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Can non-70v amplifiers be used with 70v ceiling speakers?
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<blockquote data-quote="John Roberts" data-source="post: 18894" data-attributes="member: 126"><p>Re: Can non-70v amplifiers be used with 70v ceiling speakers?</p><p></p><p></p><p></p><p>I am not familiar with any 70V "consumer" level amps. Most are designed for the dedicated duty, while most install applications are very cost sensitive. Yes a conventional amp could be substituted but to get the voltage swing you want, you will probably be leaving money on the table with an oversized amp for the power needed. As mentioned elsewhere in this thread you need to be careful about too much LF content that can saturate magnetics in the step down transformers on each speaker. </p><p></p><p>Fixed sound installers also like the transformer isolation of dedicated instal amp outputs because they are more tolerant of inadvertent shorts to ground on either speaker line, as long as only one leg gets grounded at a time. </p><p> </p><p>Before you jump to replace with a non-instal amp, you may want to price what using the correct amp would cost. They should not be very expensive. </p><p></p><p>Note: you will not need very much power for a modest boardroom system. </p><p></p><p>JR</p><p></p><p>PS: Does the old install amp work?</p></blockquote><p></p>
[QUOTE="John Roberts, post: 18894, member: 126"] Re: Can non-70v amplifiers be used with 70v ceiling speakers? I am not familiar with any 70V "consumer" level amps. Most are designed for the dedicated duty, while most install applications are very cost sensitive. Yes a conventional amp could be substituted but to get the voltage swing you want, you will probably be leaving money on the table with an oversized amp for the power needed. As mentioned elsewhere in this thread you need to be careful about too much LF content that can saturate magnetics in the step down transformers on each speaker. Fixed sound installers also like the transformer isolation of dedicated instal amp outputs because they are more tolerant of inadvertent shorts to ground on either speaker line, as long as only one leg gets grounded at a time. Before you jump to replace with a non-instal amp, you may want to price what using the correct amp would cost. They should not be very expensive. Note: you will not need very much power for a modest boardroom system. JR PS: Does the old install amp work? [/QUOTE]
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