Rockford Fosgate R2-300X4 Prime Series 4-Channel 75W RMS x 4 at 2 Ohm, Class-D Full-Range Car Amplifier
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What's Inside?
- • 4-Channel Class-D Full-Range Car Amplifier
- • (2) 7" Speaker input harnesses
- • 3mm Allen Hex key
- • (4) 3/4" Screws
- • (4) Flat washers
- • Certificate of Performance
- • Rockford Fosgate contact information
- • Owner's Manual
Why Choose Rockford Fosgate R2-300X4 4-Channel Amplifier?
Seamless OEM Integration with Smart Connectivity
Easily upgrade your factory system with High-Level Input capability and a flexible 2/4 Channel Input Selection Switch for customized setups. Enjoy a clean, noise-free audio signal with Balanced Differential Inputs and RCA Pass-Through Outputs. The Auto-Sense bypass switch ensures smooth compatibility with vehicles using Retained Accessory Power (RAP), making installation smarter and more efficient than ever.
Effortless Setup with Complete Audio Control
Get your system dialed in quickly and accurately with the intuitive C.L.E.A.N. setup feature. Fine-tune your sound independently using front and rear Variable Input Gain controls, and take full command of your audio with fully adjustable 12 dB/octave High and Low Pass Butterworth Crossovers. The top-mounted control panel offers convenient access for quick, on-the-fly adjustments.
Reliable Power with Certified Efficiency
Experience powerful, energy-efficient performance with Full Range Class-D technology, delivering consistent output with minimal heat. Built to meet strict industry standards, this amplifier is both CEA-2006 and CE compliant for trusted quality. Integrated Short Circuit and Over Current Protection ensure your system stays safe, all housed in a rugged cast aluminum heat sink built for long-lasting durability.
Frequently Asked Questions (FAQ)
- • Why won't the amplifier power on?
Check the battery connection, inline fuse, ground wire, and remote turn-on lead from the head unit. A blown fuse, poor ground, or missing remote signal is the most common reason the amplifier won't start.
- • Why does it keep going into protect mode?
Protection mode usually indicates overheating, incorrect speaker impedance, or a shorted speaker wire. Verify the wiring, improve airflow, and ensure the connected speakers meet the recommended load specifications.
- • Why is there no sound from one or more channels?
Inspect the RCA cables, speaker wiring, and amplifier channel connections. Swapping RCA cables between channels can help identify whether the problem is with the amplifier or the audio source.
- • Why do my speakers sound distorted at higher volume?
Distortion often occurs when the gain is set too high or the speakers are overdriven. Lower the gain, verify crossover settings, and confirm the speakers can handle the amplifier's output.
- • Can I bridge two channels to power a subwoofer?
Yes, the amplifier supports bridged operation when wired correctly. Always match the subwoofer's impedance with the amplifier's bridged rating for safe and reliable performance.
- • Why do I hear alternator whine through my speakers?
Alternator noise is usually caused by poor grounding or signal interference. Improve the ground connection and route RCA cables away from power wires to reduce unwanted electrical noise.
- • Why does it become hot during normal use?
Some heat is expected, but excessive temperatures may indicate poor ventilation or incorrect speaker impedance. Install the amplifier in a well-ventilated location and verify the speaker load.
- • Why is one speaker louder than the others?
Check the balance and fade controls before inspecting the speaker wiring and amplifier channels. Loose connections or damaged wiring can result in uneven sound output.
- • How do I properly adjust the gain?
Start with the gain at its minimum setting and slowly increase it while playing clean audio. Stop once the speakers reach full, undistorted output for the best sound quality.
- • Can I use this with factory speakers?
Yes, if the factory speakers can safely handle the amplifier's output power. Upgrading the speakers will usually provide better sound quality and improved overall performance.
- Maximum Power : 300 Watts
- Number of Channels : 4
- Frequency Response : 20-20000 Hz
- Built In Crossovers : Yes
- RMS Power Output : 4x75 Watts
- Amplifier Class : D
- Fuse Rating : 60 A
Features:
- OEM Integration Ready: High Level Input Capable
- Flexible Input Configuration: 2/4 Channel Input Selection Switch
- Clean Signal Path: Balanced Differential Inputs with RCA Pass Through Outputs
- Smart Power Detection: Auto-Sense bypass switch for vehicles with RAP (Retained Accessory Power)
- Easy System Setup: Features C.L.E.A.N. Set-up
- Independent Gain Tuning: Front and Rear Variable Input Gain adjustment level
- Complete Crossover Control: Fully Adjustable 12 dB/octave High and Low pass Butterworth Crossovers
- Convenient Tuning Access: Top Mounted Control Panel
- Efficient Performance: Full Range Class-D
- Certified Quality: CEA-2006 Compliant & CE Compliant
- Built-In System Protection: Short Circuit & Over Current Protection
- Durable Build Quality: Cast aluminum heat sink
Specifications:
- Number of Channels: 4
- Total Power: 300 Watts
- Rated Power
- 50 Watts x 4 @ 4Ω
- 75 Watts x 4 @ 2Ω
- 150 Watts x 2 @ 4Ω Bridged/Mono
- Dynamic Power
- 70 Watts x 4 @ 4Ω
- 115 Watts x 4 @ 2Ω
- 230 Watts x 2 @ 4Ω Bridged/Mono
- Bridgeable: Yes
- Frequency Response: 20 Hz - 20,000 Hz
- Input Sensitivity
- Low-Level: 150 mV - 4 V
- High-Level: 450 mV - 12 V
- Circuit Topology Class: Class-D
- Efficiency (average)
- Total Harmonic Distortion (THD+Noise)
- Signal Input Front Low-Level: 4 RCA
- Front High-Level: 4-Pin Molex
- Rear Low-Level: 4 RCA
- Rear High-Level: 4-Pin Molex
- Input Switch: 2/4 Input (works for RCA/hi-level inputs)
- Signal Output
- Low-Level: 2 RCA (Pass-Thru active with RCA or Hi-Level input)
- Tone Controls: No
- Crossover Controls
- Front High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
- Front Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
- Rear High-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
- Rear Low-Pass: 50 Hz - 250 Hz @ 12dB/Octave Butterworth
- All-Pass: Yes
- Remote Controls: No
- Visual Indicators
- Power/Protect
- C.L.E.A.N. In
- C.L.E.A.N. Out (front)
- C.L.E.A.N. Out (rear)
- Power Wire Gauge: 4 AWG
- Power Input Connector: Compression Terminal Block
- Speaker Wire Gauge: 8 AWG
- Speaker Output Connector: Compression Terminal Block
- Cooling: Convection
- Operating Voltage: 9 - 16 VDC
- Recommended Fuse (not included): 60A
- Max. Current Draw (13.8V Sinewave): 39A
- Dimensions (H x W x D):
- 1.9" x 6.8" x 10.1"
- (4.9 cm x 17.3 cm x 25.5 cm)
- UPC: 780687355821
- Weight: 5
- Authorized Internet Dealer
Warranty: 2 Year(s) Warranty.
This item is accompanied by a manufacturer's warranty. If it is found to be defective, it may be returned to OnlineCarstereo.com for replacement within 2 Year(s) from the original date of purchase with proper return authorization.
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Write a review!
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It feels more powerful than advertised. Had it installed in my Corolla for a while now and the sound quality is really professional. High quality stuff from Rockford Fosgate
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This amp lives up to the hype. Didn't break the bank, but it's a world of difference in sound quality compared to the old one I had. my speaker now sounds way better with them getting hooked up into the amp.
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It's louder than what I've expected. A much cleaner sound now with the amp. Good build quality, which is what I expected since it is a a Rockford. I have been buying their stuff since 5 years ago and they didn't disappoint.
