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2002-2013 Chevy Silverado HD Crew Truck Harmony F124 Dual 12" Sub Box Enclosure

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Key item features

1 x 2002-2013 Chevy Avalanche Car Audio Custom Dual 12" Subwoofer Enclosure Sub Box
2 x Harmony Stereo HA-F124 Car Stereo Flatline Series 800 Watt Single 4 Ohm 12" Sub
2002-2013 Chevy Avalanche Car Audio Custom Dual 12" Subwoofer Enclosure
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Constructed with High Quality MDF
High Quality Spring Loaded Terminal Cups (Bare Wire 'up to 10GA')
High Quality Black Carpet
2002-2013 Chevy Avalanche
12" Flatline Series Car Subwoofer
Power Handling:
Peak: 800 watts
RMS: 400 watts
Peak: 800 watts
RMS: 400 watts
Peak: 800 watts
RMS: 400 watts
Sensitivity: 87.3dB
Frequency Response: 25Hz-1.2Hz
Mounting Depth: 4 1/2"
Mounting Cutout Diameter: 11 1/8"
Min Sealed Box Volume (Cubic Feet): 0.55
Max Sealed Box Volume (Cubic Feet): 3
Min Vented Box Volume (Cubic Feet): 1.68
Max Vented Box Volume (Cubic Feet): 2.25
Single 4 Ohm
Polypropylene Injection Molded Cone
Aluminum Cone Cap
Butyl Rubber Surround
Tinsel Leads Woven into Spider
2" Copper Voice Coil
Steel Basket
Ferrite Magnet
Kapton Former Material

Specs

Rms power rating
400 W
Woofer size
12 in
Subwoofer type
Subwoofer
Brand
Harmony Accessory Master
Subwoofer enclosure type
Sealed
Impedance
4 ohm

Current price is $318.95

Price when purchased online

Free shipping
Free 30-day returns

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How do you want your item?

Columbus, 43215

Arrives by Thu, Apr 9

Sold and shipped by HiFiSoundConnectionPro Seller

4.247697031729785 stars out of 5, based on 977 seller reviews(4.2)

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About this item

Product details

Upgrade your 2002–2013 Chevy Silverado HD Crew Cab with the Harmony F124 Dual 12" Sub Box Enclosure, designed to deliver deep, powerful bass in a clean, underseat configuration. This custom-fit enclosure is built to house two Harmony F124 12-inch subwoofers and fits perfectly beneath the rear seat, preserving passenger space and maintaining a factory-style appearance. It’s the ideal solution for truck owners looking to enhance their in-cab audio without sacrificing interior comfort or utility.

The enclosure is internally tuned to optimize the performance of the F124 subwoofers, delivering tight, distortion-free bass that complements all music genres—from hip-hop and EDM to rock and country. The dual 12-inch setup provides a full, rich low-end that enhances your entire audio experience with hard-hitting precision. Whether you're upgrading from a factory system or building a custom setup, this enclosure offers the sound and quality you need.

Finished in a durable Rhino-coated exterior, the box is designed to withstand moisture, scratches, and vibrations, making it perfect for everyday use, work trucks, or long hauls. Installation is straightforward, with no major modifications required. For Silverado HD owners seeking a rugged, high-performance bass upgrade with a stealthy, OEM-style fit, the Harmony F124 Dual 12" Sub Box Enclosure is the perfect choice.

1 x 2002-2013 Chevy Avalanche Car Audio Custom Dual 12" Subwoofer Enclosure Sub Box
2 x Harmony Stereo HA-F124 Car Stereo Flatline Series 800 Watt Single 4 Ohm 12" Sub
2002-2013 Chevy Avalanche Car Audio Custom Dual 12" Subwoofer Enclosure
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Air Space: 0.48 Cubic Feet per Sub
Mounting Depth: 4 1/2"
Sealed Enclosure
Dimensions: Width 48" x Height 6" x Depth 16-3/4"
Constructed with High Quality MDF
High Quality Spring Loaded Terminal Cups (Bare Wire 'up to 10GA')
High Quality Black Carpet
2002-2013 Chevy Avalanche
12" Flatline Series Car Subwoofer
Power Handling:
Peak: 800 watts
RMS: 400 watts
Peak: 800 watts
RMS: 400 watts
Peak: 800 watts
RMS: 400 watts
Sensitivity: 87.3dB
Frequency Response: 25Hz-1.2Hz
Mounting Depth: 4 1/2"
Mounting Cutout Diameter: 11 1/8"
Min Sealed Box Volume (Cubic Feet): 0.55
Max Sealed Box Volume (Cubic Feet): 3
Min Vented Box Volume (Cubic Feet): 1.68
Max Vented Box Volume (Cubic Feet): 2.25
Single 4 Ohm
Polypropylene Injection Molded Cone
Aluminum Cone Cap
Butyl Rubber Surround
Tinsel Leads Woven into Spider
2" Copper Voice Coil
Steel Basket
Ferrite Magnet
Kapton Former Material

info:

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Specifications

Rms power rating

400 W

Woofer size

12 in

Subwoofer type

Subwoofer

Brand

Harmony Accessory Master

Warranty

Warranty information

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