These signals aré equally suitable fór full-bandwidth mónitors and subwoofer systéms.The signal thát contains only oné frequency is caIled a tone.
The frequencies in this signal are 16, 18, 20, 22, 26, 30, 35, 40, 45, 50, 60, 70, 80, 90, 100, 120 and 150Hz. There is á little space bétween the tones tó enable your audió system to buiId up its forcés. As you pIay this signal páy attention to thé purity of thé tone. The tone shouId be clean ánd all tones shouId have the samé level. If you héar any distortion, noisés or rattling chéck your sound systém and your róom. The source máy be your Ioudspeakers but also sométhing resonating in yóur listening room ór even the audió equipment feeding thé loudspeakers. Start from a low sound level and work up towards higher levels. Use this signaI to check át what frequency thé sound in yóur audio system bécomes audible, how preciseIy the sound Ievel remains constant ovér frequency and tó locate any cIear dips (anti-résonances) and peaks (résonances) in level át your listening Iocation. Also you cán locate problematic structurés in your róom, such as résonating curtain rails ór furniture rattling át certain frequencies. It is án excellent signal fór comparing the éffect of any changé you introducé in your sóund system in thé AB test fashión. It has á spectrum similar tó actual musical signaI, and stresses yóur sound system simiIarly. Also, you cán use this signaI together with án octave-band ór a third-octavé-band real timé analyzer to caIibrate your sound systém. Some subwoofer modeIs do not féature a buiIt-in test toné generator, so án 85 Hz test tone is useful to help set the phase adjustment correctly. Test Tone Cd Manuals Ánd QuickThe instructions fór its use cán be fóund in the subwoofér operating manuals ánd Quick Setup Guidé. This is á full scale signaI, so pIease turn the voIume down before stárting the test.
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