Alpine Subwoofers with Boxes (39)

Alpine SWT-S10 1200W Max Single 10" Sealed Subwoofer Bass Tube Enclosure Combining the intense low-bass performance and ground-shaking output of the traditional Type-R subwoofer tube in a thin package optimized for tiny enclosures. The SWT 10” Truck Subwoofer has been engineered to offer more installation flexibility without sacrificing enormous output to build the ideal sound system for your truck. At 4-1/8” deep. These subs provide deep bass performance where it usually couldn’t fit in a truck. The vented pole optimized for a 4-1/8” deep box is the ideal enclosure size, meaning excellent bass performance can fit just about anywhere in your truck. General Features: Single 10" Sealed Subwoofer Tube Enclosure 1200 Watts MAX Power Handling 250 Watts RMS Power Handling Final Impedance: 4 ohms Preloaded with a single 10" Subwoofer Sealed enclosure with embroidered black carpet Enclosure Dimensions: 11.25"W x 23.65" D 1-year Manufacturer's Warranty Subwoofer Features: 10" Passive Subwoofer Push SPK Terminal Frequency Response: 35-200 Hz Sensitivity: 90dB Enclosure Features: Tube enclosure Black Carpet Finish with White Alpine Logo Grille included What is in the Alpine SWT-S10 package: W10S4 owner's manual One 10" Subwoofer per box Adhesive-backed foam gasket Application Guide Online product registration information Warranty Information Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

 Alpine S-W10D4 10" Type S Best Subwoofer for Car Audio with Absolute SS10 Custom Sub Box Enclosure Package This Package Includes the Following Items: 1 x Absolute SS10 Car Audio Single 10" Sealed Subwoofer Sub Box Enclosure MDF Wood 1 x Alpine S-W10D4 Car Audio Type S Series Sub Dual 4 Ohm 1200W Peak 10" Subwoofer Alpine S-W10D4 1800W Max (600W RMS) 10" S-Series Dual 4 Ohm Car Subwoofer General Features: 10" 4 ohm S-Series (Type-S) Subwoofer Power Handling: Peak: 1800 watts RMS: 600 watts Recommended power range: 250- 600W RMS Pulp/Kevlar Cone High Amplitude Multi-Roll (HAMR) Surround Progressive Spider with Reinforced Layer Tinsel Leads Airflow Optimized Dual Flare Pole Vent High Strength Steel Frame Basket 8 AWG Push Terminals with VC Configuration Jumpers Dual Voice Coil High-Grade Strontium Ferrite Magnets Top-mount depth: 4-11/16" Cutout diameter: 8-13/16 Frequency Response: 26- 200Hz Sensitivity: 86.4dB Resonance Frequency (Fs): 33 Hz Authorized Dealer 1-year Manufacturer's Warranty What is in the S-W10D4 package: Alpine S-W10D4 owner's manual One 10" Dual 4-ohm voice coil subwoofer Two 3" jumper cables Subwoofer Application Guide Online product registration information Warranty information ⚠️Warning:This product can expose you to, known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine PWV-SB10 10" BassRev™ Powered Subwoofer Enclosure Bring your music to life with the Alpine PWV-SB10, a high-performance 10" powered subwoofer built for deep, impactful bass. With a powerful built-in amplifier delivering 400W RMS (200W x 2) and a dual 4-ohm voice coil design, this subwoofer delivers strong, controlled low frequencies with impressive clarity.Engineered with a sealed enclosure and a wide frequency response of 31–200 Hz, the PWV-SB10 ensures tight, distortion-free bass that enhances any genre of music. Fine-tune your sound with a variable low-pass filter (50–200 Hz), phase selector (0°/180°), and a remote level control for on-the-fly adjustments.Whether you're upgrading a factory system or building a custom setup, the PWV-SB10 offers clean, powerful bass and flexible tuning in one sleek package—the perfect blend of Alpine quality and low-end performance.Specifications:Performance: Amplifier Power Output RMS Per Channel, Ref.: 4 ohm, 14.4V: 400 W (200 W x 2) Speaker Diaphragm size nominal 10 inch (25 cm) Speaker Impedance Dual Voice Coil 4 Ohm + 4 Ohm Speaker Power Handling RMS/Peak: 200W + 200W/400W + 400W Frequency Response +0/-3dB: 31-200 Hz Enclosure Type: Sealed Control: Input Impedance: >10 kOhms Input Sensitivity RCA Input Ref.: Rated Power into 4 Ohms: Hi Level: 0.5 - 10V. Lo level: 0.2 - 2.0V Phase Selector 2 position: 0°/180° Crossover Variable LPF: 50 - 200 Hz (-24 dB/oct.) Remote Level Linear Attenuation 0 to -20dB General Dimensions: Width: 470mm (18 1/2") Height: 282 mm (11") Depth without grille: 126 mm (5") Depth including grille: 170 mm (6 3/4") Weight: 9.7 kg (21 lb 6.4 oz) Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine PWV-SB12 12" BassRev™ Powered Subwoofer Enclosure & Absolute BT1700 Electrical Tape & Swivel Mobile Bracket Holder Bundle Get the benefits of large-enclosure sound in a shallow-enclosure design! With proprietary technology designed to increase bass output without compromising space, the BassRev Powered Subwoofer Enclosures are sure to take your bass performance to the next level.OPTIM Sync Technology – The built-in DSP amplifier includes OPTIM Sync technology, which uses a proprietary dynamic bass-boost algorithm to extend bass frequencies on the preloaded subwoofer, delivering big-bass sound in a shallow enclosure.Shallow Design – The subwoofer's shallow footprint allows it to fit virtually anywhere in most vehicles.Attractive Design – The subwoofer enclosure is built from sturdy MDF with a double-brace structure, finished with premium black carpet and an embroidered white Alpine logo for bold contrast.General Features:• Preloaded BassRev Subwoofer• Available in a 10” or 12” size• Built-in powered DSP amplifier with OPTIM Sync technology• Shallow footprint for flexible fitment• Sealed enclosure• Carpeted MDF enclosure with double brace structure• Embroidered Alpine logo• Extended grille designSYSTEM COMPONENTS:• Preloaded Subwoofer EnclosureSYSTEM TECH SPECS:• 12” Enclosure Dimensions: 533mm (21”) W x 343mm (13.5”) H x 168mm (6 5/8”) D• Power Handling: 200W RMS / 400W Peak• Nominal Impedance: 4Ω• Frequency Response: 31 Hz – 200 Hz Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine PWV-SB12 12" BassRev™ Powered Subwoofer Enclosure Get the benefits of large enclosure sound in a shallow enclosure design! With proprietary technology designed to increase bass output without compromising space, the BassRev Powered Subwoofer Enclosures are sure to take your bass performance to the next level.OPTIM Sync Technology – The built-in DSP amplifier includes OPTIM Sync technology, which uses a proprietary dynamic bass-boost algorithm to extend bass frequencies on the preloaded subwoofer, delivering big-bass sound in a shallow enclosure.Shallow Design – The subwoofer's shallow footprint allows it to fit virtually anywhere in most vehicles.Attractive Design – The subwoofer enclosure is built with sturdy MDF with a double brace structure, finished with a premium, black carpet and embroidered white Alpine logo for a bold contrast.General Features:• Preloaded BassRev Subwoofer• Available in a 10” or 12” size• Built-in powered DSP amplifier with OPTIM Sync technology• Shallow footprint for flexible fitment• Sealed enclosure• Carpeted MDF enclosure with double brace structure• Embroidered Alpine logo• Extended grille designSYSTEM COMPONENTS:• Preloaded Subwoofer EnclosureSYSTEM TECH SPECS:• 12” Enclosure Dimensions: 533mm (21”) W x 343mm (13.5”) H x 168mm (6 5/8”) D• Power Handling: 200W RMS / 400W Peak• Nominal Impedance: 4Ω• Frequency Response: 31 Hz – 200 Hz Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine S2-SB10V 10" Halo S-Series Preloaded Subwoofer Ported Enclosure & Absolute BT1700 Electrical Tape & Swivel Mobile Bracket Holder Bundle Double The Fun -Alpine has been pumping out great sound for over 40 years, and now their Halo Series subwoofer enclosures make it easier to add more bass to your system. You'll get the low end you're looking for from one box, but when you want to expand your system, you can add a second enclosure and the optional linking kit to create a single two-speaker system with double the impact.Dishing It Out -The S2-SB10V comes loaded with Alpine's S2-W10D4 subwoofer wired for 2-ohm impedance. The sub's Kevlar-reinforced cone and Santoprene surround give you solid bass response at power levels up to 600 watts RMS. The ported enclosure is tuned to 36 Hz to maximize performance.Getting It Together -Two S2-SB10V enclosures can be linked using Alpine's KTX-H10 linking kit (sold separately). Heavy-duty steel front and rear linking brackets connect the enclosures for a compact, sturdy dual-subwoofer solution. The silver linking brackets match the enclosure trim for a neat, coordinated look.General Features:• 10" ported subwoofer enclosure• loaded with Alpine's S2-W10D4 subwoofer• linkable to second S2-SB10V enclosure with linking kit (sold separately)• Kevlar-reinforced pulp cone with Santoprene rubber surround• power handling: 600 watts RMS• frequency response: 28-200 Hz• 2-ohm impedance• dimensions: 16"W x 12.75"H x 15"D• warranty: 1 yearSpecifications:• Driver: Single 10."• Impedance: 2Ω (dual 4Ω voice coils paralleled)• Power Handling: 600W RMS• Enclosure: Ported• Frequency Response: 28-200Hz• Port Tuning: 36Hz• Dimensions: W = 16.0", H = 12.750", Depth = 15.0" Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine S2-SB10V 10" Halo S-Series Preloaded Subwoofer Ported Enclosure with ProLink Double The Fun -Alpine has been pumping out great sound for over 40 years, and now their Halo Series subwoofer enclosures make it easier to add more bass to your system. You'll get the low end you're looking for from one box, but when you want to expand your system, you can add a second enclosure and the optional linking kit to create a single two-speaker system with double the impact.Dishing It Out -The S2-SB10V comes loaded with Alpine's S2-W10D4 subwoofer wired for 2-ohm impedance. The sub's Kevlar-reinforced cone and Santoprene surround give you solid bass response at power levels up to 600 watts RMS. The ported enclosure is tuned to 36 Hz to maximize performance.Getting It Together -Two S2-SB10V enclosures can be linked using Alpine's KTX-H10 linking kit (sold separately). Heavy-duty steel front and rear linking brackets connect the enclosures for a compact, sturdy dual-subwoofer solution. The silver linking brackets match the enclosure trim for a neat, coordinated look.General Features:• 10" ported subwoofer enclosure• loaded with Alpine's S2-W10D4 subwoofer• linkable to second S2-SB10V enclosure with linking kit (sold separately)• Kevlar-reinforced pulp cone with Santoprene rubber surround• power handling: 600 watts RMS• frequency response: 28-200 Hz• 2-ohm impedance• dimensions: 16"W x 12.75"H x 15"D• warranty: 1 yearSpecifications:• Driver: Single 10."• Impedance: 2Ω (dual 4Ω voice coils paralleled)• Power Handling: 600W RMS• Enclosure: Ported• Frequency Response: 28-200Hz• Port Tuning: 36Hz• Dimensions: W = 16.0", H = 12.750", Depth = 15.0" Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

2 Alpine R2-SB10V Loaded 10" 750w R2-W10D4 Subwoofers + Ported Sub Enclosure Box Alpine R2-SB10V R-Series Single Type R2 10-in Subwoofer in Vented Enclosure Enclosure Stacking FeaturesUnique to Alpine, the subwoofer enclosures are available in 10-inch and 12-inch sizes, offered in either single or “linked” formats, with an optional mounting bracket. This innovative design enables the discerning consumer to add more bass to their system easily.Optimized PerformanceThe ported enclosure design delivers a higher total sound output, providing deep, powerful bass, reliable sound reproduction, and overall excellent sound quality. The 10-inch enclosure is tuned to 36 Hz, while the 12-inch enclosure is tuned to 35 Hz, for optimized performance with Alpine’s S-Series and R-Series subwoofers.General Features: Includes R2-W10D4 wired in parallel 750W RMS power handling 2 Ohm Impedance Ported Enclosure Design Frequency Response: 24-200Hz Vent Tuning Frequency: 35Hz Dimensions: 16” W x 12.6825” H x 14.5” D Authorized Dealer 1-year Warranty Alpine KTX-H10 Linking Kit When it comes to bass, two is always better than one. Alpine's KTX-H10 linking kit allows you to connect two Alpine subwoofer enclosures to double your bass. The kit includes heavy-duty steel front and rear linking brackets to securely connect the enclosures, along with all the necessary hardware. The front bracket's silver finish is made to coordinate with the enclosures' design, while the silver Alpine badge adds a touch of style. Warranty: 1 year.What is in the box: Front port-link Two 9" front port braces 23.25" Rear link-plate Four 25mm hex-socket screws Eight 14mm hex-socket screws Four 20mm threaded alignment posts 3mm Allen-key Installation instructions Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine PSS-23WRA Powered Sound System Upgrade for 2018 - Up Jeep Wrangler Unlimited Powered System Upgrade for 2018-Up Jeep® Wrangler Unlimited JL TAKE YOUR WRANGLER’S SOUND BEYOND THE FACTORYEnjoy premium sound quality even with your JL’s top-off! The PSS-23WRA is a 300-watt system upgrade featuring a powered subwoofer, amplifier, and tweeters for the 2018-Up Jeep Wrangler Unlimited JL without the factory amplified system. The PSS-23WRA provides excellent sound performance whether the JL’s top is on or off.SOUND THAT WILL TURN HEADS WITH THE TOP ON OR OFFThe PWE-S8 subwoofer is engineered to load and disperse lower-frequency sound into the passenger’s footwell area to maximize bass extension throughout the Jeep for great sound with the top on or off. The subwoofer includes a remote bass knob so you can control the bass level from the convenience of your dashboard. The included 4-channel amplifier more than doubles the power over the factory system, allowing you to enjoy your tunes with the top off. EASY BOLT-IN INSTALLATIONThe PWE-S8 Powered Subwoofer and KTP-445U Power Pack Amplifier don’t take up much space since they mount under the passenger’s seat. The two products come pre-connected for easy bolt-in installation with simple wire routing. Mounting brackets for the products are included as well.SIMPLE TWEETER REPLACEMENTThe SPR-10TW Component Tweeters replace the factory tweeters on the top of the dash. These high-performance tweeters add much-needed high-frequency response that is lacking in the factory Jeep JL systems. An EQ Ring improves the tweeter’s dispersion characteristics and delivers a wide, flat frequency response.WORKS WITH ANY RADIOThe included T-harness gets the necessary audio signal connections from behind the Wrangler’s radio, making installation a breeze. The PSS-23WRA is compatible with Alpine universal head units, the factory Jeep base radio, or other aftermarket radios. General Features: Complete Direct Fit Audio System Upgrade Compatible with 2018-Up Jeep Wrangler Unlimited JL Compatible with models that don't have a factory-amplified system All installation hardware, such as speaker adapters and amplifier wiring, is included CEA-2006 Compliant System 300 Watt RMS sound system The system consists of: 8" Powered Subwoofer Universal Power Pack Amplifier 2" Component Tweeters Tweeter Adapters Authorized Dealer 1-year Manufacturer's Warranty PWE-S8 Subwoofer Features: Peak: 240 watts RMS: 120 watts 8" woofer high-excursion cone built-in Class D amplifier frequency response: 32-150 Hz variable low-pass crossover (80-200 Hz) variable phase control (0-180 degrees) preamp- and speaker-level inputs Dimensions: 13-1/2"W x 3"D x 9"H KTP-445U Amplifier Features: RMS Power Rating: 4 ohms: 45 watts x 4 Channel 2 ohms: 45 watts x 4 Channel 4 ohms: 90 watts x 2 Channel (Bridged) Total RMS power output: 180 watts CEA-2006 compliant amplifier Increases the output of any head unit without having to install a full-size amplifier and amp install kit The Independent front/Rear gain switch is adjustable from high to low Runs off the receiver's power circuit High-Pass Filter: selectable 60/80/120 Hz @ 12 dB/octave Fast and simple installation 4-channel operation for four speakers Minimum impedance of 2 ohms Frequency response: 20-20,000 Hz Fuse Rating: 15A x 1 SPR-10TW Component Tweeters: 2" Type-R Series Car Tweeters Power Handling: Peak: 450 watts per pair / 225 watts each RMS: 150 watts per pair / 75 watts each Silk Dome tweeter construction 4 ohms impedance Copper-Clad Aluminum high-temperature voice coil 75% smaller external crossover filter removes harmful frequencies 4-way tweeter level attenuation High-grade Neodymium magnet structure Surface / Bottom / Flush Mountable CEA-2031 compliant speakers Sensitivity: 88dB Frequency response: 1,000-29,000 Hz Top-mount depth: 11/16" Vehicle Compatibility: JEEP 2018 - Up Wrangler Unlimited JL Compatible with Wrangler JL Models that don't have a factory amplified system What's in the PSS-23WRA package: KTP-445U amplifier PWE-S8 powered subwoofer (both pre-attached to vehicle mounting bracket) 7' Signal harness 12' Loomed power wire w/ inline 20A fuse 52-Pin t-harness Four 10" speaker to RCA harnesses Two SPR-10TW tweeters w/ integrated mounting plates and 8" wire loom w/ inline crossovers Remote bass-level control w/ attached 16' cable 3" Strip of hook-and-loop fastener Ten 6" wire-ties 1/2" Self-tapping screw Star-washer 2 Alpine logos Installation guide Warranty sheet Alpine PSS-23WRA owner's manual Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine RS-SB10 10" Halo R-Series R2 Preloaded Subwoofer Enclosure with ProLink The next generation of sound performance is here with the new R-Series Halo Preloaded Subwoofers featuring the new R-Series “R2” subwoofers for more accurate and authoritative bass. PRODUCT FEATURES: Unique ProLink Design – ProLink is exclusive to Alpine and enables you to link two R2-SB10V enclosures together using an optional KTX-H10 linking kit, creating a dual subwoofer enclosure. Stand Out in the Crowd – Drawing inspiration from the sleek, tapered lines and clean silver finish of the Alpine Halo display, the R2-SB10V shares the same unique, curved edges outlined by a silver trim and a metallic front baffle for a matching system aesthetic. Improved Performance – The new R-Series alpine 10 inch subwoofer now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control compared to the previous generation. General Specs: Size: 10” Weight: 42 lbs Dimensions: 16” x 12.68” x 14.5” Frequency Response: 26Hz - 200Hz Power Range: 300W - 750W RMS Power Handling: 750W RMS / 2250W Peak Magnet Weight: 123 oz Voice Coil Diameter: 65.5 mm (2.6”) Linear Excursion (Xmax): 20 mm T/S Parameters: Sensitivity (1W/1m): 82.3 dB DC Resistance (Re): 1.9Δ + 1.9Δ Free Air Resonance (Fs): 31 Hz Equivalent Stiffness: 18.2 L Mechanical Q (Qms): 7.07 Electrical Q (Qes): 0.5 Total Q (Qts): 0.47 Cone Area (Sd): 333 cm2 Linear Excursion (Xmax): 20 mm Mechanical Travel (Xmech): 70 mm The next generation of sound performance is here with the new R-Series Halo Preloaded Subwoofers featuring the new R-Series “R2” subwoofers for more accurate and authoritative bass. Unique ProLink Design – ProLink is unique to Alpine and allows you to link two R2-SB10V enclosures together using an optional KTX-H10 linking kit to create a dual subwoofer enclosure. Stand Out in the Crowd – Drawing inspiration from the sleek, tapered lines and clean silver finish of the Alpine Halo display, the R2-SB10V shares the same unique, curved edges outlined by a silver trim and a metallic front baffle for a matching system aesthetic. Improved Performance – The new R-Series subwoofers now feature larger, double-stacked magnets that contribute more motor force for deeper bass and tighter bass control compared to the previous generation. Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.

Alpine SWT-S10 1200W Max Single 10" Sealed Subwoofer Bass Tube Enclosure Combining the intense low-bass performance and ground-shaking output of the traditional Type-R subwoofers in a thin package optimized for tiny enclosures. The SWT 10” Truck Subwoofer has been engineered to offer more installation flexibility without sacrificing enormous output to build the ideal sound system for your truck. At 4-1/8” deep. These subs provide deep bass performance where it usually couldn’t fit in a truck. The vented pole optimized for a 4-1/8” deep box is the ideal enclosure size, meaning excellent bass performance can fit just about anywhere in your truck. General Features: Single 10" Sealed Subwoofer Tube Enclosure 1200 Watts MAX Power Handling 250 Watts RMS Power Handling Final Impedance: 4 ohms Preloaded with a single Alpine 10 inch subwoofer Sealed enclosure with embroidered black carpet Enclosure Dimensions: 11.25"W x 23.65" D 1-year Manufacturer's Warranty Subwoofer Features: 10" Passive Subwoofer Push SPK Terminal Frequency Response: 35-200 Hz Sensitivity: 90dB Enclosure Features: Tube enclosure Black Carpet Finish with White Alpine Logo Grille included What is in the SWT-S10 package: W10S4 owner's manual One 10" Subwoofer per box Adhesive-backed foam gasket Application Guide Online product registration information Warranty Information Warning:This product can expose you to, known to the State of California, to cause cancer. For more information, go to P65Warnings.ca.

2 Alpine S2-SB10V 10" Vented Loaded Halo Enclosure with Alpine KTA-30MW Weather-resistant Amplifier Alpine S2-SB10V 10" Vented Loaded Halo Enclosure with Alpine KTA-30MW Weather-resistant Amplifier - This bundle includes an Alpine S-SB10V Pre-Loaded S-Series 10-inch Subwoofer Enclosure, an Alpine KTA-30MW Mono Tough Power Pack Amplifier 200 RMS x 1 at 4-Ohms / 300 RMS x 1 at 2-Ohms, a pry kit, and an Alpine cozy.Alpine S2-SB10V Pre-Loaded S-Series 10-inch Subwoofer EnclosureAlpine Electronics of America, Inc. has introduced a new sound system lineup for the Halo category, which includes a 10-inch enclosure and a remote bass knob. The enclosures are pre-loaded with S-Series and R-Series subwoofers.This sound system was designed to complement the Halo display in both power and performance for a premium sound experience. With the new modular design, customers can enjoy a single-box design while having a flexible upgrade path. A single box can be used, or two enclosures can be linked together with an optional kit to create a dual sub enclosure.Enclosure Stacking FeaturesUnique to Alpine, the 10-inch subwoofer is available in a single or “linked” format with an optional mounting bracket. This innovative design enables the sound consumer to add more bass to their system easily.Optimized PerformanceThe ported enclosure design delivers a higher total sound output, providing deep, powerful bass, reliable sound reproduction, and overall excellent sound quality. The 10-inch enclosure is tuned to 36 Hz; however, for optimized performance with Alpine’s S-Series and R-Series subwoofers, it is tuned to 35 Hz.General Features: S-SB10V Pre-Loaded S-Series 10-inch Subwoofer Enclosure Includes S-W10D4 wired in parallel 600W RMS power handling 2Ω Impedance Ported enclosure design Frequency response: 28-200 Hz Vented enclosure tuning frequency: 36 Hz Dimensions 16-inch W x 12.6825-inch H x 14.5-inch D What is in the S-SB10V box: Ported enclosure loaded with one S-W10D4 subwoofer driver Rubber flange protector (installed on the subwoofer) Alpine KTX-H10 Linking Kit Heavy-duty steel front and rear linking brackets for connecting two Alpine Halo. Linking Kit for Dual 10" Alpine Halo Preloaded Subwoofer Enclosures with ProLink, Heavy-duty steel front and rear linking brackets for connecting two Alpine Halo 10" subwoofer enclosures Add more bass to your sound system with the Linking Kit for Dual 10" Alpine Halo Preloaded Subwoofer Enclosures, featuring Alpine's new ProLink™ technology. General Features: Aluminum rear link plate 10-inch Front ABS / Steel reinforced the port link Center link stabilizing dowels Alpine logo plate All hardware included Authorized Internet Dealer What is in the KTX-H10 box: Front port-link Two 9" front port braces 23.25" Rear link-plate Four 25mm hex-socket screws Eight 14mm hex-socket screws Four 20mm threaded alignment posts 3mm Allen-key Installation instructions Safety warnings KTX-H10 Linking Kit owner's manual Warning:This product can expose you to chemicals known to the State of California to cause cancer. For more information, go to P65Warnings.ca.