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Why measure

What measuring tells you that listening can't.

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Why it matters

Listening matters, but it is not repeatable by itself.

A measurement gives you a record. It can show whether a crossover change helped, whether a port is tuned where expected, whether one driver is wired backward, or whether the room is causing a bass problem.

How it works

Measurement software sends a known signal and records the result with a microphone or electrical input. The software compares what went out with what came back.

Different measurements answer different questions. A nearfield woofer sweep checks bass behavior. A gated farfield measurement checks the speaker above room reflections. An impedance sweep can show box tuning and wiring faults.

Common mistakes

Simple example

Frequency response Frequency response shows how loud a speaker is at each frequency. It helps reveal balance, crossover behavior, box tuning, and room problems. Phase Phase describes timing between waveforms. Around a crossover, poor phase alignment can make two drivers cancel instead of sum. Tools: REW & mics Basic speaker measurement needs software, a measurement microphone, a way to play the test signal, and a repeatable setup. REW is a common free tool for this work. Weak bass Weak bass is often caused by polarity, placement, room nulls, level mismatch, leaks, or tuning problems. Check those before changing drivers.

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