miniDSP Flex DL User Manual page 105

3/15/23, 9:46 AM
Guidelines for target curve design
Care should be taken to create a target curve that works well with your speakers and room, as well as suiting your
personal preferences. Small changes to the target curve can have signi cant effects on the tonal quality of the system,
so it is important that you experiment with different target curves.
If you initially don't achieve a satisfactory result, ensure that you have spread your measurements over a su ciently
large area and with su cient variation in height. The following guidelines will help you understand how to adjust your
target curve.
Low-frequency extension and boost
All loudspeakers have a natural low frequency roll off. Setting the target curve to boost the region below the speaker's
natural roll off frequency may result in overdriving the speakers, especially with smaller home loudspeakers and
depending on your listening habits. A system with capable subwoofers integrated into it, however, will support much
more low-frequency output.
High-frequency "tilt"
The target curve is the desired measured response of loudspeakers in a room, in contrast to measurements made of a
loudspeaker during its design under anechoic (measured in free space) conditions. While high-quality loudspeakers
are usually designed for a at on-axis anechoic response, these same speakers when placed into a listening room will
tend to have a downward-sloping or "tilting" response at high frequencies, due to the effects of limited dispersion at
high frequencies and greater acoustic absorption.
A completely at in-room response is therefore usually not desirable and will tend to sound thin or bright. Start with a
target curve that follows the natural behavior of your speakers in your room, and then experiment with greater or lesser
degrees of tilt in the treble region to obtain the most natural timbral balance.
Low-frequency adjustment
A completely at response at low frequencies, with complete elimination of peaks due to room modes, may sound
light in the bass. Typically, a slight increase in the target curve below 100 Hz will give a more balanced sound.
Magnitude response dips
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