Overview: With its super efficient Class-BD circuit
topology, the Rockford Fosgate P500-1BD assures maximum power output. Due to
its dedicated low frequency response, this amplifier is optimized for mid-bass
speakers or subwoofers only. The amplifier is 1-ohm stable (500 watts x 1) and will drive a pair
of 4-ohm DVC subwoofers or quad-configuration of 2-ohm DVC subwoofers with ease.
Class bd Design: Rockford Fosgate bd topology is a
revolutionary patented design, integrating a technology that is more efficient
than typical class AB and has lower distortion than class D designs. Punch bd
amplifiers are 75-80% efficient vs. 20-60% efficient class ab amplifiers. This
means, more power from your amplifier with less drain on your vehicles
electrical and charging system.
Cast Aluminum Heatsink: The cast aluminum heatsink dissipates
heat generated by the amplifier's circuitry. The inherent advantage of casting
provides a 30% improvement of cooling over conventional extrusion heatsink
Dynamic Thermal Management (DTM): DTM Evenly distributes excess heat
across entire amplifier heatsink.
DSM (Discrete Surface Mount): DSM utilize 1% tight-tolerances improving efficiency of the circuit, decreases
cross-talk from other discrete components and lowers operating temperature. 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.
TO-247 MOSFETs: The Rockford Fosgate amplifier use custom TO-247
MOSFETs. These have 60% more metal tab area for more power capacity, lower
impedance and improved heat dissipation over traditional TO-220 MOSFETs found in
many other amplifier. The MOSFET transistor is the best type of device to use
when building a high quality mobile amplifier. The TO-247 has 60% more metal tab
area and its unique, fully encapsulated design is capable of housing a silicon
die (the heart of the MOSFET) twice as large as the TO-220. The larger die
provides more power handling capacity. Additionally, the extra metal tab area
ensures that no matter what size silicon die is inside, the thermal impedance
will always be lower than in the TO-220 due to improved heat dissipation.
MEHSA3: MEHSA3 reduces MOSFET
temperatures, lowers distortion, increases durability and prolongs the output
device life span. 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, using the exact same
components. A multi-layer insulated metal substrate operating with minimal
thermal resistance spreads heat both downward and outward to quickly dissipate
heat from each device across the heatsink. This process combined with Rockford's
optimized heatsink designs, DSM (Discrete Surface Mount) technology and MOSFET
devices, allows the amplifier 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 (NOn-Multiplying Advanced Decision): NOMAD 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.
Power and Protection LEDs: The LEDs are located on top of the
amplifier. A blue Power LED illuminates when the amplifier is turned on. A red
Thermal LED illuminates if the amplifier overheats. The yellow Protect LED
illuminates if a short circuit or too low an impedance is detected at the
speaker connections. When any of the protection circuits engage, the amp
automatically shuts down until the problem is corrected.
Internal Crossover: The amplifier features a built-in 12dB/octave
Butterworth low-pass filter with a variable crossover point from 35Hz to 250Hz.
Punch EQ2: The Punch EQ on-board equalization circuit helps correct for acoustical deficiencies
in the listening environment. This control is a narrow band adjustment variable
from 0dB to +18dB at 45Hz with a Gyrator based Punch EQ that eliminates
frequency shift with boost.
Infrasonic Filter: This 28Hz high-pass filter is designed to prevent
frequencies below the audio range from being applied to the subwoofer from the
amplifier. This infrasonic filter improves your subwoofer performance and power
handling, particularly in vented enclosures.
Power Connections: The power and ground terminals are nickel-plated
captive c-clamp wire connectors and will accommodate up to 4-gauge wire. An
external 100-amp fuse (not included) must be installed on the power wire. If a
wiring kit is used which includes a fuse with a value other than 100-amps, the
original should be replaced with a 100-amp fuse. The remote turn-on terminal
will accept wire sizes of 12- to 24-gauge. A Phillips-head or slotted
screwdriver (not supplied) is required to tighten/loosen the terminals.
Dual Speaker Terminals: The
Punch mono-amplifier features two pair of speaker output terminals so you can
easily connect two 4-ohm speakers to the amplifier in a 2-ohm load
configuration. The two pair of nickel-plated clamp wire connectors will
accept 8-gauge to 18-gauge wire. A Phillips-head or slotted screwdriver (not
supplied) is required to tighten/loosen the terminals.
Differential Input RCA Inputs: The amplifier features a pair of
differential RCA input jacks for easy connection of signal level input.
Differential input circuitry measures the voltage of both the positive (+) and
negative (-) portions of the input signal, subtracting the voltage common to
both conductors (noise); resulting in a cleaner signal. Reducing the noise on
the input then improves the sound quality of the output. The RCA input jacks are
nickel-plated to resist signal degradation caused by corrosion.
RCA Outputs: The amplifier also features a pair of RCA "Pass-Thru"
jacks which provide a convenient source for daisy-chaining an additional
amplifier without running an extra set of RCA cables from the front of the
vehicle to the rear amplifier location. The RCA output jacks are nickel-plated
to resist signal degradation caused by corrosion.
Remote Punch EQ (PEQ) Connection: An RJ-45 jack is provided for
connecting an optional remote PEQ control (575ROCKPEQ, sold separately). If you use
the remote PEQ, the Punch EQ control on the amp is disabled, and replaced by the
Note: Previous model Punch Bass and Para-Punch remotes will not
work with this amp.