Amp/Preamp Asylum

RE: 16 ohms is the key to getting all amps to sound smoother and more detailed

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Sunya

In Reply to: RE: 16 ohms is the key to getting all amps to sound smoother and more detailed posted by Ralph on August 03, 2016 at 09:20:21

Aren't speakers voltage driven? Speaker manufacturers quote the voltage sensitivity, not the power sensitivity. While the power of a transistor amp into 16 Ohm will drop, its voltage swing will not.

A 16 Ohm speaker will have 3dB less voltage sensitivity though vs an 8 Ohm one.

Follow Ups:

RE: 16 ohms is the key to getting all amps to sound smoother and more detailed - pistonengine08 06:09:33 08/05/16 (0)
Well a speaker's excursion is proportional to current, not voltage. Current and voltage are also proportional - but there's some nuance. If you connect a low impedance load to a voltage source that can't supply the current at the designated voltage, the voltage will drop to match the current it can supply (or perhaps your source will fry or catch fire).

How that relates to matching amps and loudspeakers, a bit above my pay grade.
Sentivity is 2.83V/1 meter; efficiency is 1 watt/1 meter. - Ralph 13:22:21 08/03/16 (0)
They are the same if the load is 8 ohms.

If 2.83V into the load:

4 ohms is 2 watts
16 ohms is 1/2 watt

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