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Old 15th May 2011, 03:33 PM   #1
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Default Need help with mono LM4702 Amp

I already built an stereo LM4702 amp for my main speakers and i love the sound quality. I want to build one for my subwoofer. If i want to build just one channel can i leave the (comp,sink,source,+,- pins) for the unused channel on the lm4702 floating or do they need to be shorted to ground or something.
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Old 18th May 2011, 08:13 PM   #2
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anybody??
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Old 19th May 2011, 12:41 AM   #3
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As this will be for subwoofer use, maybe you can consider using both channels in bridged mode for more power?
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Old 8th July 2011, 08:42 AM   #4
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Hi, do you perhaps have the schematic for the amp you built, i would like to build one.
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Old 17th July 2011, 01:35 PM   #5
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benproiii, id really like to see pictures and schematic from your project. Thanks
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Old 17th July 2011, 05:52 PM   #6
gootee is offline gootee  United States
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For opamps that are unity-gain stable, the standard procedure for an unused one in a dual package is to connect the output to the negative input and then ground the positive input.

But the LM4702 is apparently NOT unity-gain stable. You could probably wire the unused one with components like in Figure 1 on page 10 of the datasheet, but connect its input to ground.
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