anybody facing stability problems with LM3886 BA100 with 8 ohm subwoofer?

rhythmdiy · 30th October 2007, 07:06 PM

If I use a 10 inchwoofer with 8 ohms of impedance with two chips of LM3886 in BA100 mode then does the amps get too hot? any stability problems with the chips for driving the woofer soo hard..?

-ken

Minion · 31st October 2007, 06:04 PM

In Bridged mode there shouldn"t be any stability problems as long as you are useing a Low enough Voltage.....With an 8 Ohm speaker in Bridged mode each Chip is driveing a 4 ohm load so the Supply Voltage should be kept under +/-30v and a Big heatsink will also be good.....

I am building a Bass amp useing 2 LM3886 in Bridged mode with an Opamp inverter and a Huge heatsink running off of +/-26v rails and I am powering a 12 in Sub and a 10in Driver, I am also useing a 15 Band EQ I scavenged from a Busted Rane EQ for the Tone controlls....It is still a work in progress.....

Cheers

30th October 2007, 07:06 PM	#1
rhythmdiy diyAudio Member Join Date: Dec 2006	anybody facing stability problems with LM3886 BA100 with 8 ohm subwoofer? If I use a 10 inchwoofer with 8 ohms of impedance with two chips of LM3886 in BA100 mode then does the amps get too hot? any stability problems with the chips for driving the woofer soo hard..? -ken

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31st October 2007, 06:04 PM	#2
Minion diyAudio Member Join Date: May 2006	In Bridged mode there shouldn"t be any stability problems as long as you are useing a Low enough Voltage.....With an 8 Ohm speaker in Bridged mode each Chip is driveing a 4 ohm load so the Supply Voltage should be kept under +/-30v and a Big heatsink will also be good..... I am building a Bass amp useing 2 LM3886 in Bridged mode with an Opamp inverter and a Huge heatsink running off of +/-26v rails and I am powering a 12 in Sub and a 10in Driver, I am also useing a 15 Band EQ I scavenged from a Busted Rane EQ for the Tone controlls....It is still a work in progress..... Cheers

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