LM3876 newbie question

david90 · 15th July 2005, 02:11 PM

what is the max voltage I can input into the chip? My stock head unit put out 15w/chan so would I need to lower the powe before I input it into the chip?

Car amplifiers amplify by increasing the amplitude or the current to the speaker for more wattage? Since p=vi, u can increase either to get more wattage?

slackman · 15th July 2005, 02:17 PM

RTFDS !
(Read The ******** Data Sheet)

LM3876 Datasheet

Michael

DonoMan · 15th July 2005, 02:20 PM

At 4 ohms (what output the HU is rated at, not what your speakers are), that's about 8 volts. At 10 ohms, that's about 12 volts. Just make sure to set your gain on the amp accordingly low and it should work fine.

david90 · 17th July 2005, 04:23 PM

i don't get it. how did you get 8 and 10 volt and what do they repressent? I know what voltage is.

15th July 2005, 02:11 PM	#1
david90 diyAudio Member Join Date: Jul 2004 Location: ca	LM3876 newbie question what is the max voltage I can input into the chip? My stock head unit put out 15w/chan so would I need to lower the powe before I input it into the chip? Car amplifiers amplify by increasing the amplitude or the current to the speaker for more wattage? Since p=vi, u can increase either to get more wattage?

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15th July 2005, 02:17 PM	#2
slackman diyAudio Member Join Date: Mar 2005 Location: Germany, lower saxonny (Bremervörde)	RTFDS ! (Read The ******** Data Sheet) LM3876 Datasheet Michael

15th July 2005, 02:20 PM	#3
DonoMan diyAudio Member Join Date: Feb 2005 Location: Massachusetts	At 4 ohms (what output the HU is rated at, not what your speakers are), that's about 8 volts. At 10 ohms, that's about 12 volts. Just make sure to set your gain on the amp accordingly low and it should work fine.

17th July 2005, 04:23 PM	#4
david90 diyAudio Member Join Date: Jul 2004 Location: ca	i don't get it. how did you get 8 and 10 volt and what do they repressent? I know what voltage is.

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