— Calculator presets · 11 configurations
Typology library — start from a scenario, end at a brief.
Each preset is a hand-curated configuration of one of the engineering calculators — a real, defensible scenario type with the inputs already filled in and the engineering reasoning written out. Open a preset to read the problem statement, the answer, the deliberate caveats, then adjust the live calculator. The URL stays shareable.
AV · Audio · Coverage
Speaker Coverage Planner
Speaker Coverage · Hospitality
Hotel lobby — background music, 20 × 12 m
A premium hotel lobby needs even, conversation-friendly background audio at 70–75 dB without ceiling speakers that visibly puncture the architecture.
Open presetSpeaker Coverage · Auditorium
300-seat conference auditorium — speech-priority line array
A 300-seat corporate auditorium needs 85 dB of intelligible speech at the rear row with even SPL across the seating bowl and minimal visual impact.
Open presetSpeaker Coverage · House of Worship
500-capacity house of worship — touring-grade headroom
A 500-capacity worship space needs 90 dB of headroom for music programme plus speech, even coverage across pews and a system that won't be the visual subject.
Open presetAV · Projection
Projector Throw Calculator
Projector Throw · Home Cinema
Home theatre — 120-inch 16:9 screen, 4 m room
A dedicated home theatre with 4 m of throw distance needs a projector that hits a 120-inch 16:9 screen without zoom at the optical limit.
Open presetProjector Throw · Corporate AV
Boardroom — 100-inch 16:10 screen, ceiling mount
A corporate boardroom with a 100-inch 16:10 screen and a ceiling-mount throw of 3 m needs a projector specified for daytime ambient lighting.
Open presetLED Wall · Hospitality Lobby
Hotel lobby video wall — 4 × 2 m, 2.5 mm pitch
A premium hotel lobby wants a 4 × 2 m video wall for brand storytelling viewable from 4–8 m as guests circulate.
Open presetLED Wall · Corporate Stage
Conference stage backdrop — 6 × 3 m, 2.6 mm pitch
A 6 × 3 m stage backdrop for hybrid conferences needs to read clearly on stage and on broadcast camera without moiré.
Open presetELV · Surveillance · Storage
CCTV Storage Retention Calculator
CCTV Storage · Retail
Retail store — 16 cameras, 30-day retention
A retail store with 16 4MP H.265 cameras needs 30 days of continuous recording for loss-prevention and incident review.
Open presetCCTV Storage · Industrial
Manufacturing facility — 32 cameras, 90-day retention
A manufacturing facility with 32 cameras at 5MP H.265 needs 90-day continuous retention for safety-incident review and process audit.
Open presetIT · Cabling
Structured Cabling Estimator
Structured Cabling · Office
Corporate office — 50 Cat6A drops, single floor
A 50-seat single-floor office needs a Cat6A drop per desk plus AP and CCTV terminations, terminating to one rack.
Open presetStructured Cabling · Hospitality
Mid-scale hotel — 200 drops across 5 floors
A 5-floor 80-room hotel needs Cat6A drops for guest-room TV / IPTV + Wi-Fi + housekeeping handheld, plus public-area AP and CCTV, terminating to per-floor IDFs.
Open preset· Don't see your scenario?
Send the brief — we'll add the preset.
Each preset is a typology starting point we've encountered often enough to write up. New typologies are added in editorial batches; if your project doesn't match any of the configurations above, send the brief and we'll write the engineering response directly.