What is room calibration and how does it work?
Room calibration is a feature used to adapt an audio system’s settings to speaker placement and room acoustics.
Many modern home cinema receivers have built-in automatic room calibration systems.
Examples include Audyssey, Dirac Live and YPAO.
How does room calibration work?
Automatic room calibration usually uses a microphone connected to the receiver.
The receiver plays test signals through the speakers and measures how sound is reproduced in the room.
The system can adjust various settings based on these measurements.
What can room calibration adjust?
Speaker distances and delay
The system can adjust when sound is sent to different speakers so that it reaches the listening position at the correct time.
Sound level
Volume can be adjusted individually to create a balanced soundstage.
Frequency response
Some systems use an equalizer to compensate for part of the room’s effect on the sound.
Crossover frequencies
Some systems can suggest or set how bass should be distributed between the speakers and subwoofer.
How do I run room calibration?
Position the speakers where they will be used.
Connect the calibration microphone according to the manufacturer’s instructions.
Place the microphone at the main listening position.
Make sure the room is as quiet as possible.
Follow the receiver’s instructions.
Check the results once measurement is complete.
Some systems require measurements at several positions around the listening position.
Can room calibration replace good speaker placement?
No.
Room calibration can improve sound reproduction, but it cannot fully compensate for unsuitable speaker placement or major acoustic problems.
It is therefore important to start with a well-planned installation.
Do I need to recalibrate the system?
It is advisable to run calibration again if you:
Move the speakers.
Replace speakers or the subwoofer.
Change the listening position.
Make major changes to the room’s furnishings or acoustics.
Tip: Always check the results after calibration. Automatic systems may sometimes suggest settings that need manual adjustment.