Atmos Bubble and boom! Index measured, not opinion

47 Meters Down (2017)

BOOM 7.0 (with BEQ 7.4). Bass measured on the disc, DTS-HD MA 5.1. Directed by Johannes Roberts. Drama, Thriller, Adventure, Horror.

No channel-activity graph is published for this film,
so it carries a bass score only.
DEMO
needs both scores measured
Bubble
no channel graph published
Boom, as released
7.0 / 10
Boom with BEQ
7.4 / 10
Measured release
Disc · DTS-HD MA 5.1 · chart by aron7awol
Deep bass peak, 10–30 Hz
-21.7 dBFS · with BEQ -20.0
Depth, 10–20 vs 30–60 Hz
-2.1 dB · with BEQ -0.2
Average level, 10–30 Hz
-47.6 dBFS · with BEQ -45.9
Minutes of deep bass
25 min · with BEQ 26 min at ≥ −30 dBFS
Sub-bass warning
the disc peaks at -24.3 dBFS at 10 Hz — top of the field; mind ports and driver excursion
Tomatometer
53% · as of 10 Oct 2021
Metascore
52 / 100 · as of 9 Jan 2026
Chart scale read
-5 to -65.3 dBFS
Genres
Drama, Thriller, Adventure, Horror
Tags
drama, horror, thriller
Audio
DTS-HD MA 5.1, LPCM 5.1
Released
16 Jun 2017
First listed
4 Dec 2018
Sources
BEQ

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