Testing speakers’ low frequency response

Use the LFSineTones file here to test for resonances in your monitoring setup. These resonances may come from the speaker itself (especially if it has a port) or from its mounting setup. Listen for any furniture humming along. Place a finger on your mounting hardware to feel if there are any obvious vibrations.1 This chart, copied from page 25, shows which frequencies happen at which timestamps.

Time Frequency Pitch
0:00 24Hz F
0:01 25Hz F#
0:02 26Hz G
0:03 27Hz G#
0:04 28Hz A
0:05 29Hz A#
0:06 31Hz B
0:07 33Hz C
0:09 35Hz C#
0:10 37Hz D
0:11 39Hz D#
0:12 41Hz E
0:13 44Hz F
0:14 47Hz F#
0:15 49Hz G
0:16 52Hz G#
0:17 55Hz A
0:18 59Hz A#
0:19 62Hz B
0:20 65Hz C
0:22 69Hz C#
0:23 73Hz D
0:24 77Hz D#
0:25 82Hz E
0:26 87Hz F
0:27 92Hz F#
0:28 98Hz G
0:29 105Hz G#
0:30 111Hz A
0:31 117Hz A#
0:32 123Hz B
0:33 131Hz C
0:35 139Hz C#
0:36 147Hz D
0:37 156Hz D#
0:38 165Hz E
0:39 175Hz F
0:40 185Hz F#
0:41 196Hz G
0:42 208Hz G#
0:43 220Hz A
0:44 233Hz A#
0:45 247Hz B
0:46 262Hz C

Ported speakers often have bass resonances by virtue of their port.2 I think of guitar sound holes as a way of relating this. More about ports here.

  1. Mixing Secrets for the Small Studio pg. 12 ↩

  2. Mixing Secrets for the Small Studio pg. 7 ↩

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