🔧 INSTALLER LEVEL: Building for Sound Quality

Component Selection for SQ

Philosophy: Quality over power. A 50W RMS tweeter that costs $200 beats a 200W tweeter that costs $50.

Recommended SQ drivers by tier:

Entry SQ ($500-1500 for full front stage): - Morel Maximo 6 — 6.5" component set, $300 - Focal PS-165F3 — 6.5" 3-way, $500 - Hertz MPK-165.3 — 6.5" 3-way, $400

Mid-tier SQ ($1500-4000): - Scan-Speak Classic/Revelator — build custom 2-way or 3-way, $1500+ - Focal Utopia Be — 6.5" component, $2000 - Audison Prima/Thesis — modular component systems, $1800+

Reference SQ ($4000+): - Dynaudio Esotar² — Reference-grade raw drivers, $3000+ - Accuton C25 — Ceramic drivers, $2500+ - Seas Excel — build custom 3-way active, $2000+

Subwoofer for SQ:

• Sealed enclosure mandatory (tight, accurate, no port noise)
• Target Qtc: 0.707–0.85 (Butterworth to slight Chebyshev)
• Quality over size: 10" or 12" sealed is sufficient for SQ
• Example drivers: JL Audio W7, Focal Utopia Be, Morel Ultimo

Amplifiers for SQ:

• Low noise floor: SNR >105 dB
• Low distortion: THD <0.01% at rated power
• Clean power supply: No switching artifacts on signal
• Examples: Audison Thesis, Arc Audio, Helix, JL Audio Slash series

DSP for SQ:

• Helix DSP Pro — industry reference, $900
• Alpine PXA-H800 — OEM integration + processing, $1800
• miniDSP C-DSP 8×12 DL with Dirac Live, $650

Installation Techniques for SQ

Tweeter placement — the 60° rule:

Tweeters should be: - Aimed at the opposite ear (left tweeter aims at driver's right ear) - Roughly 60° off-axis from primary listening position - High and forward (dashboard, A-pillar, or sail panel)

Why? Human hearing is most sensitive to time-of-arrival differences in the 2-4 kHz range. Tweeters close to ears and aimed properly create precise imaging.

Dashboard mounting (best for imaging): - Custom pods fabricated to fit dashboard contours - Tweeter flush-mounted or slightly angled - Requires fabrication skills (fiberglass, vinyl wrap)

A-pillar mounting (easier, still excellent): - Pre-made pods available for popular vehicles - Tweeter fires at listener across windshield - Acceptable compromise vs dashboard

Midbass in doors:

• Dampen the door heavily (CLD tiles, closed-cell foam)
• Seal the door completely (make it a proper enclosure)
• Mount speaker with gasket (weatherstrip foam, no air leaks)
• Brace door panel to prevent flex

Wiring for SQ:

• Separate power and signal paths by 12"+ minimum
• Twisted pair speaker wire (reduces EMI pickup)
• High-quality RCA cables with good shielding
• Star ground — all grounds to single chassis point