differential output amplifier query
Posted by Alan L. Maier [SysOp] [IP: 216.192.137.15] on August 07, 1999 at 18:15:12
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In Reply to: differential output amplifier query posted by Alberto Gonzalez Rimini on August 05, 1999 at 12:33:19:
Alberto, I believe you will be fine. Some loudspeakers use common ground connections between the two cabinets - examples are the old Polks SDA series or more recently with many (most?) miniature sat/sub systems such as the Bose Acoustimass and it's clones. (Somehow I do not think you are dealing with those!). With a traditional stereo pair and without a subwoofer in the signal path, you will be fine. Defintely remember to remove the bi-wire jumpers first. Alan : Hi. First of all, sorry for my English, which is not my native language.
: To the question: I'm planning to biamplify my Tannoy Profile 633s using an AMC 3050a integrated for the treble/mids and an AMC 2445 in 2-channel (bridged) mode for the bass; I think I know how to do it, using a Y adaptor from the pre-out to each power amplifier. My question, however, arises because AMC states that "when in bridge mode the 2445 becomes a differential output amplifier... do not connect the 2445 when bridged to speakers that share a left and right common ground... (it) may be damaged as a result". Would that warning apply to the setup I described? Would there be such a connection at the passive crossover of the speakers, which in turn are connected to the 3050a, that perhaps shares a common ground?.
: Any comments will be really appreciated. Thank you in advance.
: Alberto.
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