Corvette C3 1968-1977 Rear Bass Speakers

Where Classic Styling Meets Modern Audio Engineering.

Our rear bass speaker enclosures are precision-designed for 1968–1977 Corvette C3, delivering a vehicle-specific fit that integrates seamlessly into the factory interior. 

Each enclosure is acoustically engineered with an optimized internal volume of over 3.5 liters, allowing the recommended driver to produce deep, controlled bass beginning at ~30 Hz (see frequency response chart).

No drilling, cutting, or permanent modifications are required.

Have a question? Feel free to give us a call or send us an email, we're always happy to help.

Important: Every enclosure is custom made to order and built to fit your specific vehicle. Allow 4–8 weeks for production and delivery. After placing your order, we will contact you to request photos of your trunk before manufacturing begins — this ensures a precise fit. You will receive an update when your order enters production.

May not fit Convertible C3 Corvettes . Please contact us before ordering if you have a convertible.

Complete your audio upgrade with our custom amplifier mounting bracket for the Corvette C3. Designed to fit in the rear storage compartment, it delivers a clean, hidden installation with no permanent modifications.

Shell Only

The enclosure shell arrives glued and ready for your finishing touch. Sand, prime, paint, and assemble to match your unique interior. Ideal for builders who want full control over the final look.

Required components (not included): Dayton Audio RS225-4 8" Reference Woofer, acoustic polyfill (polyester fiberfill or wool), wires, etc.

Fully Assembled

Complete speaker system with driver installed and ready to drop in. Available in painted Black or Primed for custom color matching — because no two C3 interiors are exactly alike.

Custom Driver Upgrade

Want to run a specific aftermarket driver? We offer a custom fitment option for drivers that meet the acoustic/dimensional requirements of the enclosure. Not all drivers are compatible: deep bass performance depends on driver specifications. Contact us before ordering to confirm fitment. We'll work with you to find the right match.

Technical Specifications

• Dimensions: 900 × 500 × 200 mm (35.4 × 19.7 × 7.9 in)
• Weight: Approximately 6.6 lb (3 kg) for the enclosure, or 13.2 lb (6 kg) fully assembled with the recommended speaker.
• Internal enclosure volume: 3.5+ liters (0.12+ ft³), acoustically optimized for deep bass performance
• Recommended driver: Dayton Audio RS225-4 8" Reference Woofer (160 W RMS, 4 Ω)
• Recommended amplifier: 120 W RMS or greater per channel @ 4 Ω
• Frequency response: Engineered to deliver usable bass starting at approximately 30 Hz (see frequency response chart)
• Material: High-strength PETG
• Construction: Precision 3D-printed with reinforced wall structure
• Vehicle fitment: Designed from high-resolution 3D scans of the 1968–1977 Corvette C3 interior
• Installation: No drilling, cutting, or permanent modifications required
• Installation time: Approximately 2 hours per side
• Sold individually: Specify Left or Right

Features

• OEM-inspired appearance that preserves the original C3 interior
• Hidden installation with a precision, vehicle-specific fit
• Powerful low-frequency response beginning around 30 Hz
• 3.5+ L enclosure volume optimized for the Dayton RS225-4
• Precision fit developed from high-resolution 3D vehicle scans
• Premium PETG construction for long-term durability and heat resistance
• No permanent modifications required
• Compatible with factory or aftermarket head units and amplifiers
• DSP tuning is strongly recommended to achieve the best possible sound quality and frequency response
• Hand-built to order for your specific Corvette