Punch 100 Watt Full-Range Element Ready Mono Amplifier (pair) PM100X1K

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Punch 100 Watt Full-Range Element Ready Mono Amplifier (pair) PM100X1K

The PM100X1 is a 100 Watt dynamic power mono amp using DC and AC voltages present on existing radio speaker outputs. This design allows connection to a speaker wire without running a B+ cable. It also presents a safe load to the radio amp circuit to eliminate excessive wear and tear on the radio, making it ideal for OEM and aftermarket radio integration. The conformal coated PCB and enclosure are IPX6 rated for the next level in Element Ready™ protection against water, dust and UV rays. 


The PM100X1K "KIT" ships with 2 pcs.

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The PM100X1 amplifier uses our patent pending BTL technology to provide you a very unique amplifier solution. This single channel amplifier utilizes the speaker output of the radio to not only provide the audio signal it needs, but also the power that runs the unit. This is done through a combination of the DC offset voltage commonly present and the audio AC signal itself.

Initially, it uses the DC offset voltage for its turn on power as well as primary amplification power. As volume is increased and the output power demand rises, the amplifier begins sharing the power load between the DC and AC signals. Once high volume is reached, the majority of the amplifier's power is provided from the AC signal only and is supplemented by its intenal storage bank.

This design allows it to actually charge its capacitive bank on the downside of the AC signal wave which is essentially unused power anyway. It also presents no more load to the radio than a standard 2 or 4 ohm speaker would thus keeping the radio amplifier circuit safe from low impedance conditions. This design allows the amplifier to be connected to a radio with a rated 20 watt output and produce up to 100 watts dynamically. The unit also features a 2/ 4 ohm input switch to match the amplifier to the output impedance rating of the radio circuit. For speaker protection, we incorporate and selectable high pass crossover with setting at 60, 80 and 100Hz.

In rare cases there is not enough DC voltage present to power the amp at turn on so an add on B+ wire is included and can be tied to other lower current circuits in its proximity. This design makes the amplifier ideal for OEM or aftermarket upgrades without having to use physically larger amplifiers as they can be hidden in the dash or doors of the vehicle. It is also IPX6 rated for those installs where moisture may be present.


  • Current Limited to Protect Head Unit for Both 4 Ohm and 2 Ohm Configurations
  • Uses Stored Energy from BTL Amplifier to Produce Dynamic Power of Over 100W
  • Patented BTL Powered "FreeLoad" Technology (US 9,438,181 B1)
  • Harvests both B+ and Audio Signal From Standard Head Unit Speaker Outputs
  • Extruded Aluminum Heat Sink
  • Pig Tail Connectivity for Easy Installation
  • Thermal Protection
  • Short Circuit & Over Voltage Protection
  • CEA-2006 Compliant & CE Compliant
  • Small Stealth Package that Allows for Anywhere Installation
  • 60, 80, and 100 Hz Selectable 12dB/Oct HP Butterworth Crossover
  • Selectable 4 and 2 Ohm Play
  • High Level Turn On
  • Optional B+ Connection for Non-Standard Speaker Outputs
  • Muted turn on
  • Sold in pairs (left/right)
  • Discrete surface mount technology
  • 2-Year Warranty
Element Ready™ | Amps

All components are protected against harsh outdoor elements like Dust, UV, Temperature, Water, Corrosion & Vibration.

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Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's ...

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IPX6 Water Intrusion Rating

Water projected in powerful jets from any direction shall have no harmful effects.

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A series of proprietary Rockford Fosgate technologies designed to deliver all the PUNCH, while consuming less ...

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Patented BTL powered "FreeLoad" technology is a small amplifier that does not require a B+/GND connection ...

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Cta-2006 Compliant
Number of Channels
Total Power
(Sum of Rated Power)
100 Watts
Rated Power
(RMS Continuous Power)
60 Watts x 1 @ 4-Ohm
100 Watts x 1 @ 2-Ohm
Dynamic Power
61 Watts x 1 @ 4-Ohm
109 Watts x 1 @ 2-Ohm
Frequency Response
60Hz to 20kHz +/- 1.0dB
Input Sensitivity
Circuit Topology Class
Efficiency (Average)
Total Harmonic Distortion (THD+Noise)
4-Ohm: <1.0%
2-Ohm: <1.0%
Signal Input
Signal Output
Tone Controls
Crossover Controls
Selectable 60Hz, 80Hz, 100Hz @ 12dB/octave Butterworth
Remote Controls
Visual Indicators
Power/Protect LED
Power Wire Gauge
Power Input Connector
Speaker Wire Gauge
Speaker Output Connector
Operating Voltage
9 - 16 VDC
Recommended Fuse
(Not Included)
Average Current Draw (13.8V Music)
Max. Current Draw (13.8V Sinewave)
Suggested Alternator
Included In The Box
Dimensions (H x W x D)
1.3 x 3 x 3.9 (in)
3.3 x 7.62 x 9.91 (cm)
Shipping Weight
2.8 Lbs. (1.27 Kg.)

Return Authorization

Contact the Authorized Rockford Fosgate Dealer you purchased this product from. If you need further assistance, call 1-800-669-9899 for Rockford Customer Service. You must obtain an RA# (Return Authorization number) to return any product to Rockford Fosgate. You are responsible for shipment of product to Rockford.


In short... amazing

Used this amp to add power to a Bose system in a 2016 MX5. Not possible to remove Bose amp and transplate better amp in current generation of MX5. These amps are amazing. Small, lightweight, marine quality allows them to be mounted next to the speakers in doors. Build sheet said 74 watts into 4 ohms and 117 watts into 2 ohms. Easy, painless install. Allows me to put in better speakers to make the sound system really sing. Best advance in amplifiers to come along since compact class D amps. If you have a sound system that is difficult to modify, use these. Best improvement to a stock sound system, especially a Bose one which is hard to modify.


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