Seventour 12" Subwoofer Dual 4Ω Shallow-Mount — 800W RMS Deep Bass, 7.09" Install Depth

The Seventour 12" dual 4-ohm shallow-mount subwoofer delivers deep low-frequency output with 800W RMS (1400W peak) and a compact 7.09" install depth for tighter vehicle installations.

Designed for drivers who want strong bass without a large enclosure, this Seventour 12-inch subwoofer balances power, size and build features. It uses dual 40-ounce magnets and a dual voice coil configuration to give flexible wiring options and reliable cone control. The speaker’s foam surround and a frequency range that reaches down to 25 Hz help it reproduce low notes clearly while fitting in many trunks, under-seats, or shallow boxes.

How powerful is this subwoofer and what does that mean for listening?

The Seventour 12" is rated at 800W RMS and 1400W peak, indicating it can handle sustained power typical of aftermarket car amplifiers and tolerate brief power spikes. Sensitivity is 84.7 dB, so it needs a proper amplifier to reach loud listening levels. Frequency response spans 25–300 Hz, which covers the bass frequencies most music and movies require.

• RMS power: 800W for continuous operation
• Peak power: 1400W for short bursts
• Sensitivity: 84.7 dB — use a matched amp for best results
• Frequency response: 25–300 Hz for deep bass and punch

What installation constraints should I expect with this shallow-mount design?

This subwoofer is a shallow-mount model with a recommended installation depth of 7.09", making it suitable for compact enclosures and limited space installations. The mounting dimensions are optimized for many vehicle trunks and custom boxes, but measuring your installation area is still important. The dual 4-ohm voice coils provide wiring flexibility for series/parallel connections to fit amplifier impedance requirements.

• Recommended depth: 7.09" — good for tight spaces
• Shallow basket design fits many compact enclosures
• Dual 4Ω voice coils for flexible wiring options
• Measure mounting hole and depth before purchase

Which build features improve performance and reliability?

Seventour equipped this woofer with two 40 oz high-strength magnets and a robust cone/surround system to control excursion and maintain sound quality at higher output. The foam surround offers a balance of compliance and durability for typical automotive conditions. These components work together to reduce distortion while allowing the subwoofer to move air for impactful bass.

• Dual 40 oz magnets for consistent magnetic flux
• Dual voice coils for amplifier matching and wiring options
• Foam surround for controlled cone movement
• Sturdy basket and spider for reliable operation

How should I match this subwoofer with an amplifier and enclosure?

To get the best results, pair the sub with an amplifier that can reliably supply near its RMS rating at the intended impedance. For enclosure, sealed boxes emphasize tight, accurate bass while ported enclosures increase low-frequency output; the shallow mount opens more enclosure placement options. Always follow impedance and power-handling guidelines to protect both subwoofer and amp.

• Match amplifier RMS output to 800W at chosen wiring impedance
• Choose sealed for accuracy, ported for louder low end
• Use proper wiring: series or parallel to reach amp impedance
• Secure mounting and adequate ventilation for reliability

Who is this for: The Seventour 12" dual 4-ohm shallow subwoofer is aimed at car audio enthusiasts who want substantial bass without sacrificing trunk space. It's a good pick for custom installs, compact enclosures, and systems where flexibility in amplifier wiring is important. If you need deep, punchy low frequencies from a sub that fits tighter spaces, this model is built to meet those needs while offering professional-style power handling and component design.