








"Fit perfectly and worked exactly as expected — support was excellent."
Rockford Fosgate Punch P400X4
Upgrade Your Vehicle With Confidence. This Is Built to Fit, Perform, and Last
Rockford Fosgate Punch P400X4: High-Performance 4-Channel Amplifier for Superior Sound Quality
The Rockford Fosgate Punch P400X4 is a high-performance 4-channel amplifier engineered to deliver crisp, powerful audio in your car sound system. With 400 watts of RMS power, this versatile amplifier is perfect for driving a set of speakers or a combination of speakers and a subwoofer, ensuring that every note is reproduced with clarity and precision. Whether you're upgrading your factory system or building a custom setup, the P400X4 provides the power and flexibility you need to elevate your listening experience.
Experience Powerful, Clean Audio with the Rockford Fosgate Punch P400X4
The Rockford Fosgate Punch P400X4 amplifier is designed to deliver powerful, clean audio that brings your music to life. With its high-efficiency Class AB design, this 4-channel amplifier ensures consistent power delivery, resulting in clear, distortion-free sound across all channels. Whether you're listening to your favorite tracks at low volumes or turning up the volume for a road trip, the P400X4 ensures that your car’s sound system performs at its best, providing balanced, full-range audio.
Versatile Performance for Various Audio Setups
The Rockford Fosgate Punch P400X4 offers versatile performance, making it suitable for a wide range of audio configurations. It can be used to power four full-range speakers with 50 watts RMS each, or you can bridge the channels to deliver 200 watts RMS to two speakers or a subwoofer. This flexibility allows you to tailor your car audio system to your preferences, whether you're aiming for balanced sound or looking to add extra punch to your bass.
Durable Construction for Long-Lasting Reliability
Built with durability in mind, the Rockford Fosgate Punch P400X4 features a rugged cast aluminum chassis that aids in heat dissipation and protects internal components. This robust construction ensures that the amplifier withstands the rigors of daily use while delivering reliable, high-quality performance. Additionally, the P400X4 includes onboard Punch EQ, allowing you to fine-tune the bass and treble to your liking, and a variable crossover to optimize sound quality for your specific setup.
Easy Integration and Installation
Designed for seamless integration, the Rockford Fosgate Punch P400X4 features both high-level and low-level inputs, making it compatible with a wide range of audio sources. Its compact size allows for flexible installation options within your vehicle. Moreover, the amplifier includes a remote Punch Level Control (PLC) input, enabling you to adjust the bass output directly from the driver's seat when paired with an optional remote control.
Key Features:
- 400-Watt 4-Channel Amplifier: Delivers 50 watts RMS per channel at 4 ohms, 100 watts RMS per channel at 2 ohms, or 200 watts RMS when bridged at 4 ohms.
- High-Efficiency Class AB Design: Ensures consistent power delivery for clear, distortion-free sound.
- Punch EQ with Bass and Treble Boost: Allows for customized sound adjustments.
- Variable Crossover: Optimizes sound quality for your specific audio setup.
- Durable Cast Aluminum Chassis: Provides heat dissipation and protects internal components.
- Compact Size: Allows for flexible installation in various vehicle types.
Why Choose the Rockford Fosgate Punch P400X4?
The Rockford Fosgate Punch P400X4 is the ideal choice for car audio enthusiasts seeking to enhance their sound system's performance. With its powerful output, versatile configuration options, and durable construction, this amplifier provides the quality and reliability needed to elevate your in-car listening experience. Whether you're powering full-range speakers or a combination of speakers and a subwoofer, the P400X4 delivers the crisp, powerful audio you desire.
Upgrade Your Car Audio with the Rockford Fosgate Punch P400X4
Ready to transform your car's audio system? Order the Rockford Fosgate Punch P400X4 4-channel amplifier today and enjoy superior sound quality on every journey.
Specifications:
| Specification | Details |
|---|---|
| Power Output (RMS) | 50 Watts x 4 Channels @ 4Ω 100 Watts x 4 Channels @ 2Ω 200 Watts x 2 Channels @ 4Ω (Bridged) |
| Frequency Response | 20 Hz – 20 kHz |
| Class | AB |
| Signal-to-Noise Ratio | >100 dB |
| Variable Crossover | 50 Hz – 250 Hz |
| Punch EQ | +0 to +18 dB @ 45 Hz and 12 kHz |
| Dimensions | 13.3" x 7.8" x 2.4" |
FAQs
Q: What is the power output of the Rockford Fosgate Punch P400X4 amplifier?
A: The P400X4 delivers 50 watts RMS per channel at 4 ohms, 100 watts RMS per channel at 2 ohms, and 200 watts RMS when bridged at 4 ohms.
Q: Can the P400X4 be used to power a subwoofer?
A: Yes, when bridged, the P400X4 can deliver 200 watts RMS to a subwoofer, making it suitable for driving moderate subwoofers.
Q: What type of amplifier is the P400X4?
A: The P400X4 is a Class AB 4-channel amplifier, designed for high efficiency and clear, powerful audio performance.
Q: Does the Rockford Fosgate Punch P400X4 have customizable sound controls?
A: Yes, the P400X4 includes a Punch EQ with bass and treble boost, as well as a variable crossover, allowing you to tailor the sound to your preferences.
Q: Is the P400X4 easy to install?
A: Yes, with both high-level and low-level inputs and a compact design, the P400X4 is designed for easy integration into various car audio setups.
Elevate Your Driving Experience with Superior Sound!
Don't miss the chance to upgrade your car's audio system with crisp, powerful sound. Order the Rockford Fosgate Punch P400X4 now and enjoy an exceptional audio experience on every drive.
- Ships within 1–3 business days from our warehouse
- Tracking included with every order
- Free 30-day returns if it doesn’t work for your setup
- 2-year manufacturer warranty
- Authorized dealer guarantee
- Real installer-backed support before and after purchase

Why This Upgrade Makes Daily Driving Better
Ease of Use & Safety
Expandable by Design
FITMENT & INSTALLATION MADE SIMPLE
WHAT VEHICLES IT WORKS WITH
We verify compatibility before you buy, no guesswork.
DIY FRIENDLY IF:
- You're comfortable with basic tools
- You follow provided instructions
PROFESSIONAL INSTALL RECOMMENDED IF:
- Your vehicle requires dash kits or wiring adapters
- You want a turnkey experience
INSTALLATION CREDIT & SUPPORT:
- $75 Installation Credit when purchased online
- Speak to real installers before you buy
- Bring it into one of our locations for install
Why Buying This Here Is Safer Than Anywhere Else
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Physical stores & real installers
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FREQUENTLY ASKED QUESTIONS
FREQUENTLY ASKED QUESTIONS
How do I know this stereo or speaker will fit my car?
Select your year, make, and model using the Vehicle Fit Guide at the top of the page. You’ll only see products that are compatible with your exact vehicle setup.
What happens if I order something that doesn’t fit?
You can return or exchange it within 30 days. We’ll help you identify the correct part for your vehicle so you don’t have to guess again.
Are these products brand new and covered by warranty?
Yes — all products are brand new, authentic, and sold as an authorized dealer, which means they include a full manufacturer warranty.
Can you install this for me, or do I need to do it myself?
You can do either. Install it yourself, or use your $75 installation credit at our shop and have it professionally installed by our team.
What if I don’t know what to choose for my car?
Tell us your vehicle and what you want to improve (sound, bass, CarPlay, etc.). We’ll recommend the exact products that fit your car and your budget.
