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Description
Rockford Fosgate PBR400X4D - 4 Channel AmplifierThe Rockford PBR400X4D is a full range 4 channel amplifier designed for stereo front rear systems that requires little space. The BRT (Boosted Rail Technology) is an ultra efficient design that generates 400 Watts of power! The BRT also has a variable hi level DC offset turn on circuit for easy installation into any OEM system. Great for motorcycles and recreational vehicles. Full Range Class D Differential inputs with high level auto turn on feature
The Rockford PBR400X4D is a full-range 4-channel amplifier designed for stereo front/rear systems that requires little space. The BRT (Boosted Rail Technology) is an ultra efficient design that generates 400 Watts of power! The BRT also has a variable hi-level DC offset turn-on circuit for easy installation into any OEM system. Great for motorcycles and recreational vehicles.
- Full Range Class D
- Differential inputs with high level auto turn-on feature
- 8 AWG power/ground connector
- Remote-Out feature when using high level inputs
- C.L.E.A.N. input/output clip detection and indicator LEDs
- Real time output and power supply thermal sensing
- Extruded aluminum heatsink
- Selectable Fixed 12dB/Octave Butterworth Crossovers
- Muted turn on
- Rockford Fosgate proprietary protection
- Discrete surface mount technology
- Compact design for stealth installations
- CEA-2006 and CE compliant
- 1 Year Warranty
- 2006 Guidelines CEA-2006
- Power Rating 50W x 4 @ 4Ω ≤1.0% THD+N
- Number of Channels 4
- Total Power (Sum of Rated Power) 400 Watts
- Rated Power (RMS Continuous Power)
- 50 Watts x 4 @ 4-Ohm
- 100 Watts x 4 @ 2-Ohm
- 200 Watts x 2 @ 4-Ohm Bridged
- Dynamic Power (PVC/PowerCube®)
- 75 Watts x 4 @ 4-Ohm
- 130 Watts x 4 @ 2-Ohm
- 270 Watts x 2 @ 4-Ohm Bridged
- Bridgeable
- Frequency Response 20Hz - 20kHz +/- 1dB
- Input Sensitivity 150 mV to 12 V
- Circuit Topology Class Class D
- Efficiency (average) > 75%
- Total Harmonic Distortion (THD+Noise) 4-Ohm < 1.0 / 2-Ohm < 1.0
- Signal Input
- Input Switch: 2ch/4ch input switch
- Hi-Level: Variable DC offset sensitivity
- High-Level: Harness Low-Level: 2 Pair RCA
- Crossover Controls
- High-Pass: 60Hz or 80Hz @ 12dB/Octave
- Low-Pass: 80Hz @ 12dB/Octave
- Visual Indicators
- Power: Blue
- Protect: Red
- Input Clip: Red
- Output Clip: Blue/Violet/Red
- LED Color Legend
- BLUE: <0.5% TDH
- VIOLET: 1% THD
- RED: ≥10% THD
- Power Wire Gauge 8 AWG
- Power Input Connector Detachable Compression Terminal
- Speaker Wire Gauge 16 AWG
- Speaker Output Connector
- Front: 4-Pin Harness
- Rear: 4-Pin Harness
- Cooling Convection Heatsink Extruded Aluminum
- Operating Voltage 9 - 16 VDC
- Recommended Fuse (not included) 60 A
- Average Current Draw (13.8V Music) 27 A
- Max. Current Draw (13.8V Sinewave) 50 A
- Suggested Alternator 75 A
- Dimensional Diagram
- Dimensions (H x W x D)
- 1.53 x 4.25 x 6.75 (in)
- 3.9 x 10.79 x 17.16 (cm)
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
4.0 ★★★★★
Based on 1002 reviews
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Product Reviews
★★★★★ 4
Great Frother - almost too powerful
Color: Black, Size: Rechargeable
I’ve been using the Tyohur InstaWhisk milk frother for a while now, and overall I really like it—but I wouldn’t quite give it 5 stars, and honestly it’s because it might be a little too powerful for its own good.
First, the positives: this frother does an amazing job. The single-button control is super easy to use, and I love that you can adjust the speed just by how much pressure you apply. It feels very intuitive, and you can really dial in the exact texture you want. Whether I’m making a latte or mixing something thicker like a protein drink, it handles everything smoothly.
The performance is seriously impressive. On the lower speeds, it creates nice, silky foam, and when you turn it up, it’s incredibly fast—like café-quality foam in seconds. High-speed frothers like this are designed to create rich foam very quickly, and this one definitely delivers on that promise
That said, the power is also what knocks it down a star for me. If you’re not careful (especially when using higher speeds), it can splash pretty easily. The product description says it’s designed to prevent mess with stable low-RPM operation, and that’s true if you stay on the lower settings—but once you ramp it up, you really need to keep the whisk fully submerged or start slow, or it can send milk flying out of the container
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Reviewed in the United States on May 23, 2026
★★★★★ 5
Great frother and well built
Color: Black, Size: Rechargeable
I don’t usually write reviews, but since I’ve been helped by so many reviews from others, I wanted to share my thoughts on the InstaWhisk Milk Frother.
This is a great frother. It really whips cream into a tasty, rich froth. My wife and I have tried cheaper battery-operated frothers in the past, and while they worked fine at first, they didn’t last very long. The InstaWhisk feels well built and works great.
Pro tip: The frother may be a little too powerful at normal speed, so you might need to lightly “feather” the power button to keep the liquid from overflowing the cup. Once you get used to it, it works really well.
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Reviewed in the United States on June 6, 2026
★★★★★ 5
Great frother/stirrer especially for the price.
Color: Black, Size: Rechargeable
Best one available. Have used cheap ones from the store that work pretty good, but batteries are a pain. This is rechargeable and it has a push button that allows you to start it right away without having to turn it on to start it kind of like a power drill. If you start to press it it goes slow the harder you press the faster it goes. The different attachments are great. We use it for both coffee frothing as well as mixing up electrolyte drinks with water with the included mixing attachment. Crazy powerful and easy to use.
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Reviewed in the United States on May 9, 2026
★★★★★ 5
Strong motor. Works great
Color: Black, Size: Rechargeable
I really like this frother. The fact that it’s variable speed, rechargeable, and can spin at a high rate are all great features.
I use it to blend collagen powder and cream into my coffee every morning. Also sometimes use it to
Blend drinks. Strong motor.
Like that the whisks are removable for cleaning and that it comes with different ones.
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Reviewed in the United States on April 9, 2026
★★★★★ 4
Works well, long use on single charge, high torque - be careful when starting
Color: Black, Size: Rechargeable
Not the most inexpensive powered whisker bur I've used other Typhor products and found them reliable for the task designed. I fell they don't cheap out on the rechargeable battery so I don't fell they will catch fire, as we are hearing about from other cheaper rechargeable items. I liked 2 things about this model the speed control is by a pressure single switch which I can control, not just pick speed 1,2,3. The swappable tips allow for different uses. I don't drink coffee but use the item to whisk eggs for an omelets and it has the torque to mix them without effort. In Fact need to only use half power else it will splatter out of my mixing vessel.
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Reviewed in the United States on June 7, 2026