: OTL designs often achieve much wider frequency response, especially in the deep bass and ultra-high frequencies, because they aren't limited by a physical core.
: OTL amps often run very hot and consume significant power because they must use many tubes in parallel to provide enough current for 8-ohm speakers. tube tranny free
: A modern approach by Linear Tube Audio that uses high-frequency carrier waves to mimic a transformer’s impedance matching without the actual iron core. : OTL designs often achieve much wider frequency
: Without a massive transformer to "charge up," the amplifier can respond more quickly to sudden musical peaks. tube tranny free