wallbox speakers question

[fa001]

I have a dead DEC3 wallbox that I am thinking of restoring with an MP3 player.
From what documentation I can find the speakers are 28 ohm speakers.
My amp is looking for 4 ohm speakers. Will it work with these speakers?

[matsadona]

In general it is OK to have a speaker with higher resistance than rated at the amp, but not lower.

[fa001]

So my thinking now is that it is just a question of which does one want to stress the most. If the speaker is a high impedance then to get loud volume one has to turn the amp up which stresses the amp. If the speaker is low impedance then turning up the amp can stress the speaker.

Therefore it will "work" but one has to use some caution with the volume setting.

[Ken Layton]

The rule-of-thumb is the higher the impedance of the speaker, the higher the quality of sound. But higher impedance speakers need more amplifier wattage to get the same volume level. A higher impedance speaker will never hurt an amplifier designed for a lower impedance speaker. It's just that the volume won't be as loud.

The lower the speaker impedance, the greater the distortion in the sound. If you use an amplifier designed for 8 ohm speakers and connect 4 ohm speakers, the lower impedance will draw twice the current from the amplifier and at a greater distortion too.