Rockford Acoustic Design, Rockford Corporation is a publicly traded company and manufactures its products under four brands: . BRT (Boost) ， Circuit Topology Class:：Class BR ， Frequency Response:：20Hz - 250Hz +/-3dB ， Dimensions (HxWxL):：.53" x 4.25" x 6.75"。 (3.90cm x 0.8cm x 7.2cm) ， What's in the Box PBR300X Amplifier, 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, Rockford Fosgate PBR300X1 Punch 300 Watt Mono Boosted Rail Amplifier: Car Electronics. MOSFET output stage 。 12dB/octave Butterworth crossover 。 High level inputs 。 Mono amplifier with 300W x 1 @ 1-Ohm RMS power rating (150 Watts x 1 @ 2-Ohms, 75 Watts x 1 @ 4-Ohms) 。 Designed for a subwoofer system that requires 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 。 35Hz - 250Hz low-pass crossover with 12dB/octave Butterworth slope 。 One-year limited warranty 。 Product Description Rockford PUNCH BOOSTED ULTRA COMPACT 300W MO 。 Amazon.com The PBR300X is a mono amplifier designed for a subwoofer system that requires little space. Rockford's Boosted Rail Technology offers an ultra efficient design that doesn't need a switching power supply to generate its 300 Watts of power. automotive, 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. 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 00-275Hz。 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. Lightning Audio and InstallEdge.com.。 。 PBR300X Specifications Number of Channels:： ， Rated Power:：75 Watts x @ 4-Ohms。 50 Watts x @ 2-Ohms。 300 Watts x @ -Ohm ， Total Power:：300 Watts ， Dynamic Power:：300 Watts @ 0 degrees RES。 ， Bridgeable:：No ， Efficiency (average):：>7 @ 4/2/-Ohm ， Crossover Controls:：35Hz - 250Hz Low Pass @ 2dB/Octave Butterworth ， Tone Controls:：n/a ， Signal Input:：High/Low Input Switch。 High/Low Level Input: 4-Pin harness。 Hi-Level Sensitivity: Variable DC offset sensitivity ， Signal Output:：n/a ， Power Input Connector:：Block Harness ， Power Wire Gauge:：0 AWG ， Speaker Output Connector:：4-Pin Harness ， Speaker Wire Gauge:：Harness 2 AWG ， Heat Sink Type:：Extruded aluminum ， Cooling:：Convection ， Remote Controls:：Optional PEQ provides 0dB to +8dB @ 45Hz ， Visual Indicators:：Power/Protect, Speaker Output Harness, Input Harness, high-quality % 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. not inflated marketing ratings.。 Discrete Surface Mount DSM--An industry-leading manufacturing process. Ariz., both Bass and Treble frequencies are boosted.。 About Setting the standard for excellence in the audio industry, allows 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.。 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, Documentation。 。 。 。 。, 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.。 ， 。 A mono amplifier designed for a subwoofer system that requires little space, which are:。 Keeping internal components cool.。 Maximizing potential of all components.。 Reducing distortion for better sound quality.。 Increasing efficiency to produce more power.。 engineers have developed an award winning cooling design called DTM. This patent pending design seamlessly manages the output of power supply temperatures. the Rockford Corporation markets and distributes high-performance audio systems for the mobile audio aftermarket and OEM market. Headquartered in Tempe. decreases cross-talk from other discrete components and lowers operating temperature. These superior components are used by aerospace. DSM (Discrete Surface Mount) technology and MOSFET devices, and cellular manufacturers.。 Dynamic Thermal Management Heat is often inefficiently dissipated across a heatsink causing "hot spots". This impacts important design goals. DSM utilizes high-speed robotics, and features a variable hi-level DC offset turn-on circuit for easy installation into any OEM system. Great for motorcycles and recreational vehicles.。 ： Punch Series Amplification For over 25 years. delivering 300 watts of MOSFET power. 。 。 300 Watts in an Ultra-Compact Amplifier CEA- Power ratings on amplifiers conform to CEA- industry standards. These guidelines mean your amplifier's output power ratings are REAL POWER numbers, while evenly distributing the excess heat across the entire amplifier.。 Switchable high- and low-level inputs with variable DC offset sensitivity. 。 。 4-Pin Harness speaker connectors; variable 4-6 volt hi level DC offset voltage input turn-on control. 。 。 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 mounting techniques.
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