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MTX ThunderForm

Custom-fit black subwoofer — fits 2007-up Chevrolet Silverado and GMC Sierra Extended Cab

Item # 236C150E7L

Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden...

Read more from Crutchfield writer, Dominic D.

Find what Fits your car

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Ships from manufacturer

$449.99

About the MTX ThunderForm

Big bass, factory look

Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden corners of your vehicle except great bass. ThunderForm enclosures fill the nooks and crannies of your vehicle with low tones that stand out, but their factory look blends right in.

Big bass, factory look

Crinkled french fries, discarded receipts, old gum wrappers — you probably have everything in the hidden corners of your vehicle except great bass. ThunderForm enclosures fill the nooks and crannies of your vehicle with low tones that stand out, but their factory look blends right in.

Made for your Silverado or Sierra

MTX engineers evaluate the "sonic signatures" of top-selling vehicles so they can design ThunderForms as custom acoustic matches. Each ThunderForm fits and blends inconspicuously into your vehicle, so you get great bass without losing any space. The enclosure curbs unwanted resonances from your sub, so you'll hear bass that's tight, hard-hitting, and way down low.

Fits under the rear seat

This rugged MTX ThunderForm comes loaded with a premium-quality 10" Terminator subwoofer, and mounts under the driver side rear seat of your Silverado or Sierra Extended Cab. The enclosure is seamless and airtight, with the correct internal volume to yield optimum bass response from the subwoofer. 

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Product highlights:

  • custom-fit subwoofer
  • black MDF enclosure with aviation-grade carpet cover
  • fits under the driver side rear seat
  • one 10" 4-ohm Terminator subwoofer
  • power handling: 250 watts RMS
  • frequency response: 39-150 Hz
  • sensitivity: 90.7 dB
  • 16-3/8"H x 20-3/4"W x 8"D
  • warranty: 2 years
  • Our 60-day money-back guarantee
  • MFR # C1500EX-07L
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