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Equipment with output power selection In lots of computer systems there is a key that permits you to lower the power by half: for instance, from 100 to 50 watts or 50 to 25 watts. However that halving in power just produces 3 d, B decrease in sound pressure, that is, in the volume we perceive.

This suggests that lower powered devices with more delicate speakers might sound louder than higher powered equipment. By decreasing the power in half and the number of speakers in half we can reduce 6d, B, however there is going to be some tonal sacrifice. The truth is that due to the logarithmic quality of the ear, to lower the volume by half you have to lower 10d, B.

And sometimes the decrease requirement can be even greater, for example 20 or 30d, B. This respectively equals 1 watts and 0. 1 watts. Every 10d, B of attenuation we must move the comma one position in the power of the devices. Resistive attenuators There are resistive attenuators that are sandwiched between the output of the equipment and the speaker box to reduce the power delivered to the speaker.

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Let's consider that in a 100 watt device, 90 watts are dissipated at the attenuator and 10 watts reach the speaker. If we take the attenuation to 20d, B, then 99 watts are dissipated in the attenuator and 1 watts in the speaker. This has many consequences because the impedance of the speaker is not the very same at all frequencies.

That is what produces th. However on the other hand, in some cases, it is the speaker itself that produces certain harmonics by taking it to its mechanical and/ or magnetic limitations, as holds true with the Alnico Blue. In these cases, using attenuators in between the equipment and the speaker does not work.

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For this acoustic insulation boxes https://boutiquetone.com are used. Acoustic insulation boxes These boxes are sealed and with a great deal of absorbent product and the speakers and microphones are set up within. The impact of being a small and sealed space triggers the SPL to increase disproportionately which chokes the speaker and at the same time threatens of exceeding the limitations of the microphone and might even break it.

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Attenuators with speaker reaction simulation Other attenuators attempt to replicate the response of the speaker utilizing just the part of the motor without a cone, with the intent of keeping the load on the output phase but not producing sound, however it does not work the like a speaker since it is the cone itself that figures out most of the frequency action.

The guitar amp attenuator is the option? If what we want is to tape-record the real noise of a power stage and required speakers, we should bring those parts to the point of need, avoiding the drowning of the speaker and the mic, and for this the best thing is a room committed to miking the boxes.