what is compression

[nauc 10+ year member]

what is happening. is it referring to dynamics or what

thanks

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[bubbagumper6 5,000+ posts]

yes

 

[keep_hope_alive Premium Member]

What is "power compression"? Speaker voice coils are made of copper or aluminum. As these voice coils increase in temperature during normal operation, the DC resistance of the voice coil increases. Greater voice coil resistance means less power transfer from the amplifier. As a result, the speaker will not play as loud when it's "warmed up" as it did when it was "cold". Some speakers may exhibit 3 to 6 dB of power compression.

this is why thermal management is important. vented voice coils and heat sinks are common nowadays.

there are other forms of compression, such as what happens in a horn when the throat area is smaller than the diaphragm area.

 

[mpowered325is 10+ year member]

intake, COMPRESSION, power, exhaust.