I will answer the following questions about the differences in sound.
・Isn't the frequency response measured with a sine wave just one aspect of the sound?
・Do rigidity and materials have no effect on the sound?
・Complex brain interpretation
・Is the original sound not reproduced?
・What is a good sound?
・Do Vinyl record have more information than CDs?
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**Practice Questions**
1. Show the process by which the sound changes when the speaker cable is changed.
Sample answer:
Changing the speaker cable
→The amplifier's output resistance as seen from the SP terminal changes
→The voltage at the SP terminal is divided by the output resistance and the SP's IMP curve
→The frequency characteristics of the sound coming out of the SP changes
→The sound changes
Note that if the voltage division ratio is 1/10 or less (DF=10 or more), the change in frequency characteristics does not exceed the hearing limit (±3dB), so the sound does not change.
2. Show how changing the amplifier changes the sound.
Sample answer:
Changing the amplifier
→The amplifier's output resistance (DF) changes
→The amplifier's voltage is divided by the output resistance and the SP's IMP curve
→The frequency characteristics of the sound coming out of the SP changes
→The sound changes
Note that if the amplifier's DF is 10 or more, the change in frequency characteristics does not exceed the hearing limit (±3dB), so the sound does not change.
3. Show how the amplifier's load (SP) changes the sound.
Sample answer:
Change the load
→The impedance characteristics of the load change
→The amplifier voltage is divided by the output resistance and the speaker's IMP curve
→The frequency characteristics of the sound coming out of the speaker change
→The sound changes
Note that if the amplifier's DF is 10 or more, the change in frequency characteristics does not exceed the hearing limit (±3dB), so the sound does not change. The change in load from the amplifier's perspective is merely a change in the impedance curve, so the caliber and inertia of the diaphragm are not directly related.
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