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Message: <blockquote data-quote="JimJ" data-source="post: 2291814" data-attributes="member: 555251">It's the cost of the transformers, basically...Anytime you have an audio signal that passes through a transformer, that's going to be the limiting factor in the bandwidth, and single ended amps like the ones you linked to require air gapped output transformers; cheaper iron core ones will kill any chance of having a flat frequency response. And the power transformer needs to be sized to provide 100% rated power, all the time, every time the amp is on. It's definitely not an efficient way to make noise //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gifPush pull amps don't demand as much, because they're operating in Class AB and split the power demands between two or more tubes.</blockquote>

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