• Four-channel, 4-ohm (only) amplifier with 75 Watts x 4 @ 4-Ohms RMS power rating and 300 watts RMS total power.
• Designed for stereo front/rear systems that require little space--just 1.53 x 4.25 x 6.75 inches.
• High- and low-level inputs with variable 4-6 volt hi level DC offset voltage input turn-on control.
• Selectable 80Hz LP/AP/80Hz HP filter @ 12dB/Octave.
• One-year limited warranty.

The PBR300X4 is a full-range 4-channel amplifier designed for stereo front/rear systems that requires little space. Rockford's Boosted Rail Technology provides an ultra efficient-design generating 300 Watts of power, and the amplifier also boasts a variable hi-level DC offset turn-on circuit for easy installation into any OEM system. Great for motorcycles and recreational vehicles. Rockford Fosgate Punch Series Amplification ------------------------------------------- For over 25 years, Punch amplifiers have set the standard in the car audio amplifier industry and they continue to do so today. It's the reason that they have become the most popular amplifiers in the world. Each of the Punch family amplifiers reproduce sonic perfection along with impressive power in a compact chassis. Rockford Fosgate PBR300X4 A full-range 4-channel amplifier designed for stereo front/rear systems that requires little space. 300 Watts in an Ultra-Compact Amplifier --------------------------------------- CEA-2006 -------- Power ratings on Rockford Fosgate amplifiers conform to CEA-2006 industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, not inflated marketing ratings. Discrete Surface ---------------------- DSM--An industry-leading manufacturing process, DSM utilizes high-speed robotics, high-quality 1% tight-tolerance parts and large board traces. The discrete components are laser etched to meet a particular value and a very low tolerance. This lower tolerance improves the efficiency of the circuit, decreases cross-talk from other discrete components and lowers operating temperature. These superior components are used by aerospace, automotive, and cellular manufacturers. Dynamic Thermal Management -------------------------- Heat is often inefficiently dissipated across a heatsink causing "hot spots". This impacts important design goals, which are: * Keeping internal components cool. * Maximizing potential of all components. * Reducing distortion for better sound quality. * Increasing efficiency to produce more power. Rockford Fosgate engineers have developed an award winning cooling design called DTM. This patent pending design seamlessly manages the output of power supply temperatures, while evenly distributing the excess heat across the entire amplifier. MEHSA3 ------ MEHSA3 (Maximum Efficiency Heat Sink Application--gen. 3) is a proprietary process that yields up to five times better heat transfer than traditional FET ing techniques, using the exact same components. A multi-layer insulated metal substrate operating with minimal thermal resistance spreads heat both downward & outward to quickly dissipate heat from each device across the heatsink. This process combined with our optimized heatsink designs, DSM (Discrete Surface ) technology and MOSFET devices, allows Rockford Fosgate to squeeze more watts per cubic inch from every output device as well as provide consistent thermal stability. The 3rd generation creates a dielectric layer between the ceramic topside and the aluminum base that retains all of the electrical isolation and capacitive coupling of the original MEHSA material increasing it's thermal conductivity. The higher power handling results in a 20% reduction in thermal impedance. Rockford Fosgate PBR300X4 Discrete surface componenents for ultra-efficient operation and lower operating temperatures. NOMAD ----- NOMAD is a "real time" analog computer that protects your amplifier from shorting speaker wires and dangerously low speaker impedances. Punch EQ2 --------- In the early 70's, Jim Fosgate studied the acoustical properties of automobiles. Utilizing a real-time analyzer and pink noise, he would graph out the acoustical characteristics of each car he tested. Jim discovered three problems that were common to all cars: * A midbass hump between 100-275Hz * A steep roll-off of high frequencies from 2kHz up to 20kHz * Reduced bass response below 50Hz The Punch EQ on-board equalization circuit helps correct for these acoustical deficiencies in the listening environment. When set to Low-Pass(LP) operation, it becomes a variable Bass Boost. When set to High-Pass (HP) operation, it acts as a variable Mid-Bass and Treble Boost. When set to All Pass (AP) operation, both Bass and Treble frequencies are boosted. About Rockford Fosgate ---------------------- Setting the standard for excellence in the audio industry, the Rockford Corporation markets and distributes high-performance audio systems for the mobile audio aftermarket and OEM market. Headquartered in Tempe, Ariz., Rockford Corporation is a publicly traded company and manufactures its products under four brands: Rockford Fosgate, Rockford Acoustic Design, Lightning Audio and InstallEdge.com. PBR300X4 Specifications ----------------------- Number of Channels: 4 Rated Power: 75 Watts x 4 @ 4-Ohms Total Power: 300 Watts Dynamic Power: 300 Watts @ 0 degrees RES Bridgeable: No Crossover Controls: Selectable 80Hz LP/AP/80Hz HP @ 12dB/Octave Signal Input: Hi-Level: Variable DC offset sensitivity High-Level: harness Low-Level: 2 Pair RCA Power Input Connector: Block Harness Power Wire Gauge: 10 AWG Speaker Output Connector: 4-Pin Harness Speaker Wire Gauge: Harness 16 AWG Heat Sink Type: Extruded aluminum Cooling: Convection Visual Indicators: Power, Protect, Boost Circuit Topology Class: Class BR Frequency Response: 20Hz - 20kHz +/-1dB Dimensions (HxWxL): 1.53" x 4.25" x 6.75" (3.90cm x 10.8cm x 17.2cm) What's in the Box ----------------- Rockford Fosgate PBR300X4 Amplifier, Speaker Output Harness, Input Harness, Documentation