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Posted on Jan 02, 2017
i soundds like its too powerfull for them beouse some new speakers now have a shut off if they are ready to go out or blow to make sure you dont damage them
Posted on Jan 15, 2007
OK if you came out of the receiver sub pre-out RCA jack into the subwoofer RCA jack ( most subs call this low level line in) and no sub sound you may need to program the receiver to tell it that a subwoofer is being used, many receivers have this function, and some default it to NO SUB and them your low end soung goes to the front right and left speaker, so check the receiver manual and look under adding a subwoofer instructions if available.
Posted on Jan 29, 2009
It's not that this amp isn't like "newer amps" with + and - terminals, it's that this amp is made for public-address system use. This kind of amp is used in a store, for instance, to pump background music through speakers all over the place. The terminals you connect to are determined by total impedance of the speaker configuration used.
Most single speakers, or the two- or three-way cabinets for home stereo systems, are 8 ohms. If you're connecting a single speaker you use the "common" and "8 ohm" terminals on the rear panel. With multiple speakers, you need to figure out the total impedance and use the appropriate terminal. In series, impedances add. Two 8 ohm speakers in series would total 16 ohms, so you use the common and 16 ohm terminals. In parallel, the total impedance drops. Two 8 ohm speakers in parallel total only 4 ohms. You need to figure the total impedance of the speaker configuration and connect accordingly. Too great of a mismatch will damage the amp or speakers or both.
You might be able to find the manual for this amp on Radio Shack's website. Here's a link to the manual for the model MPA-40 which should have similar output terminals. The basic information about figuring out total impedance and general use of PA amps applies to your amp as well.
Posted on Jun 16, 2009
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