diyAudio Forums Archive > Top > Amplifiers > Chip Amps Bridge/parallel calculations?? - Click HERE for Original Thread JDeV Can somebody please post formula for calculating the max. out power (at various supply voltage levels) of a bridge/parallel combination using LM4780 (for instance)? I plan to use this with either Dayton Titanic or Adire DPL 12 for active subwoofer - if there is enough power ;) Thanx for any help. Rob M Take a look at the "design guides" here: http://www.national.com/appinfo/audio/ JDeV quote: Originally posted by Rob M Take a look at the "design guides" here: http://www.national.com/appinfo/audio/ I looked at that earlier, they don't support the LM4780 and I am not sure what the combined (bridged/parallel) result must be. In the BPA-200 application sheet , http://www.national.com/appinfo/aud...cation_Note.pdf , they also explain how to calulate the bridged Pmax, but not bridg/paral. peranders Check these especially the Excel file http://www.national.com/an/AN/AN-1192.pdf http://www.national.com/appinfo/aud...ign_Guide13.xls http://www.national.com/appinfo/aud...esign_Guide.pdf JDeV quote: Originally posted by peranders Check these http://www.national.com/an/AN/AN-1192.pdf http://www.national.com/appinfo/aud...ign_Guide13.xls http://www.national.com/appinfo/aud...esign_Guide.pdf AN-1192 and PAB-200 are basically the same document, 1st one is just a later version. The design guides is the same as what Rob M suggested. peranders I recommend that you take a look at the Excel calculations.

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