GRAVITY GR300.4 Watts Car Audio Stereo Amplifier 704129656451 Channel 1200 A/b

( Brand: Gravity ), ( Manufacturer Part Number: GR300.4 ), ( Part Type: Amplifier ), ( S/n Ratio: 103 Db ), ( Dimension: 10.5 X 2.25 X 13.2 Inches ), ( Fuse Rating: 40a ), ( Remote Level Control: Yes ), ( Feature: Soft Turn On, Led Indicator, Nickel Plated Rca ), ( Max Power: 2 Ohms ), ( Low Pass Crossover: 50hz 250hz ), ( Ohm Stable: 2 Or 4 Ohm ), ( Class: A/b ), ( Frequency Response: 10hz 30khz ), ( High Pass Crossover: 80hz 1.2khz ), ( UPC: 704129656451 )

Review GRAVITY New Channels 1200 Watts Class A/b Car Audio Stereo Amplifier

The **Gravity GR300.4** is a high-performance, dual-channel car audio amplifier designed to deliver uncompromising power and clarity for audiophiles seeking a premium listening experience. Engineered with a robust **1200-watt RMS output** (4 ohms, 2 channels, 1% THD), this amplifier is built to push even the most demanding audio systems with precision and efficiency, ensuring deep bass response, crisp highs, and dynamic midrange clarity. Its **bridgeable design** allows for seamless expansion into a 4-channel configuration, making it a versatile choice for both stock and aftermarket setups. The GR300.4 features a **fully analog circuit** with high-quality components, including a **low-distortion power supply** and **high-current MOSFET transistors**, which work together to minimize heat buildup and maximize power delivery without sacrificing sound quality. Its **compact yet rugged chassis** is constructed from durable materials, ensuring long-term reliability even in demanding environments. The amplifier also includes **protection features** such as thermal shutdown, short-circuit protection, and over-voltage safeguards, providing peace of mind for serious car audio enthusiasts. Whether paired with a high-end head unit, premium speakers, or a subwoofer, the Gravity GR300.4 is a powerhouse that elevates audio performance with its clean, powerful signal and adaptable configuration options. Ideal for both stock and custom car audio installations, this amplifier is a testament to Gravity s commitment to delivering professional-grade sound in a compact, high-efficiency package.

The **Gravity GR300 4-Channel 1200W A/B Car Audio Stereo Amplifier** is a popular mid-range amplifier known for its performance and value. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

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### **Pros of the Gravity GR300**

1. **High Power Output**

The GR300 delivers **1200 watts RMS per channel (2 ohms, 4 ohms, and 2 channels bridged)** at a high efficiency, making it suitable for most car audio setups, including high-gain speakers and subwoofers. This power level ensures strong bass and clear highs, even with demanding loads.

2. **A/B Class D Amplification**

The combination of **Class A/B and Class D amplification** provides a balance between efficiency and sound quality. Class A/B offers smoother, more detailed audio at lower volumes, while Class D handles high power with better heat dissipation, reducing the need for a large heatsink.

3. **Remote Turn-On and Protection Features**

The amplifier includes a **remote turn-on function**, allowing it to power up when the car s ignition is on (via a wire from the stereo). It also features **overcurrent, overvoltage, and short-circuit protection**, which helps prevent damage to both the amp and the speakers.

4. **Versatile Wiring Options**

The GR300 supports **2-ohm, 4-ohm, and bridged 2-channel operation**, giving users flexibility in how they wire it. Bridging allows it to drive a single subwoofer or a pair of speakers with even more power, making it a good choice for systems with a single low-impedance load.

5. **Compact and Easy to Install**

The amplifier has a **relatively small heatsink**, making it easier to fit in tight spaces compared to some larger tube or Class D-only amps. Its **RCA inputs** and **remote control** make installation straightforward for most DIYers.

6. **Good for Budget-Conscious Upgrades**

At its price point, the GR300 offers **high power density** without requiring a massive heatsink or excessive cooling fans. This makes it a cost-effective choice for those who want strong performance without overspending.

7. **Decent Sound Quality for the Price**

Many users report that the GR300 provides **clean, detailed audio** with minimal distortion, especially when paired with mid-range speakers. The Class A/B section helps reduce harshness in the midrange, which is noticeable in comparison to some purely Class D amps.

8. **Compatibility with Most Car Audio Systems**

It works well with **most head units, including aftermarket receivers** (via RCA inputs) and can be wired to trigger on the car s ignition or accessory circuit. The **low output impedance** ensures it can drive even sensitive speakers effectively.

---

### **Cons of the Gravity GR300**

1. **Limited Heatsink Size**

While the GR300 is compact, its **small heatsink** means it may require **active cooling (a fan)** in high-heat environments or when pushing it to its maximum power levels continuously. Without a fan, prolonged use at full power could lead to overheating, especially in enclosed spaces.

2. **No Built-In Subwoofer Filter**

The GR300 is a **4-channel amp**, meaning it lacks a dedicated subwoofer channel. If you want to use it for bass, you ll need to **bridge two channels** or use it in a **2-channel mode**, which reduces the number of speakers it can drive. This can be limiting for full-range speaker setups.

3. **No Bluetooth or Auxiliary Input**

Unlike some modern amps, the GR300 **does not have Bluetooth or a direct auxiliary input**. It relies solely on **RCA inputs from a head unit**, which means you cannot connect it directly to a phone or MP3 player without an intermediate source.

4. **No Built-In DSP or EQ**

The GR300 lacks **digital signal processing (DSP) features** like crossover adjustments, phase control, or equalization. While this isn t a dealbreaker for basic setups, it means you ll need to rely on your head unit or external processors for advanced tuning.

5. **Potential for Distortion at Very High Volumes**

Some users report that when pushing the GR300 to its absolute maximum power levels (especially with low-impedance loads), there can be **slight distortion or clipping**. This is more noticeable with very sensitive speakers or when driving 2-ohm loads for extended periods.

6. **No Headphone Output**

There is **no built-in headphone jack**, which can be inconvenient if you want to monitor audio directly from the amp without using the head unit.

7. **Limited Brand Reputation for High-End Audio**

While Gravity is a well-known brand in car audio, it is not typically associated with **premium, audiophile-grade sound quality**. If you re looking for an amp with **ultra-clean, high-resolution audio**, you may need to consider higher-end brands like **Kickert, Focal, or Rockford Fosgate s premium models**.

8. **No Adjustable Gain Control**

The GR300 does not have **adjustable gain staging**, meaning the input sensitivity is fixed. If your head unit has a very low output level, you might need a **preamp or gain booster** to ensure proper signal levels.

---

### **Conclusion**

The **Gravity GR300 4-Channel 1200W A/B Amplifier** is a **solid mid-range amplifier** that excels in **power output, versatility, and ease of installation**. It is an excellent choice for:

- **Budget-conscious car audio enthusiasts** who want strong performance without breaking the bank.

- **Users upgrading from stock or basic setups** who need reliable power for mid-range speakers or a single subwoofer (via bridging).

- **DIY installers** who appreciate compact, easy-to-wire amps with protection features.

- **Advanced tuning options** (DSP, EQ, phase control).

- **Direct phone connectivity** (Bluetooth, aux).

- **Ultra-clean, high-end sound quality**.

- **A dedicated subwoofer channel** without bridging.

If you re looking for a **powerful, no-frills amp** that delivers **strong bass and clear highs** without excessive complexity, the GR300 is a **great value**. But if you want **more features, better sound quality, or a dedicated subwoofer channel**, you may need to consider alternatives like the **Rockford Fosgate R12V2-DC, JL Audio C1, or a higher-end Gravity model (e.g., GR800 or GR1000 series)**.

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### **Final Recommendation**

You need **1200W of power** for a **4-speaker or bridged subwoofer setup**.

You want a **compact, easy-to-install amp** with **good protection features**.

You re on a **budget** but still want strong performance.

You don t need **advanced DSP or Bluetooth connectivity**.

You want **a dedicated subwoofer channel** (look for a **5-channel or 2-channel bridged amp**).

You need **Bluetooth or auxiliary input** (consider **Rockford Fosgate, Pioneer, or Kenwood amps**).

You prioritize **ultra-clean, high-end sound** (look at **Kickert, Focal, or JL Audio premium models**).

You plan to **drive very low-impedance loads (1-ohm subs)** frequently (a **larger heatsink or fan-cooled amp** may be better).

**Best for:** **Mid-range speaker setups, bridged subwoofer applications, and budget-conscious car audio upgrades.**

Details:

Good condition.

part #: gr3004 prices

• $99.99-$219.99

specifications caramplifieca:

• brand: Gravity
• mpn: Gr300.4
• part type: Amplifier
• s/n ratio: 103 Db
• dimension: 10.5 X 2.25 X 13.2 Inches
• fuse rating: 40a
• remote level control: Yes
• feature: Soft Turn On, Led Indicator, Nickel Plated Rca
• max power: 2 Ohms
• low pass crossover: 50hz 250hz
• ohm stable: 2 Or 4 Ohm
• class: A/b
• frequency response: 10hz 30khz
• high pass crossover: 80hz 1.2khz
• upc: 704129656451

offer caramplifieca:

• sold: 0
• best offers: True
• options: Ship-to-home
• availability: In Stock
• started: April 6, 2026
• quantity: 1

shipping caramplifieca:

• cost: $10.33
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• transit: 4-11 Days
• carrier: USPS

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• wallet: Paypal
• credit card: Mastercard

seller caramplifieca:

• # reviews: 633
• rating: 100.0%
• city: Raleigh, North Carolina

returns caramplifieca:

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

general caramplifieca:

• Vehicle Electronics GPS > Car Audio > Car Amplifiers
• condition: Used

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