Name: Rockford Fosgate® Prime 300 Watt 4-Channel Amplifier
Brand: Rockford Fosgate
SKU: 87029
Availability: OutOfStock

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Hi-Fi Systems

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Versatile

The PRIME R300X4 is a versatile 4-channel amplifier capable of running your entire system. The R300X4 is great for full-range or component speakers on the front channels with subwoofers on the rear running in bridged/mono mode.

Rockford Fosgate® Prime 300 Watt 4-Channel Amplifier-R300X4

Rockford Fosgate® Prime 300 Watt 4-Channel Amplifier

Rockford Fosgate amplification at an unbelievable value. The R300X4 4-channel amplifier is so versatile, it will be the only amplifier your system needs. Full-range or component speakers on the front channels and a single R1S410 10" or R1S412 12" woofer bridged/mono on the rear. Consider your system clean, loud and done! Check out our RFTECH:Woofer WiringWizard to get the most out of your amplifier.

Real time output and power supply thermal sensing

The KTP-445U Universal Power Pack amplifies both an aftermarket or factory installed head unit power output, resulting up to a 150 percent power increase over the original power from the head unit's built-in amplifier.

Alpine® 4 Channel Universal Power Pack Amplifier-KTP-445U

Alpine® 4 Channel Universal Power Pack Amplifier

Add higher output and more dynamic response with this easy-to-install Universal Power Pack upgrade.

For aftermarket and factory installed systems

Compact size lets the KTP-445U fit where most amplifiers won’t. The KTP-445U comes equipped with the RCA and Auto-Sensing-Speaker level connectors and it fits behind the head unit in the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. The size and flexible wires make the Power Pack an easy choice to save space.

Independent Filters For Rear and Front Inputs

High-Pass selectable switches for Front & Rear allow frequency filtering for a wide variety of speakers. Choose from full range to selectable range: 60Hz, 80Hz or 120Hz to fine-tune your crossover points.

Need configurable options for Speaker-Level or RCA inputs to the Power Pack? On the bottom panel of the Power Pack there are selectable input options to accommodate Speaker-Level (0.5V-10V) or RCA (0.2V – 4V) inputs. Selectable 2 Channel and 4 Channel options give you the control to determine source inputs, and can eliminate the need for Y-adapters.

The Power Pack provides simple variable gain controls on the end panel for flexibility and a wide variety of system applications.

Best Signal-To-Noise Contender In Its Class

In order to ensure that Alpine sound quality is heard at your ears, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Total Harmonic Distortion (THD+N) Vs. Frequency

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - < 0.03% THD+N @ 1W, 1% THD+N @ rated power.

The MRV-F300 uses a technology called Enhanced Shutdown Performance, which rolls back the output a bit when the amp threatens to overheat from playing at its limits too long. Instead of shutting down completely, it continues playing your music, until it c

Alpine® 4 Channel V-Power Digital Amplifier-MRV-F300

Alpine® 4 Channel V-Power Digital Amplifier

High- and low-pass filters put you in command of the frequencies that reach your speakers, while a bass boost lets you apply some extra low-end punch. The amp includes preamp- and speaker-level inputs, so you can install it in almost any vehicle, even one with a factory radio. If you're using the speaker-level inputs, the amp senses an incoming signal and turns itself on, eliminating the need to run a turn-on wire back to your vehicle's receiver or fusebox. If you're a tweaker, you'll appreciate the end-piece terminal covers that can be snapped in and out without the need for any tools.

50 Watts RMS x 4 at 4 ohms (75 watts RMS x 4 at 2 ohms)

150 Watts RMS x 2 bridged output at 4 ohms (4-ohm stable in bridged mode)

Variable high- and low-pass filters (50-400 Hz, 12 dB/octave)

Selectable bass boost (+12 dB at 50 Hz) on channels 3 & 4

Remote Sensing automatic turn-on when using speaker-level inputs

8-Gauge power and ground leads recommended — wiring and hardware not included with amplifier

The MRV-F300 uses a technology called Enhanced Shutdown Performance, which rolls back the output a bit when the amp threatens to overheat from playing at its limits too long. Instead of shutting down completely, it continues playing your music, until it cools enough to return to full power.

The KTP-445A Power Pack amplifies power output on select 2005 and newer Alpine head units, resulting in up to a 150 percent power increase over the original power from the head unit's built-in amplifier.

Alpine® 4-Channel Power Pack Amplifier-KTP-445A

Alpine® 4-Channel Power Pack Amplifier

Add higher output and a more dynamic response with this easy-to-install Alpine head unit Power Pack upgrade.

For select 2005 and newer Alpine head units

Compact size lets the KTP-445A fit where most amplifiers won’t. The KTP-445A comes equipped with direct plug-in connectors for select 2005 and newer Alpine head units and it fits behind the dash of most vehicles. It's small and compact at only 7-7/16” x 1-1/2” x 2-1/2”. Its size and flexible wires make the Power Pack an easy choice to save space.

In order to ensure that Alpine sound quality is heard, we’ve created a platform that offers an unbelievably low noise floor, taking extra care to ensure a clean signal path, with no extraneous interference. The end result: The Power Pack boasts 1 Watt Signal-to-Noise Ratio of 82dB or better.

Total Harmonic Distortion (THD+N) vs. Frequency

Uniquely, the Power Pack distortion actually decreases at higher frequencies, resulting in a clean and clear signal where your ear is most sensitive to distortion. - <0.03% THD+N @ 1W, 1% THD+N @ rated power.

The Power T400-4 is a 4-channel amplifier capable of producing 100 Watts into each of its four channels at 2-Ohms. The T400-4 can run a 4-way full-range system or use component speakers on the front with subwoofers on the rear.

Rockford Fosgate® Power 400 Watt 4-Channel Amplifier-T400-4

Rockford Fosgate® Power 400 Watt 4-Channel Amplifier

The T400-4 amplifier is perfect for front/rear fading stereo systems or when dedicated amplification is required between front stage speakers and rear subwoofer(s). Thanks to the Dynamic Thermal Management, the small chassis design insures it can be installed in any location – like under front seats.

The Prime R250X4 is a 250 watt 4-channel amplifier capable of running 2-Ohms stereo on all channels and 4-Ohms bridged/mono on the rear channels. Includes on-board Punch Bass and front/rear crossover controls.

Rockford Fosgate® Prime 250 Watt 4-Channel Amplifier-R250X4

Rockford Fosgate® Prime 250 Watt 4-Channel Amplifier

The Prime R250X4 is a 4-Channel amplifier perfect for any Car Audio Fanatic getting into mobile audio wanting a single amplifier to run a complete audio system. This amplifier features selectable Punch Bass to tune low frequencies, variable crossovers to either protect your high frequency speakers or feeding only bass to your subwoofers.

Rockford Fosgate® Prime 400 Watt Full-Range Class-D 4-Channel Amplifier-R400-4D

Rockford Fosgate® Prime 400 Watt Full-Range Class-D 4-Channel Amplifier

The Prime R400-4D amplifier offers high efficiency through the implementation of its Class-D circuitry while being able to power a full-range system. This amplifier is optimized for 4-channel front/rear systems so you can run midrange/tweeters in the front doors/dash while running midrange/tweeters in the rear doors/deck. Match with a mono amplifier for subwoofers and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy.

Tri-stage protection covers thermal, over-current and short circuits

On-board Punch EQ with +18dB boost @ 45Hz

The PRIME R400-4D is an ultra-efficient 4-channel amplifier producing 100 Watts into four channels at 2-Ohms. Run a 4-way full-range system or use it with components on the front channels with subwoofers on the rear.

The PRIME R600-4D is an ultra-efficient 4-channel amplifier producing 150 Watts into four channels at 2-Ohms. Run a 4-way full-range system or use it with components on the front channels with subwoofers on the rear.

Rockford Fosgate® Prime 600 Watt Full-Range Class-D 4-Channel Amplifier-R600-4D

Rockford Fosgate® Prime 600 Watt Full-Range Class-D 4-Channel Amplifier

The Prime R600-4D amplifier offers high efficiency through the implementation of its Class-D circuitry while being able to power a full-range system. This amplifier is optimized for 4-channel front/rear systems so you can run midrange/tweeters in the front doors/dash while running midrange/tweeters in the rear doors/deck. Match with a mono amplifier for subwoofers and you'll have a Rockford Fosgate system that any Car Audio Fanatic will envy.

Tri-stage protection covers thermal, over-current and short circuits.

The Punch PBR300X4 is a 300 Watt full-range amp designed for compact systems. This efficient 4-channel amp packs a Punch in motorcycles, ATVs and hybrid-electric vehicles without sucking a lot of juice from your electrical system.

Rockford Fosgate® Punch 300 Watt BRT Full-Range 4-Channel Amplifier-PBR300X4

Rockford Fosgate® Punch 300 Watt BRT Full-Range 4-Channel Amplifier

The Rockford PBR300X4 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 300 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.

Variable 4-6 volt hi level DC offset voltage input turn-on control

The Punch P400X4 is a 4-channel amplifier producing 100 Watts into all four channels at 2-Ohm. The P400X4 is perfect for a 4-way full-range system or a 3-way system having a front stage with subwoofers on the rear channels.

Rockford Fosgate® Punch 400 Watt 4-Channel Amplifier-P400X4

Rockford Fosgate® Punch 400 Watt 4-Channel Amplifier

The P400X4 is perfect for 4-way front-stage/rear-fill or 3-way front-stage/subwoofer systems. Simply drop a pair of component speakers on the front channels and subs on the rear and BOOM - you got "The PUNCH." With its flexible design, the P400X4 is an excellent amplifier choice for virtually any vehicle.

High level input capable with Auto Turn-On circuit

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Color	Black
Depth (in.)	13.19
Width (in.)	6.77
Height (in.)	1.98
Amplifier Class	Class AB
Bluetooth Capable	No
Amplifier Channels	4
Impedance	4 Ohms
Manufacturer Warranty	1 Year
Water Resistant	No
Digital Input	No
Shallow Mount	No
Speaker Level Input	No
Product Weight (lbs.)	7.8

Rockford Fosgate® Prime 300 Watt 4-Channel Amplifier

Model #: R300X4

At a Glance

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