Choose a built-in speaker by its condition at end of life, not day one. 24 real models compared by construction and power class, plus the 1.2x max-power rule ......
Diagnose burnt voice coils, amplifier shutdown and missing output in smart home drivers. Symptom map, DCR and RMS checks, fixes and replacement models ......
How rail voltage and load impedance set the power a driver actually receives. Load-line tables, power classes, the F0 voltage rule and duty-cycle sizing ......
Choose a small speaker driver by what the amplifier can deliver. 24 smart home drivers compared by impedance and power class, plus the F0 test-voltage rule ......
Thin sound, rattle, or output that drops when the housing closes? Symptom-to-cause tables for compact speakers, an eight-step checklist and models by fault. ......
How much back volume does a compact speaker need? Cavity targets by driver class, leak sensitivity under 2 cc, grille allowances and a POS case study ......
Compact is a volume budget, not a thickness target. 24 compact speaker models ranked by total displaced volume, plus test-box decoding, standards and FAQ ......
Symptom-to-cause maps for weak prompts, distortion, hiss, intercom echo and dead units, plus an 8-step diagnostic order for installed devices ......
Distance-to-SPL budget, F0 targets by device class, cavity design in thin panels, and always-on thermal reliability for smart home speakers ......
Voice prompt or intercom? Three acoustic jobs, five specs that decide it, 22 real smart home speaker models with SPL and F0, standards and FAQ ......