SQR Audio Delta Series - Behind-the-Seat Subwoofer Enclosure
SQR Audio Delta Series - Behind-the-Seat Subwoofer Enclosure
The SQR Audio Delta Solution
Made to order - current lead time 3-4 weeks.
FREE SHIPPING in the Continental United States - Subwoofer must be purchased separately HERE.
Deep Bass. Zero Compromise.
Hand-Built in Springfield, MO.
The Delta Line isn’t just an enclosure; it’s a complete acoustic transformation for the 1973–1987 Squarebody Regular Cab. We’ve engineered away the "Squarebody Struggle," delivering massive output without sacrificing a single click of your seat travel.
🚨 Limited Release: Friday, April 3rd
To maintain our "No Shortcuts" standard, we are accepting only 5 orders for this run.
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Lead Time: 2–6 weeks (based on queue position).
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Future Drops: Availability and pricing will be re-evaluated after these 5 slots are filled.
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[Secure your spot early—ordering pauses once the queue is full.]
Why It’s a Solution, Not a Box
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The Space: Precision-contoured to the 73–87 cab geometry. Gain deep, full-range bass while maintaining full legroom and comfort.
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The Install: Integrated Magnetic Lock System (6–10 Neodymium points). Snaps to the cab wall for a rock-solid, zero-drill installation.
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The Aesthetic: Fully modular. Start with a single enclosure or expand to a Full Back Wall Filler for a seamless, factory-custom finish.
Overbuilt by Design
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Hybrid Chassis: 1" MDF baffles for a rigid mounting surface paired with 5/8" high-density walls.
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Industrial Assembly: CNC-cut joints, high-strength wood glue, and pocket hole/ countersink-screwed for a lifetime mechanical bond.
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Anti-Flex Bracing: Internal structural bracing eliminates "box ballooning" and distortion.
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Pro Connectivity: Dayton Audio BPA-38G 24kt gold-plated binding posts for airtight, high-current signal.
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Granotone Armor: Finished in Granitone Speaker Paint—a rugged, scratch-resistant textured black shell.
The Delta Line: Scalable Performance
Defined by width, weight, and volume, we offer four precision-tuned tiers to match your specific output goals.
| Model | Width | Weight (Bare) | Gross Volume | |
| Delta .50 | 24" | 23.9 lbs | 0.54 cu ft | |
| Delta .75 | 32" | 28.6 lbs | 0.82 cu ft | |
| Delta 1.0 | 40" | 33.4 lbs | 1.02 cu ft | |
| Delta 1.25 | 48" | 38.2 lbs | 1.26 cu ft |
Precision-Fit Driver Variants
We offer custom-baffled versions for the industry's top-tier shallow and thin-mount drivers:
Subwoofer Enclosure Options
| Brand | Driver Model | Driver | Enclosure Size |
| JL Audio | 10TW3 (10") | Qty 1 | Delta .5 |
| JL Audio | 10TW3 (10") | Qty 2 | Delta 1.25 |
| JL Audio | 13TW5V2 (13.5") | Qty 1 | Delta .75 |
| Hertz | MPS 250 S2 (10") | Qty 1 | Delta .5 |
| Hertz | MPS 250 S2 (10") | Qty 2 | Delta 1.25 |
| Hertz | MPS 300 S2 (12") | Qty 1 | Delta .75 |
| Kicker | 46L7T8 (8") | Qty 2 | Delta .75 |
| Kicker | 46L7T8 (8") | Qty 4 | Delta 1.25 |
| Kicker | 46L7T10 (10") | Qty 1 | Delta .5 |
| Kicker | 46L7T10 (10") | Qty 1 | Delta .75 |
| Kicker | 46L7T10 (10") | Qty 2 | Delta 1.25 |
| Rockford | T1S2-10 (10") | Qty 1 | Delta .5 |
| Rockford | T1S2-10 (10") | Qty 2 | Delta 1.25 |
| Rockford | T1S2-12 (12") | Qty 1 | Delta 1.0 |
| Other | Custom | — | Contact to discuss |
Modular Configuration: Your Cab, Your Way
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Tier 1: Single or Dual Sub Enclosures.
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Tier 2: Add matching Side Boxes or Panels for integrated amp mounting and storage.
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Tier 3: The Full Back Wall Filler. Combines the Delta Box, Side Panels, and Corner Panels for a gap-free, edge-to-edge masterpiece.
Join the SQR Audio Community
Follow @slammin_86 on Instagram or join our Facebook group: SQR AUDIO: 73-87 Squarebody C10 Audio Install & Builds for development updates and prototype photos.