Orientation for the midrange:
Significant increases just below 400 Hz make the sound a bit softer but also make the sound less dynamic.
Boosts above 1,000 Hz tend to provide more pressure, more punch and a rather obtrusive, bright sound.
Female voices often have a fundamental note of just above 200 Hz. The vocal range with treble covers the range of about 150-13,000 Hz.
With valleys of 100-1,000 Hz, you can expect a speaker which emphasises on high frequencies. If this range on average significantly decreases, the speaker does not provide a full range sound. The speaker may not reproduce such a wide and warm sound as a viola or grand piano will do at a live performance.
The treble range in the frequency response (2,000-20,000 Hz)
When the high frequencies are high, the speaker emphasises instruments such as acoustic guitars, violins or parts of high-pitch voices. Strong peaks are particularly irritating between 2,000 Hz and 6,000 Hz which lets the speaker screech to a certain extent. The human ear is particularly sensitive to this range.
Orientation for the high range:
- If a speaker particularly emphasises on the high frequencies, it may provide a more metal sound.
- Too much relative power in the range around 3,000 Hz can result in a highly dynamically and somewhat agressive sound.
- With strong valleys in this range, the sound becomes muffled and undynamic or in the worst case, the speaker 'mumbles'.
- The range from 14,000 Hz on, however, can be neglected for backbround music applications.