Enclosure Quick-Design Card

[VISUAL PLACEHOLDER: EnclosureQuickDesign_Card.png] Description: Card showing: Qts → enclosure type recommendation table; volume formula for both sealed and ported; port length nomograph for common configurations

ENCLOSURE TYPE BY Qts

Qts < 0.30   → Ported or bandpass (driver needs enclosure loading)
Qts 0.30–0.50 → Ported optimal; sealed acceptable
Qts 0.50–0.70 → Either; sealed gives tighter sound
Qts 0.70–1.0  → Sealed preferred
Qts > 1.0    → Sealed only; small box

SEALED BOX VOLUME
Target Qtc = 0.707: Vb = Vas × Qts² / (0.707² – Qts²)
                    (when Qts < 0.5 only)
Quick estimate: Vb = 0.6 to 1.0 × Vas

PORTED BOX VOLUME  
Vb = 1.5 to 2.5 × Vas
Tuning: Fb = 0.7 to 1.0 × Fs

END OF CHAPTER 9

Chapter 9 Statistics: - Word count: ~4,100 words - Page equivalent: ~8 pages (expands significantly with actual visuals — this chapter is heavily diagram-dependent) - Visual placeholders: 36 identified (the most of any chapter — this is the visual reference chapter) - Sections: 6 of 6 complete ✅ - Note: This chapter grows substantially when visuals are produced — the text describes and explains; the diagrams carry the reference information