12" 350 Watt RMS Dual 4 Ohm Car Audio Subwoofer Massive Audio GTS12

• Only 3.24" mounting depth, perfect for trucks, sedans, and slim custom boxes
• Powerful 3" dual 4 ohm high-temp voice coil handles 350W RMS and 600W peak
• Durable injection-molded PP cone and pressed foam surround for controlled bass output
• High flux Y35 50oz strontium ferrite magnet delivers tight and punchy low-end response
• Versatile for sealed or ported enclosures with performance-focused tuning flexibility

12" 350 Watt RMS Dual 4 Ohm Car Audio Subwoofer Massive Audio GTS12

This listing includes:

• (1) Massive Audio GTS12 12" Shallow Mount Subwoofer, Dual 4 Ohm, 350W RMS

The Massive Audio GTS12 is a shallow-mount 12" subwoofer designed to bring thunderous bass to vehicles where space is limited. With a mounting depth of just 3.24 inches, this sub is ideal for trucks, sedans, or custom installs that require slim enclosures without sacrificing output or clarity.

Specifications:

• Speaker Size: 12"


• RMS Power Handling: 350W


• Peak Power Handling: 600W


• Impedance: Dual 4 Ohm


• Voice Coil Size: 3" High-Temp EISV


• Cone Material: Injection-Molded Polypropylene (PP)


• Surround: Pressed Foam


• Magnet: Y35 Strontium Ferrite (50oz)


• Basket: Heavy Gauge Steel with Industrial Texture


• Terminals: Gold-Plated Push Pin


• Tinsel Leads: Poly-Cotton Spider with Woven Round Tinsel Leads


• Mounting Depth: 3.24"


• Mounting Diameter (Outer): 12.3"


• Mounting Cutout Diameter: 10.57"


• Net Weight: 10.8 lbs


• Displacement: 0.08 ft


• X-Max: 9mm


• SPL: 84.62 dB


• Fs (Free Air Resonance): 31.74 Hz

Enclosure Recommendations:

Sealed Box

• Small: 0.62 ft


• Large: 1.2 ft


• F3: 44 Hz (small), 38.4 Hz (large)

Ported Box

• Volume: 0.85–1.5 ft


• Internal Dimensions: 15" (H) x 13.5" (D) x 8.2" (W)


• Port Size: 2.75" x 5.5" Round


• Fb: 38 Hz


• F3: 34 Hz

Dual Sub Ported

• Volume: 1.8–2.4 ft


• Internal Dimensions: 27.8" x 13.5" x 7.5"


• Port Area: 5.94 in


• Port Length: 9.7"


• F3: 39 Hz

Package Dimensions:

• Length: 13.5"


• Width: 13.5"


• Height: 7"


• Package Weight: 12 lbs

The GTS12 proves that shallow doesn’t mean small. Whether sealed or ported, this subwoofer offers deep, clean bass that hits hard and stays cool.

Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

• Visa
• Mastercard
• American Express
• Discover
• Diners Club

Digital Wallets

• Amazon Pay
• Apple Pay
• Meta Pay (formerly Facebook Pay)
• Google Pay
• Shop Pay
• PayPal

International Payment Methods

• Bancontact
• iDEAL

Bank Transfers

• Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

• Klarna
• Affirm
• Sezzle
• Snap
• Acima
• Tiptop

If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

• Standard Shipping: Free for orders over $100.
• Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

• Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
• Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

If you're having trouble tracking your order:

• Make sure you’ve received the shipping confirmation email with the tracking number.
• Log into your account on our website and use the “Check Your Order Status” button.
• If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.