On Sat, Aug 15, 2009 at 10:10:51PM +0200, Arnold Krille wrote: > For speakers you want the impedances to be about the same > so the efficiency is high. No. Power amps have very low output impedance, typically less than 0.1 ohm. Speakers are voltage-driven. They have to be for good damping. You can easily 'feel' the difference. Disconnect a speaker and gently tap the cone, you will feel it's 'soft', and it may even produce some low frequency tone. Now connect it to the amp and switch on the amp. The cone will feel quite 'hard'. What you feel now is the low impedance of the amp which allows it to control the movement of the cone - it makes the speaker resist any movement that is not driven by the amp. Ciao, -- FA Io lo dico sempre: l'Italia è troppo stretta e lunga. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
