Room Acoustics & Placement
Placement, modes, and sub integration — free upgrades first
Graded picks
The sortable spec plates for room acoustics & placement land as the database seeds. Meanwhile the Room Matcher already routes this category by room size and budget.
Specs, decoded
Crossover Frequency
The handoff point where the subwoofer takes over from the speakers — 80Hz is the convention.
Crossover Slope
How steeply a crossover fades each driver out, in dB per octave.
Room Gain
The free low-bass boost small rooms add below their lowest mode.
Room Mode
Dimension-locked bass peaks and nulls; the room’s own resonances.
Standing Wave
The physics behind room modes: a wave reinforcing itself between parallel walls.
Listening Triangle
The equilateral setup rule: speaker spacing = distance to each ear.
Toe-In
Angling speakers so their tweeter axes aim at your ears.
SPL
Sound pressure level in dB — anchored to real sounds, or it means nothing.
Reference Level
The calibrated loudness convention mixes are checked at — around 85dB.
Room Acoustics & Placement — questions
Is 80Hz always the right crossover setting?
It is the right starting point, not the right answer. 80Hz keeps the sub unlocatable and unloads small woofers — the convention THX popularized. Move it up (100–120Hz) for small satellites that strain below 100Hz; move it down (60Hz) only for towers with genuine low-frequency capability. Then verify by ear with a bass sweep: you should not be able to point at the sub with your eyes closed.
How loud is 85dB, and is it safe for long sessions?
It is roughly city-traffic loud — the level mix engineers use as a reference anchor. Occupational guidance (NIOSH) treats 85dB as the threshold where exposure time starts to matter: hours at that level add up, and every +3dB halves the recommended exposure time. Practical translation for listeners: enjoy loud passages, but let the average sit lower, take breaks, and use a phone SPL app for a reality check. We frame this carefully on purpose — hearing does not regenerate.
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