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Rockford Fosgate Punch PBR300X1

Compact mono subwoofer amplifier — 300 watts RMS x 1 at 1 ohm

Item # 575PBR3001

You won't believe how small and powerful this amp is.

You won't believe how small and powerful this amp is.

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Discontinued item
3 questions - 3 answers

Item # 575PBR3001

Leia
Need help?
Contact our Virginia-based experts.

About the Rockford Fosgate Punch PBR300X1

You won't believe how small and powerful this amp is. Rockford Fosgate's PBR300X1 mono amp can drive up to 300 watts RMS into a one-ohm load, allowing you to power multiple subs to get more bass. And this Punch Class BR amplifier generates this power from a very tiny case — literally the size of your hand. Boosted Rail (BR) amp technology uses capacitors and high-speed circuitry to boost the amp's power supply voltage, when needed, so it can handle massive musical peaks without missing a beat. Rockford Fosgate uses this new technology to create a remarkable amp that fits almost anywhere and delivers powerful sound.

You won't believe how small and powerful this amp is. Rockford Fosgate's PBR300X1 mono amp can drive up to 300 watts RMS into a one-ohm load, allowing you to power multiple subs to get more bass. And this Punch Class BR amplifier generates this power from a very tiny case — literally the size of your hand. Boosted Rail (BR) amp technology uses capacitors and high-speed circuitry to boost the amp's power supply voltage, when needed, so it can handle massive musical peaks without missing a beat. Rockford Fosgate uses this new technology to create a remarkable amp that fits almost anywhere and delivers powerful sound.

Convenience and reliability
Add Rockford Fosgate's famous Punch EQ remote bass boost, and you'll be able to control the subwoofer impact from your front seat. The amp also features speaker-level inputs with signal-sensing turn-on, allowing you to connect into almost any system without having to run a turn-on lead back to the receiver. An extruded aluminum heat sink combines with Rockford Fosgate's heat management technology to make sure your tunes keep rockin' — even when you're playing loud.

Confused about impedance? Check out our article on matching subs and amps.

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Product highlights:

  • mono subwoofer amplifier
  • 75 watts RMS x 1 at 4 ohms (150 watts RMS x 1 at 2 ohms)
  • 300 watts RMS x 1 at 1 ohm
  • CEA-2006 compliant
  • suitable for powersports application
  • Boosted Rail amp technology
  • Dynamic Thermal Management cooling system
  • variable low-pass filter (35-250 Hz, 12 dB/octave)
  • differential-balanced inputs eliminate noise from your vehicle's electrical system
  • preamp and speaker-level inputs
  • optional wired remote bass boost (0-18 dB at 45 Hz)
  • 10-gauge power and ground leads and a 30-amp fuse recommended — wiring and hardware not included with amplifier
  • no onboard fuses — when installing multiple amps in a system, an additional 30-amp in-line fuse between the distribution block and the amplifier is recommended
  • 6-15/16"W x 1-9/16"H x 4-5/16"D
  • warranty: 1 year (extends to 2 years when purchased and used with Rockford Fosgate's RFK10 or RFK10i amp wiring kit)
  • Our 60-day money-back guarantee
  • MFR # PBR300X1

What's in the box:

  • Mono amplifier
  • 6" Speaker output harness (Molex plug on one end and tinned bare wire on the other)
  • 12" Input harness (Molex plug on one end and female stereo RCA jacks on the other)
  • Installation & Operation manual (English/ French/ Spanish/ German/ Italian)
  • Amplifier Performance Verification Certificate

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Features
Controls
Connections

Features

Boosted Rail Technology: The PBR300x1 uses Boosted Rail Technology (BRT), an efficient design that doesn't use a switching power supply. The PBR300x1's average efficiency is more than 75%, meaning it doesn't generate much heat and can maintain a small footprint.

Power Output: The power output increases as impedance is reduced:

  • 4Ω: 75 watts RMS
  • 2Ω: 150 watts RMS
  • 1Ω: 300 watts RMS

Signal Input: The PBR300x1 is compatible with either line-level (RCA) or speaker-level inputs. The included Molex-to-RCA is used in both cases; the RCA end is cut off for connection to speaker wires.

Auto Turn-on: When using speaker-level inputs the amp will automatically turn on when it senses an input signal (4 volt minimum). The threshold voltage (DC offset) for auto turn-on is adjustable from 4 volts to 6 volts. This circuit is only active when the Input Level switch is set to High (speaker-level).

Dynamic Thermal Management (DTM): DTM Evenly distributes excess heat across the entire extruded aluminum heatsink.

MEHSA³: MEHSA³ (Maximum Efficiency Heat Sink Application-Third Generation) is a Rockford Fosgate proprietary process that increases the heat transfer from the MOSFET devices to the heatsink. The multi-layer insulated metal MEHSA substrate operates with minimal thermal resistance, spreading heat both downward and outward to quickly dissipate heat from each device across the heatsink. This allows greater power output, enhanced thermal stability, and maximum reliability.

NOMAD: NOMAD (NOn-Multiplying Advanced Decision) is an intelligent protection circuit that uses an analog computer to make real time decisions regarding temperature, voltage, current and impedance. The unit is protected without limiting sound output unless needed.

DSM (Discrete Surface Mount): In the manufacturing process high speed robotics are used to place 1% tolerance parts and large board traces. DSM improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature.

LEDs: The Power/Protect LED on the right side of the amp illuminates blue when the amp is turned on and operating normally; it illuminates red when one of the protection circuits has engaged (short circuit, impedance too low, or temperature too high). The BRT LED on the left side of the amp illuminates white when the boost mode is engaged.

Controls

Crossover: The amplifier's internal low-pass crossover is continuously variable from 35 Hz to 250 Hz; the slope is 12 dB/octave.

Gain: When using line-level inputs, the input gain is adjustable from 150mV to 4V, when using speaker-level inputs it's adjustable from 400mV to 11V.

Input Level: Use the 2-position switch to select the input voltage range; High (speaker-level) or Low (line-level).

DC Offset: The DC offset threshold voltage for the auto turn-on circuit is adjustable from 4 volts to 6 volts (feature only active when the Input Level switch is set to High).

Connections

Power Connections: The power, ground, and remote turn-on terminals are c-clamps on a removable plug. Each terminal will accommodate up to 10-gauge wire (Rockford recommends 10-gauge minimum for the power and ground wires). A flat blade screwdriver (not supplied) is required to tighten/loosen the terminals. There is no fuse on the body of the amp, so an external 30-amp fuse (not included) must be installed in the power wire. If a wiring kit is used that includes a different value fuse, the original should be replaced with a 30-amp fuse.

Signal Input: The included input harness has a Molex plug on one end (plugs into the amp) and female RCA plugs on the other. When using speaker-level inputs the RCA end is removed and the four individual wires are used.

Speaker Output: The included speaker output harness has a Molex plug on one end (plugs into the amp) and tinned bare wires on the other.

Remote Punch EQ (PEQ): An RJ-45 jack is provided for connecting an optional remote PEQ control (575ROCKPEQ, sold separately). When connected the PEQ acts as a variable bass boost; 0-18 dB centered at 45 Hz.

Note: Older model (prior to 2007) Punch Bass and Para-Punch remotes will not work with this amp.

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Very good amp for money and it paired with my sub. [ Mitch  Mar 29, 2016 ]
A
compact size [ NORMAN  Mar 27, 2016 ]

3 questions already asked

Q
At what frequency do I set my low pass filter and high pass filter, respectively, for my mono amplifier(RF PBR300-1) and 4 channel(Pioneer) amplifier? My subwoofer(RF 12 Punch shallow) is rated 34-250hz, my mid(RF pps4-6) is rated 85-5000hz. Mono amp has 12dB/oct low pass from 35-250hz. The 4 channel amp has 12dB/oct high pass from 40-500hz. I have them set at around 125hz right now, wondering if that is the right way to do it.
[ Gregory  Sep 14, 2015 ]
1 answer
A
If you purchased the product from Crutchfield, feel free to contact our Tech Support team. They can walk you through the settings on the product and see if there may be a fix. Our toll-free Tech Support number is printed on your invoice, and is also available under the "My Orders" tab in the "My Account" section of our website. If you did not purchase the unit from Crutchfield, then you may want to contact the manufacturer. You can also post your question in our forums: http://community.crutchfield.com. Or try our online support center: http://crutchfield.custhelp.com/app/answers/list/kw/.
[ Krissy  Sep 18, 2015 ]  Staff
Q
can any one recommend me which subwoofers are best for this model?
[ Mamta  Dec 14, 2013 ]
1 answer
A
For subwoofer recommendations you may want to contact an Advisor. They will be able to help find subs that will match your amp and your budget.
[ Jeff  Dec 16, 2013 ]  Staff

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