Response Curves

 

The following graphs show the change in IEM frequency response spectrums with different filters, tips, and fits. These graphs are normalized, so keep in mind that there will be a loss in volume at the frequencies that are not being “boosted.” Use this data to choose your tuning kit configuration. Test the effect with the sample tracks.

 
 

Bass Boost

Bass Filters with Standard Tips

Start adjusting your bass response with the green acoustic filter. This filter leaves your IEM sound unchanged, but can get a better fit and seal. Sometimes this alone can provide a significant bass boost.

The red filter provides a moderate bass boost. This filter can be ideal for getting a little more bass presence or cutting down on sibilance in an overly sparkly IEM.

The black filter is for bass-heads and provides a huge boost to bass and sub bass.

Test out your bass response with this track from Thundercat:

Treble Boost

Treble-Boost Ear Tips

The treble-boost tips provide a moderate boost to frequencies above 10kHz. This is great for hearing every detail in a track. The treble-boost ear tips work by adding a small vent to shunt some volume from the bass and mid frequencies so that the highs shine through. This ear tip works well in combination with the neutral, green acoustic filter.

Listen for every note in this Ravel string quartet:

Mid Boost

Bass Filter + Treble Tip Combination

Combining the red acoustic filter with the treble-boost tip results in a prominent mid section while dampening both treble and bass. This is excellent for hearing vocals in a mix.

Listen for vocal presence in this track by Fleet Foxes:

 

V-Shape

V-shape Annotated.png

Purple Filters with Standard Tips

Use the purple filter for a “V-shaped” sound signature. This can create an exciting mix of thumping bass and detailed highs by reducing the mid frequencies in a mix. Compare with the flat response of the green filter.

Hear whether you like a flat or V-shaped signature better with “Hold On” from the Alabama Shakes:

 

Insertion Depth

Deep vs. Shallow Insertion

Insertion Depth is an often overlooked factor in how an IEM sounds. In general, deeper insertion into the ear canal makes an IEM sound bassier and can flatten unpleasant peaks in the treble region. This can be a tool to fix sibilance. Use smaller ear tips for a deeper insertion, and larger ear tips for a shallower insertion.

Listen for an even high end in this track by Jay Som: