This document is an installation and operation manual for Rockford Fosgate Dual Voice Coil (DVC) Subwoofers, specifically the Punch HE2 DVC, Punch HX2 DVC, and Power HX2 DVC series. These subwoofers are designed for high-performance, low-frequency sound reproduction in car audio systems.
Function Description:
The Rockford Fosgate DVC subwoofers are high-performance, low-frequency drivers engineered for use primarily in small sealed and ported (vented) enclosures. Their dual voice coil design allows for flexible wiring configurations to match various amplifier impedance loads, optimizing system performance. These subwoofers are designed to deliver high output at low frequencies while requiring minimal operating space, making them suitable for diverse car audio installations.
Important Technical Specifications:
The manual provides detailed specifications for numerous models across the Punch HE2 DVC, Punch HX2 DVC, and Power HX2 DVC series. Key specifications include:
- Nominal Impedance (ohms): Available in 4 (2) and 2 (2) ohm configurations, indicating the impedance of each voice coil.
- Voice Coil Diameter-inch (mm): Ranges from 2.0 (50.8) mm to 4.0 (101.6) mm, with larger diameters generally indicating higher power handling.
- FS (Hz): The resonant frequency of the subwoofer, ranging from 22 Hz to 40 Hz, indicating the lowest frequency at which the speaker naturally resonates.
- QTS: Total Q factor, a dimensionless parameter that describes the damping of the speaker, ranging from 0.313 to 0.64. Lower QTS values typically indicate better transient response and suitability for vented enclosures, while higher values are often better for sealed enclosures.
- VAS-cu.ft. (liter): Equivalent air compliance, representing the volume of air that has the same compliance as the speaker's suspension, ranging from 0.32 (9) liters to 7.03 (199) liters.
- Xmax-inch (mm): Maximum linear excursion, indicating how far the cone can move in one direction while maintaining linear output, ranging from .43 (11) mm to .74 (19) mm.
- SPL (dB @ 1w/1m): Sensitivity, measuring the sound pressure level produced by the speaker with 1 watt of power at 1 meter, ranging from 83 dB to 90.6 dB. Higher SPL indicates greater efficiency.
- Power Handling (RMS): Continuous power handling capacity, ranging from 250 watts to 1000 watts.
- Power Handling (Max): Peak power handling capacity, ranging from 500 watts to 2000 watts.
- Mounting Dia.-inch (mm): Cutout diameter for installation, ranging from 6-7/8 (175) mm to 16-15/16 (414) mm.
- Mounting Depth-inch (mm): Depth required for installation, ranging from 4-11/16 (119) mm to 9-1/8 (232) mm.
- Speaker Dis.-cu. ft. (liter): Volume displaced by the speaker itself, which must be subtracted from the gross enclosure volume, ranging from 0.031 (0.88) liters to 0.244 (6.92) liters.
- Recommended Enclosure Volumes:
- Sealed Box Vol.-cu. ft. (liter): Ranges from 0.25 (7.079) liters to 4.0 (113.28) liters.
- Vented Box Vol.-cu. ft. (liter): Ranges from 0.625 (17.7) liters to 5.0 (141.58) liters.
- Port Diameter & Length (in./cm): Specified for vented enclosures, including the number of ports, their diameter, and length (e.g., (1) 2.5 x 11.25 in. or (3) 4 x 18 in.).
Common Features across series:
- BART Surround: Foam (Punch HE2 DVC) or Santoprene (Punch HX2 DVC, Power HX2 DVC).
- Basket: LX Stamped (Punch HE2 DVC, Punch HX2 DVC) or Power LX Cast (Power HX2 DVC).
- Hyper extended pole piece.
- Aero-vent pole piece.
Usage Features:
- Enclosure Design: The manual provides recommendations for both sealed and vented enclosures, outlining their respective advantages.
- Sealed Enclosures: Simple to build, small footprint, linear (flat) response, no port noise, high power handling at all frequencies, and excellent sound quality. Requires airtight construction using glue and sealant.
- Vented Enclosures: Higher average output than sealed, adjustable tuning frequency by changing port length, deep bass response with lower power requirements, and great for high output with limited power.
- Volume Calculation: Instructions are provided for calculating enclosure volume, emphasizing the need to subtract the thickness of baffle material and the speaker's displacement from the gross volume.
- Wiring Configurations: Detailed diagrams illustrate various wiring options for dual voice coil speakers (1, 2, 3, or 4 speakers) to achieve different impedance loads (e.g., 1 ohm, 2 ohm, 2.67 ohm, 4 ohm). This flexibility allows users to match the subwoofer load to their amplifier's capabilities.
- Subwoofer Crossovers: Recommends using an active 80-100Hz low-pass crossover at 12dB/octave for optimum subwoofer performance. Explains the difference between passive and active crossovers.
- Safety Instructions: Emphasizes reading the manual, disconnecting the battery negative terminal before installation, and seeking professional installation if unsure. Warnings about potential injury or unit damage from improper installation are highlighted.
Maintenance Features:
- Product Registration: Users are advised to record their serial number and model number for warranty verification and product recovery in case of theft.
- Warranty Information: A limited warranty is provided by Rockford Corporation for products sold by Authorized Rockford Fosgate Dealers in the U.S. The warranty length varies by product type (1 year for Source Units, Speakers, Signal Processors, and PUNCH Amplifiers; 2 years for POWER Amplifiers; 3 years for Type RF Amplifiers; 90 days for Factory Refurbished Products).
- Warranty Coverage: Covers defects during the warranty period, with repair or replacement at Rockford's discretion.
- Exclusions: Damage from accident, abuse, improper operations, water, theft, reinstallation costs, unauthorized service, defaced serial numbers, subsequent damage to other components, and products purchased outside the U.S. or from unauthorized dealers are not covered.
- Obtaining Service: Instructions for obtaining a Return Authorization (RA#) by calling Rockford Customer Service are provided, with the user responsible for shipping the product to Rockford. Separate shipping addresses are given for Electronics and Speakers.
- EU Warranty: Notes that the product meets current EU warranty requirements, advising users to consult their authorized dealer for details.
The manual also includes a "Practice Safe Sound™" warning about continuous exposure to high sound pressure levels and the potential for permanent hearing loss. It encourages users to visit the Rockford Fosgate website for the latest product information and installation assistance through "RFTECH."
To Next Page
Need help?
General
