13.5 Building a Competitive System on Budget

Entry-Level SPL (~145 dB for under $4000)

Subwoofers: 4× 12" competition drivers, $1200
Example: Skar Audio EVL-12 ($300 each)

Amplifier: Single mono amp, 5000W @ 1Ω, $800
Example: Taramps MD 5000.1

Enclosure: Ported, self-built MDF, tuned 50 Hz, $300 materials

Electrical: - 2× AGM batteries ($400) - 250A alternator ($550) - 0 AWG wiring kit ($150) - Distribution block and fuses ($100)

Total: $3,500 + labor

Expected result: 144–148 dB @ 50 Hz

Competitive level: Regional competitions, street class

Entry-Level SQ (Regional Wins for $3500)

Front stage: - Focal PS-165F3 3-way components, $500 - Dashboard tweeter pods, fabricated, $200 DIY

Subwoofer: - Single 10" sealed, JL Audio 10W3v3, $280 - Custom sealed enclosure, $150 materials

Amplifiers: - 4-channel for fronts, Arc Audio XDi 600.4, $500 - Mono for sub, JL Audio JX500/1D, $300

DSP: miniDSP C-DSP 6×8, $450

Sound deadening: 40 sq ft CLD + foam, $400

Installation materials: RCA cables, speaker wire, mounts, $200

Tuning: REW + UMIK-1, $75

Total: $3,055 + significant labor

Expected result: 75–85 point range (IASCA scoring)

Competitive level: Regional competitions, street stock class

END OF CHAPTER 13

Chapter 13 Statistics: - Word count: ~6,800 words - Page equivalent: ~14 pages - Sections: 6 of 6 complete ✅ - Three-tier structure throughout ✅ - Real-world examples and calculations ✅ - Competition-specific guidance ✅