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LNGR SPKRHIFI. TWO WAYS. HANDCRAFTED.
LNGR SUB-12.4SIMULATION · P2

Four twelves. 350 litres.

Four GRS 12SW-4HE drivers in roughly 350 L net with a folded bass-reflex port and a model tuning around 20 Hz.

IDEA
SIMULATION
BUILD
MEASUREMENT
FINAL
Concept rendering of a shallow subwoofer with four 12-inch drivers and a central reflex portEntwurf nach Vorgabe von Flo
Design concept. CAD and PDF dimensions remain authoritative.
StatusSIMULATION / P2
Drivers4× GRS 12SW-4HE
Net target≈ 350 L
Outer size2337 × 500 × 400 mm
Model tuning≈ 20 Hz
Port300 cm² · internally folded

P2 planning state

LNGR SUB-12.4 replaces the old two-18PT preview. Four GRS 12SW-4HE drivers work in roughly 350 L net and the central port is folded because of the shallow cabinet.

Understand the decisions behind the project

These learning pages explain the principles behind the documented planning. The recorded project status remains the reference for what has actually been built and measured.

Voltage and current →Verify with measurements →