This document provides installation and operation instructions for Rockford Fosgate Punch HE2 DVC, Punch HX2 DVC, and Power HX2 DVC subwoofers, as well as Q-Logic subwoofer enclosures. It covers general information, safety instructions, design features, recommended enclosures (sealed and vented), wiring configurations, technical specifications, and warranty information.
Function Description
The Rockford Fosgate subwoofers are high-performance, low-frequency drivers with dual voice coils, designed primarily for use in small sealed and small ported enclosures. They are engineered to deliver high output at low frequencies while requiring minimal operating space. The Q-Logic enclosures are designed to optimize the performance of these subwoofers by providing a custom fit and allowing for specific tuning.
Important Technical Specifications
The manual provides detailed specifications for various models, including:
Punch HE2 DVC (8", 10", 12", 15" models):
- Nominal Impedance: 2 or 4 ohms (dual voice coil)
- Voice Coil Diameter: 2.0" (50.8mm) or 2.5" (63.5mm)
- FS (Resonance Frequency): Ranges from 23 Hz to 35 Hz
- QTS (Total Q Factor): Ranges from 0.35 to 0.64
- VAS (Equivalent Volume): Ranges from 0.48 cu.ft. (13.6L) to 6.10 cu.ft. (172.7L)
- Xmax (Linear Excursion): 0.43" (11mm) or 0.51" (13mm)
- SPL (Sensitivity): 83 dB to 87 dB @ 1w/1m
- Power Handling (RMS): 250W to 500W
- Power Handling (Max): 500W to 1000W
- Mounting Diameter: 7-1/16" (179mm) to 13-7/8" (352mm)
- Mounting Depth: 4-11/16" (119mm) to 7-11/16" (195mm)
- Speaker Displacement: 0.031 cu.ft. (0.88L) to 0.103 cu.ft. (2.91L)
- Recommended Sealed Box Volume: 0.3 cu.ft. (8.5L) to 2.5 cu.ft. (70.79L)
- Recommended Vented Box Volume: 0.625 cu.ft. (17.7L) to 2.5 cu.ft. (70.79L)
- Port Diameter & Length: Varies by model and enclosure type (e.g., 2.5" x 11.25" to 4" x 10.75")
- Features: BART Surround - Foam, Basket - LX Stamped, Hyper extended pole piece, Aero-vent pole piece.
Punch HX2 DVC (8", 10", 12", 15", 18" models):
- Nominal Impedance: 2 or 4 ohms (dual voice coil)
- Voice Coil Diameter: 2.5" (63.5mm) to 4.0" (101.6mm)
- FS (Resonance Frequency): Ranges from 22 Hz to 40 Hz
- QTS (Total Q Factor): Ranges from 0.325 to 0.5
- VAS (Equivalent Volume): Ranges from 0.32 cu.ft. (9L) to 7.03 cu.ft. (199L)
- Xmax (Linear Excursion): 0.55" (14mm) or 0.74" (19mm)
- SPL (Sensitivity): 83 dB to 90.6 dB @ 1w/1m
- Power Handling (RMS): 400W to 1000W
- Power Handling (Max): 800W to 2000W
- Mounting Diameter: 6-7/8" (175mm) to 16-15/16" (414mm)
- Mounting Depth: 4-13/16" (122mm) to 9-1/8" (232mm)
- Speaker Displacement: 0.041 cu.ft. (1.16L) to 0.244 cu.ft. (6.92L)
- Recommended Sealed Box Volume: 0.3 cu.ft. (8.5L) to 4.0 cu.ft. (113.28L)
- Recommended Vented Box Volume: 0.625 cu.ft. (17.7L) to 5.0 cu.ft. (141.58L)
- Port Diameter & Length: Varies by model and enclosure type (e.g., 2.5" x 11.25" to (3) 4" x 8.75")
- Features: BART Surround - Santoprene, Basket - LX Cast, Hyper extended pole piece, Aero-vent pole piece.
Power HX2 DVC (10", 12", 15", 18" models):
- Nominal Impedance: 2 or 4 ohms (dual voice coil)
- Voice Coil Diameter: 4.0" (101.6mm)
- FS (Resonance Frequency): Ranges from 22 Hz to 28 Hz
- QTS (Total Q Factor): Ranges from 0.313 to 0.451
- VAS (Equivalent Volume): Ranges from 0.60 cu.ft. (17L) to 7.03 cu.ft. (199L)
- Xmax (Linear Excursion): 0.74" (19mm)
- SPL (Sensitivity): 83 dB to 89.4 dB @ 1w/1m
- Power Handling (RMS): 1000W
- Power Handling (Max): 2000W
- Mounting Diameter: 9-3/16" (234mm) to 16-15/16" (414mm)
- Mounting Depth: 6-11/16" (170mm) to 9-1/8" (232mm)
- Speaker Displacement: 0.115 cu.ft. (3.25L) to 0.244 cu.ft. (6.92L)
- Recommended Sealed Box Volume: 0.625 cu.ft. (17.7L) to 4.0 cu.ft. (113.28L)
- Recommended Vented Box Volume: 1.75 cu.ft. (49.56L) to 5.0 cu.ft. (141.58L)
- Port Diameter & Length: Varies by model and enclosure type (e.g., (3) 3" x 16.5" to (4) 4" x 18")
- Features: BART Surround - Santoprene, Basket - Power LX Cast, Hyper extended pole piece, Aero-vent pole piece.
Q-Logic Enclosures (QLH-1.2512sx/dx, QLT-1.2512sx):
These enclosures feature the Q-Ring, a multi-diameter woofer mounting adapter designed to extract optimum performance from any driver. The manual includes a port tuning chart for various cubic feet and FS values, providing recommended port lengths for optimal performance.
Usage Features
Installation & Operation:
- Safety First: Emphasizes practicing safe sound levels (continuous exposure over 100dB can cause permanent hearing loss).
- Professional Installation Recommended: Suggests installation by an Authorized Rockford Fosgate Dealer for maximum performance and to ensure proper wiring and setup.
- Enclosure Building:
- Sealed Enclosures: Simplest to build, require airtight construction using 3/4" MDF, glue, and sealant. Larger enclosures offer flatter response and deeper bass; smaller boxes provide higher SPL. Advantages include small size, linear response, no port noise, high power handling, and excellent sound quality.
- Vented Enclosures: Include a vent or port to "tune" the enclosure. Larger boxes tune to lower frequencies, while medium/small boxes tune to higher frequencies. Vented designs offer higher average output than sealed, adjustable tuning frequency, deep bass with lower power requirements, and great high output with limited power.
- Volume Calculation: Provides a formula (Height" x Width" x Depth" / 1728) for calculating internal volume in cubic feet, accounting for baffle material and speaker displacement.
- Wiring Configurations: Detailed diagrams are provided for various impedance loads (1 ohm, 2 ohm, 2.67 ohm, 4 ohm) using one, two, three, or four DVC speakers, allowing users to match their system's requirements. Configurations include series, parallel, and series-parallel wiring.
- Subwoofer Crossovers: Recommends using an active 80-100Hz low-pass crossover at 12dB/octave for optimum subwoofer performance.
- Q-Logic Enclosure Specifics:
- Driver and Q-Ring Preparation: Involves applying foam tape to the driver and mounting ring, and trimming centering tabs on the Q-Ring if necessary to ensure a proper fit.
- Driver Mounting: Instructions for aligning the Q-Ring with the enclosure, connecting speaker leads, aligning mounting holes, and securely mounting the driver with supplied screws.
- Port Tuning (for vented Q-Logic enclosures):
- Determine port length using the provided chart based on the woofer's VAS and FS.
- Remove the plastic port plug from inside the enclosure by unscrewing it and pressing it out.
- "X" cut the carpet over the port hole to allow it to extend into the port and act as a gasket.
- Slide the cut and tuned port into the port hole.
- Speaker Placement: Advises experimenting with subwoofer location (upward, forward, or backward) for optimal sound quality in hatchbacks.
- Secure Mounting: Emphasizes permanent mounting for safety and best sound quality, suggesting suitable brackets if removable mounting is desired.
Maintenance Features
- Warranty Information:
- Length of Warranty:
- Source Units, Speakers, Signal Processors, PUNCH Amplifiers: 1 Year
- POWER Amplifiers: 2 Years
- Type RF Amplifiers: 3 Years
- Factory Refurbished Product: 90 days (receipt required)
- Coverage: Applies to products sold by Authorized Rockford Fosgate Dealers in the U.S. to original purchasers.
- What is Not Covered: Damage from accident, abuse, improper operations, water, theft; costs related to removal/reinstallation; service by unauthorized personnel; defaced/removed serial numbers; subsequent damage to other components; products purchased outside the U.S. or from unauthorized dealers.
- Obtaining Service: Requires calling Rockford Customer Service (1-800-669-9899) to obtain a Return Authorization (RA#) before shipping the product to Rockford for repair.
- General Care: While not explicitly detailed as "maintenance," the emphasis on proper installation, using authentic accessories, and sealing enclosures implies that correct initial setup is crucial for the longevity and performance of the device.
- Product Recovery: Recording the serial and model numbers is recommended for permanent record and potential use in recovering stolen products.
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