GRAVITY GR1300.1 Monoblock Watts Car Audio Stereo Amplifier

( Brand: Gravity ), ( Manufacturer Part Number: GR1300.1 ), ( Part Type: Amplifier ), ( Bass Boost: 0 18db ), ( S/n Ratio: Gt; 70db ), ( Dimension: 10.5 X 2.25 X 10.75 Inches ), ( Fuse Rating: 25a ), ( 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 250hz ), ( Country Of Origin: United States )

Review GRAVITY Monoblock 1300 Watts Car Audio Stereo Amplifier Works

The **Gravity GR1300.1 Monoblock 1300-Watt Car Audio Stereo Amplifier** is a high-performance, single-channel powerhouse designed to deliver uncompromising audio excellence for discerning car audio enthusiasts. Engineered with precision and built to withstand the rigors of automotive environments, this monoblock amplifier is a testament to modern amplifier technology, combining raw power with refined sound quality. At its core, the GR1300.1 is a **1300-watt RMS** (4-ohm) powerhouse, capable of driving a single speaker with astonishing clarity and dynamic range, making it ideal for deep-bass applications in subwoofer setups or high-efficiency midrange/high-range speakers. Its **monoblock design** ensures minimal interference between channels, eliminating cross-talk and allowing for a cleaner, more focused audio signal that translates into tighter, more articulate bass and improved overall sound staging.

Built with **high-quality components**, the GR1300.1 features a robust **heat-sink design** and **low-impedance tolerance**, allowing it to handle demanding loads without sacrificing performance or longevity. The amplifier employs **advanced Class-D technology**, which not only enhances efficiency (reducing heat and improving reliability) but also minimizes power draw from the vehicle s electrical system, making it a practical choice for high-power applications without overburdening the alternator. Its **fully regulated power supply** ensures stable voltage delivery, even under fluctuating electrical conditions, while the **overcurrent, overvoltage, and short-circuit protection** circuits safeguard both the amplifier and connected speakers from potential damage.

The GR1300.1 is equipped with a **remote turn-on system**, allowing it to activate only when the car s audio system is powered, conserving battery life and reducing heat buildup. Its **RCA-level input sensitivity** ensures compatibility with a wide range of car audio receivers and processors, while the **low-distortion output stage** delivers a pristine signal to your speakers, enhancing clarity and detail across the entire frequency spectrum. The amplifier s **durable construction**, featuring a **metal chassis** and **high-grade insulation**, ensures it remains cool and reliable even during extended periods of heavy use. Whether paired with a **high-efficiency subwoofer** for thunderous bass or a **premium midrange speaker** for crisp, detailed audio, the GR1300.1 is a versatile and powerful addition to any car audio system, elevating the listening experience with its **unmatched power, efficiency, and sonic precision**.

The **Gravity GR1300.1** is a 1300-watt monoblock amplifier designed for high-performance car audio systems. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the Gravity GR1300.1**

1. **High Power Output**

The amplifier delivers **1300 watts RMS per channel** at 4 ohms, making it one of the most powerful monoblock amplifiers in its class. This ensures strong, distortion-free bass even with high-gain speakers or subwoofers.

2. **Monoblock Design**

A single channel eliminates crossover distortion, allowing for cleaner and more powerful bass reproduction. This is ideal for dedicated subwoofer setups where deep, punchy bass is critical.

3. **High-Quality Components**

Gravity uses **high-current MOSFETs** and a robust power supply, which helps maintain stability under heavy loads. The internal layout is designed to minimize heat buildup, improving longevity.

4. **Remote Turn-On (RTO) Capability**

The amplifier supports **remote turn-on**, allowing it to power on when the car s ignition is turned on (via a relay or direct connection). This is useful for systems where the amp needs to be always ready for instant bass response.

5. **Durable Construction**

The enclosure is made of **high-quality metal**, providing excellent heat dissipation and protection against vibrations. The build quality is generally robust for a car amplifier.

6. **Compatibility with High-Gain Speakers**

The high power output makes it suitable for **high-sensitivity speakers** (e.g., 90 dB or higher), allowing them to perform at their best without requiring excessive voltage.

7. **Easy Installation**

The amplifier features **standard RCA inputs**, a **preamp output**, and a **subwoofer output**, making it straightforward to integrate into most car audio systems. The wiring harness is well-organized, reducing installation complexity.

8. **Good Brand Reputation**

Gravity is a well-known brand in the car audio industry, known for producing reliable amplifiers at competitive prices. Many users report long-term performance without major issues.

---

### **Cons of the Gravity GR1300.1**

1. **Limited Channel Options**

Since it is a **monoblock**, it only drives a single channel. If you need a full-range system (front tweeters and woofers), you ll need to pair it with a separate stereo amplifier, increasing cost and complexity.

2. **No Built-in DSP or EQ**

The amplifier lacks **digital signal processing (DSP)** or advanced equalization features. Users who want precise tone adjustments or time alignment will need an external processor.

3. **No Bluetooth or Wireless Connectivity**

Unlike some modern amplifiers, the GR1300.1 does not support **Bluetooth, Wi-Fi, or wireless streaming**. This limits its compatibility with newer car audio systems that rely on wireless inputs.

4. **No Head Unit Integration (Some Models)**

While it has a **preamp output**, some users report that the **head unit integration (HUI) may not be as seamless** as with higher-end brands. This could affect features like volume control from the radio.

5. **Heat Dissipation Concerns**

Although the metal enclosure helps with heat management, **proper ventilation is still critical**. Installing it in an enclosed space without airflow can lead to overheating, potentially reducing lifespan.

6. **No Built-in Protection Against Short Circuits**

Some competitors offer **more advanced protection circuits**, such as automatic shutdown on overload. While the GR1300.1 has basic protections, it may not be as robust in extreme fault conditions.

7. **Limited Customization**

Unlike some high-end amplifiers, the GR1300.1 does not offer **adjustable crossover settings or phase controls**. This may be a drawback for audiophiles who want fine-tuned tuning.

8. **Price Relative to Alternatives**

While it is competitively priced, some **mid-to-high-end amplifiers** (e.g., from Rockford Fosgate, JL Audio, or Kicker) offer additional features (like DSP, Bluetooth, or better protection) for a similar or slightly higher cost.

---

### **Conclusion**

The **Gravity GR1300.1** is an excellent choice for **dedicated subwoofer setups** where raw power and simplicity are priorities. Its **1300-watt output, monoblock design, and durable construction** make it a strong performer for bass-heavy systems. However, it lacks modern conveniences like Bluetooth, DSP, or wireless connectivity, which may be dealbreakers for users seeking advanced features.

If your primary goal is **deep, powerful bass** without unnecessary complexity, this amplifier delivers. However, if you need a **full-range system with additional features**, you may need to pair it with another amp or consider a more feature-rich model.

---

### **Recommendation**

- You are building a **dedicated subwoofer system** and need maximum power.

- You prefer a **simple, no-frills amplifier** with no unnecessary features.

- You are on a **budget** but still want high performance.

- You plan to install it in a **well-ventilated location** to prevent overheating.

- You need a **full-range system** (front speakers subwoofer) and want a single amplifier.

- You want **Bluetooth, DSP, or wireless connectivity**.

- You require **advanced protection features** or **adjustable crossover settings**.

- You are open to spending slightly more for a **more feature-rich amplifier** (e.g., Rockford Fosgate R1200X4, JL Audio 12D4-1200, or Kicker 400-1200C).

For most **subwoofer-only setups**, the **Gravity GR1300.1 is a solid, reliable choice** that offers excellent value for its power output. However, if you need versatility or modern features, exploring other options may be worthwhile.

Details:

No cables included. The amplifier features a Bass Boost of to 18dB, making it ideal for enhancing low frequencies. With a Max Power output of 1300 watts at 2 Ohms, it offers clear and dynamic audio experience with Signal-to-Noise Ratio greater than 70dB. Whether wired for 2 or 4 Ohm stability, this A/B class amplifier delivers consistent performance and a frequency response of 10Hz to 250Hz.

The Gravity Monoblock 1300 watts Car Audio Stereo Amplifier GR1300.1 is a powerful and reliable amplifier designed for car audio systems.

part #: gr13001 prices

• $84.99-$189.99

specifications caramplifieca:

• brand: Gravity
• mpn: Gr1300.1
• part type: Amplifier
• bass boost: 0 18db
• s/n ratio: Gt; 70db
• dimension: 10.5 X 2.25 X 10.75 Inches
• fuse rating: 25a
• 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 250hz
• country of origin: United States

shipping caramplifieca:

• class: Standard
• service: USPS Ground Advantage
• type: Calculated
• carrier: USPS
• cost: $0.00
• transit: 5-10 Days

seller caramplifieca:

• rating: 100.0%
• # reviews: 47
• city: Sacramento, California

offer caramplifieca:

• sold: 0
• availability: In Stock
• quantity: 1
• started: February 18, 2026
• options: Ship-to-home

returns caramplifieca:

• policy: No Returns

general caramplifieca:

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

payments caramplifieca:

• money order
• credit card: Discover
• wallet: Apple-pay
• other

Gravity GR1300.1 Is Similar To:

• Bgrkitanl0red Gravity True Gauge Amplifier Wiring Kit Watt Amp Car Audio (35.2% similar) Pals if any delay on the shipping...(November 14th, 2018)
• Gbr500.2d Gravity True Rms Micro Ultra Compact Digital Amplifier 704129656222 (39.5% similar) See lower price. 11I, 6500CX, 3002CFX, 629I, 6030CS, 693. No questions asked. Come with 1 full year replacement warranty. Need to talk us. Can the unit with easy step tell exact instruction on how. Perfect for your motorcycle, car, RV, ATV, boat and marine solution. 75 Arnulfo, full or hspf x-over ...(September 25th, 2018)
• Gr-7.1m Gravity Car Audio Amplifier Very Good Condition (46.4% similar) 1m mono-block car audio amplifier is vintage, has some light scuffs, or scratches not bad at all, the plays like it was new, clear and strong Gravity GR-7. Gravity GR-7...(September 7th, 2018)
• Gr.7.1 Gravity Mono Car Audio (44.4% similar) Priced to selling remote included was playing a sub woofer at 2 ohms, has not been tested 1 ohm below specifications are cut and pasted from local online source. 1 mono car audio amplifier has some light scratches throughout the chrome finish, not bad, still looks good no issues, plays great...(September 11th, 2017)
• Gr1200.2 Gravity Amplifier (35.4% similar) Variable low pass crossover. Variable gain controls. Led power and protection indicators. Maximum output power: 2400W 2 ohms 1 Thad: 1200WX2 4OHMS 600WX1 nc low pass filter: 50HZ-250HZ high 80HZ-1. Chrome plated rca inputs. Features features: misfit bridgeable 2 channel amplifier remote sub woofer ...(October 27th, 2018)
• Gr1400.2 Gravity New Channels Amp Class Car Audio Stereo 704129656482 (41.7% similar) Four class ab high-current dual discrete drive stages class technology misfit wpm power supply bridgeable Teri-mode operation continuously variable 12DB octave high pass low crossover for deep bass control enhanced boost 50HZCHROME plated rca power, speaker terminal soft start muting overload, ...(October 15th, 2018)
• Gr2600.1 Gravity New Monoblock Amp Class Car Audio Stereo 704129656505 (57.1% similar) 1 monoblock amplifier 2 ohm stable 2600W with led indicator product highlights: looking for that amazing sound from your car stereo. Its the job of an to magnify music is powerful, clean, even, and uninterrupted. The biggest challenge is finding best stereo amplifiers in market to power your sub ...(October 15th, 2018)
• Gr4100.1 Gravity New Monoblock Amp Class Car Audio Stereo 704129656512 (57.1% similar) The biggest challenge is finding best stereo amplifiers in market to power your sub woofer and simplify search. 3 inches package contents: 1 brand new GR4100. This amplifier is for you. It is the best amplifier for your money. The remote sensing capability of this class-ab amplifier detects voltage...(October 15th, 2018)
• Gr600.2 Gravity New Channels Amp Class Car Audio Stereo 704129656468 (42% similar) This amplifier is for you. They are designed to carry out the low-frequency high-frequency sounds like deep bass and high treble typically offer features boost that specific your speakers. Brand new genuine Gravity GR600. Four class ab high-current dual discrete drive stages class technology misfit ...(October 15th, 2018)
• Gr8200 Gravity New Channels Amp Class Car Audio Stereo 704129656529 (42.3% similar) The class ab amplifier, also known as stereo is typically setup for powering your speakers. Its 2 ohm stable technology, which uses better circuitry, maintains a clean power output to let your speakers perform without distortion. They are designed to carry out the low-frequency high-frequency sounds...(October 16th, 2018)
• Wz1000.4 Gravity Audio Car Amplifiers Channels Not Working Please Read In (43.4% similar) Z-edition car amplifiers 4 channels made in Korea-not working protect light keep pop on I did open up inspect all circus board looking good no damaged or blowup parts. This item for someone know how to repair is internal part problem need testing and ship fast free...(August 22nd, 2018)