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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6
For Your Every Summer RSVP, with Code: SUMMER15
Description
Rockford-Fosgate Prime R300X4Features: Prime Series Full Range Class AB 4 Channel Car Amplifier RMS Power Rating: 4 ohms: 50 watts x 4 chan. 2 ohms: 75 watts x 4 chan. Bridged, 4 ohms: 150 watts x 2 chan. CEA 2006 Compliant Amplifier Pulse Width Modulated MOSFET power supply LED power (green) and protect (red) indicators Soft start turn on 4, 3 or 2 channel operation Speaker level (high level) inputs with included molex plugs 3 way protection circuitry (thermal, overload, and
Features:
- Prime Series Full Range Class AB 4-Channel Car Amplifier
- RMS Power Rating:
- 4 ohms: 50 watts x 4 chan.
- 2 ohms: 75 watts x 4 chan.
- Bridged, 4 ohms: 150 watts x 2 chan.
- CEA-2006 Compliant Amplifier
- Pulse Width Modulated MOSFET power supply
- LED power (green) and protect (red) indicators
- Soft start turn-on
- 4, 3 or 2 channel operation
- Speaker-level (high-level) inputs with included molex plugs
- 3-way protection circuitry (thermal, overload, and speaker short protection)
- Heavy duty aluminum alloy heat-sink for extreme heat dissipation
- Input sensitivity:
- Low level: 150mV - 4V
- High level: 450mV - 12V
- Frequency Response: 20 - 20,000 Hz
- Total Harmonic Distortion (THD): <1%
- Signal to Noise Ration: >100 dB
- Selectable crossover modes: LP / AP / HP
- Variable crossover filter: 50 - 250 Hz, 12 dB/octave
- Selectable Bass Boost, Punch EQ: 0, +6db, +12 dB bass boost at 45 Hz
- 8 - 16 gauge speaker terminals
- 50 Amp In-line fuse is highly recommended, not included
- Dimensions: 13.2"W x 6.8"D x 2"H
Specifications:
Power Specifications - Full Range Channels:
- RMS Power @ 4 ohms: 50 watts x 4 channels
- RMS Power @ 2 ohms: 75 watts x 4 channels
- Bridged RMS Power: 150 watts x 2 channels
Amplifier Specifications:
- Amplifier Series: Prime (Rockford Fosgate)
- Amplifier Class: AB
- Number of Channels: 4
- Total Peak Power Output: 600 watts
- Total RMS Power Output: 300 watts
- Maximum Input Gauge Size: 4 AWG
- Minimum Impedance Unbridged: 2 ohms
- Minimum Impedance Bridged: 4 ohms
- THD at Rated RMS Power: 1.0%
- Speaker Level Inputs: Yes - with included adapter
- Preamp Outputs: 1 pair
- Built-in Crossover: Low-Pass (LP), High-Pass (HP), Full (AP)
- High-Pass Crossover Frequency: 50 - 250 Hz
- Low-Pass Crossover Frequency: 50 - 250 Hz
- Signal-to-Noise Ratio: 100 dB
- Channel Separation: 50 dB
- Bass Boost: Selectable 0/+6dB/+12dB
- Bass/Gain Remote: No
- Fan Cooled: No
- Fuse Rating: 50A Fuse Recommended, Not Included
- Strappable: No
- CEA-2006 Compliant: Yes
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 28 reviews
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Product Reviews
★★★★★ 5
Perfect fit
Size: 8.26" x 5.63" x 2.24"
A little difficult to access but the University of YouTube helped with that. Filter fit perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 4
Easy replacement
Size: 8.26" x 5.63" x 2.24"
Reasonable price
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 8, 2025
★★★★★ 5
Kona Air Filter
Size: 9.33" x 6.29" x 2.08"
Very satisfied, it fit perfectly!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 31, 2026
★★★★★ 5
Engine air filters are important!
Size: 8.26" x 5.63" x 2.24"
Just like me and you breathing, your car performs better when it can breathe freely and cleanly.
My philosophy with an engine air filter is to replace with cheap and often. You can't control the quality of air coming into your system but you can control the filtering, so I'd rather replace the filter on an accelerated schedule with a cheap product than to invest into something more expensive and have it perform dirty for longer than it should.
For my Honda CRV 2024 Hybrid, this filter fits snuggly and performs well.
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Reviewed in the United States on December 1, 2025
★★★★★ 5
It’s the right part tor Acura integra
Size: 7.32" x 7.48" x 2.28"
Perfect fit easy to replace good quality !
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026