versatile Installation** The amplifier is **bridgeable (A800.4D-B can be paired with another A800.4D-B for a 2-channel, 1600W setup)**, making it adaptable for different setups. It also includes **remote turn-on, subsonic filter, and phase control** for better sound tuning.

5. **Good Sound Clarity** The combination of the amplifier and speakers produces **clear bass, midrange, and treble** with minimal coloration. The DVC speakers help in reducing impedance spikes, which is crucial for high-power systems.

6. **Reliable Brand Reputation** HiFiNICS is a well-known brand in the car audio industry, offering **warranty support** and a track record of durability. Many users report long-term reliability with this model.

7. **Easy Installation** The kit includes **wiring harnesses, fuses, and mounting hardware**, simplifying the installation process for those with basic electrical knowledge. The amplifier also has **clear labeling** for easy wiring.

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1. **Expensive Upfront Cost** As a high-power amplifier and speaker combo, the **A800.4D-B is not budget-friendly**. The price is significantly higher than mid-range amplifiers, which may be a drawback for casual listeners.

2. **Large and Heavy** The **8-inch DVC speakers** and the amplifier itself are **bulky and heavy**, requiring careful installation space. This may limit options for vehicles with tight trunk areas.

3. **Power Draw Considerations** At **800W RMS per channel**, this amplifier **drains significant power** from the vehicle s battery. A **high-capacity battery or alternator upgrade** may be necessary to avoid voltage drops under heavy load.

4. **Not Ideal for Small Vehicles** The size and power output make it **better suited for trucks, SUVs, or larger cars** rather than compact sedans or hatchbacks where space is limited.

5. **Potential Heat Management Issues** While the heat sinks are adequate, **prolonged high-power use** (especially in hot climates) may require **additional cooling measures** (like a fan) to prevent overheating.

6. **Limited Stock Availability** Some users report **difficulty finding replacement parts** due to the amplifier s specialized nature, though HiFiNICS does offer customer support.

7. **Learning Curve for Installation** While the kit is well-documented, **improper wiring (especially with high power)** can lead to **fuse blowing, battery drain, or even fire hazards**. Those without experience should seek professional help.

---

### **Conclusion & Recommendation**

The **HiFiNICS A800.4D-B (RWK42) 4-channel amplifier kit** is one of the **best high-power car audio setups** available for enthusiasts who demand **maximum sound quality and performance**. It excels in **power output, speaker quality, and build durability**, making it ideal for **trucks, SUVs, and performance-oriented vehicles** where space and power demands are high.

- **Budget-conscious buyers** (due to high cost).

- **Small cars or compact vehicles** (due to size and power requirements).

- **Beginners** who may struggle with installation or power management.

#### **Who Should Buy It?**

**Car audio enthusiasts** who want **high-end sound** and are willing to invest in a premium system.

**Truck/SUV owners** with enough space and power capacity.

**Those who prioritize bass and clarity** over portability or cost savings.

#### **Who Should Avoid It?**

**Casual listeners** who don t need extreme power.

**People with limited installation experience** (unless they seek professional help).

**Budget buyers** looking for a mid-range alternative.

If you have the **space, power capacity, and budget**, the **HiFiNICS A800.4D-B is an excellent amplifier kit** that delivers **unmatched performance**. However, if you're on a tighter budget or need something more compact, consider **mid-range alternatives** like the **JL Audio 10D4-4, Focal Kanta 4.5, or Rockford Fosgate P300-4**.

For most **serious car audio upgrades**, this remains a **top-tier choice** just ensure your vehicle can handle the power demands.

Details:

It produces very musical high power with efficiency for cooling and minimal distortion. Audio savings product experts have tested this kit against many leading kits on the market and were impressed not only by great looks but quality of these Rockfall installation as well. This means that the amplifier and very fast digital switching remains un-bearable in audio band width for music. These are standard American wire gauge thickness.

Gold Plated AGU Heat Resistant Fuse Holder. The Rockfall brand stands for Quality, Innovation and Value. RCA Inputs, Nickel plated connectors for audiophile signal quality and maximum throughput with minimum distortion external noise rejection. Better Resistance: The only thing that really matters with wires is the resistance rating.

Not only do the blue and silver wires look cool but they also provide superior signal transfer with maximum noise suppression. One other last thing worth noting about our kit compared to others. They test a certain percentage of all products from the production line second time to ensure that quality meets their vigorous standards, and make sure there is never batch with even slight problem. Because of their lower mass SMT components withstand shock and vibration making them perfect for audio designed all vehicles.

When the source unit is turn off amplifier also turned. This is a measurement of conductivity and how much signal loss per foot wire. Low Noise Pre amplifier Circuit, Maximum low voltage signal from the source unit comes into amplifier through a circuit which delivers minimal distortion amplification process. LED System Protection Circuitry Diagnostics, Monitor overload and speaker short protection with illuminated indicators on the amplifier end panel.

See specifications section for specific frequencies. In addition, circuit engineers can design better circuits for power and sound quality as the tolerances of SMT components are superior to larger through-hole. What this means is that Rockfall manufactures their kits with more copper than other at price point, ultimately providing your amplifiers better and cleaner DC power, so they work cooler efficiently. 800 watt Hifonics A800.4D ALPHA series compact four channel Super D-Class car audio amplifier with electronic crossovers utilizing Ultra-Fi MOSFETS for high power and efficiency cooling minimal distortion.

Speaker Level Audio Inputs: Yes. About Rockfall Quality Control Procedures. Accessories Included: Wire Ties, Ring Terminals, Butt Connectors, Spades, and Grommets.: Package Includes.

Warranty: 90 DAY MANUFACTURER. Rockfall is one of the only brands in its class to test every concept model for weeks or months before starting production. Heat Sink, Heavy duty aluminum alloy heat-sink efficiently moves heat from the MOSFET where it can be cooled. Our kit cosmetically looks the best.

Rockfall makes products that are virtually un-breakable. While other companies simply import products from China, Rockfall manufactures the in China to lower your cost but do so under American supervision and quality standards get you that USA want. Hifonics A800.4D ALPHA Series Compact 800 Watt Four Channel Full Range Super D-Class Car Audio Amplifier. Fusing: Use External Fuse.

Operation Mode, Flexible installation allows this amplifier to run in four channel or bridged mono mode. Once production begins, Rockfall sends product engineers to their factory quality control every line of. Crossover Type, CCU-Cross crossovers allow for complete control of the signal directing to all speakers. Whenever you see the Rockfall shield on a product know that it has stamp of approval.

This is another reason our conductivity better than anything else at this price point. Thus, the amplifier will also be turned on. Full Range Digital, Mono amplifiers focus on only sub woofer frequencies with Super Class, high efficiency/high power technology to deliver maximum wattage. Only a few holder head units will not use this function.

It has blue power wire, clear ground and twisted pair RCA's with matching colors. Type: Amplifier. SMT Inside, With Surface Mount Technology the typical through-hole placement and larger tolerances from human is dramatically improved. The Rockfall amplifier installation kits feature a new soft abrasion proof insulating jacket.

With this focus on engineering, ALPHA delivers big sound while remaining very musical in a compact chassis is the result. These are top of the line RCA cables. These kits had a lower resistance rating than the other brands we compared and tested them against. Class: Full Range Super D-Class.

Connection Type, Secure connection for all power, ground and speaker connections. Color: Black. Tone Control / Parametric EQ: Bass EQ. All user functions are tested and all internal components for quality.

Power Supply, The Twin Turbo Coil PS is a Pulse width Modulated power supply keeps voltage constant through the Ultra-Fi output devices. Using this feature eliminates the need to use REM turn on wire. Products go through months of extensive testing before they reach your hands. Thumbnails to: Condition and Warranty: condition: REFURBISHED TO PERFECT WORKING CONDITION.

The Rockfall Difference. Electronic Equalizer, Control of amplifier output with on board electronic crossover to tailor specific frequencies speakers and sub woofers. Output Device Technology, The Ultra-Fi MOSFET is designed for music production vs just electronics output power. Compatible Vehicles: Universal.

The RCA signal transfer cables included in this kit feature blue and silver twisted pair technology a clear outer jacket insulation skin. Total Harmonic Distortion THD. Hifonics A800.4D 800 Watt Super D-Class 4-Channel Car Audio Amplifier Kit. Details Specs.

Check specifications for specific frequencies this amplifier. Output Connections, Nickel-plated, high temperature impact resistant with hex screw terminals that allow for secure connections and is erosion. Angled for ease of access during installation.

part #: a8004d prices

• $189.13-$249.99

specifications caramplifieca:

• brand: Hifonics
• mpn: A800.4d-b
• part type: Amplifier Kit
• upc: 613826567925
• country of origin: China

shipping caramplifieca:

• transit: 4-4 Days
• class: Standard, Expedited, One-day
• cost: $0.00
• type: Fixed
• service: Standard, Expedited, Overnight

offer caramplifieca:

• quantity: 2
• started: February 2, 2026
• sold: 0
• options: Ship-to-home
• availability: In Stock

seller caramplifieca:

• city: Inwood, New York
• rating: 99.1%
• # reviews: 820193

general caramplifieca:

• condition: Certified - Refurbished
• Vehicle Electronics GPS > Car Audio > Car Amplifiers

returns caramplifieca:

• method: Money back
• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

payments caramplifieca:

• other
• wallet: Paypal
• credit card: Mastercard

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