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A Passive Audio Amplifier for Your iPhone or iPad

A Passive Audio Amplifier for Your iPhone and iPad - RF CafeChristopher Locke has taken a low tech approach to making amplifiers for your iPhone and iPad. Rather than build an electronic contraption out of electrical components and speakers that requires a power source, he 'repurposes' discarded brass musical instruments for the task - ingenuous, I must say. Valves and levers are removed and a fancy metal cradle is attached to the reed port in a manner that positions the mobile device's speaker directly over the instrument's air intake. Videos are provided demonstrating the significant amplification afforded by the arrangement. It's hard to tell whether the full audio range is amplified sufficiently or if only those frequencies within the normal playing range are affected. Regardless, these functional sculptures would make a great conversation piece or even a gift for a musician friend.

Posted  February 2013

 

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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024

Webmaster:

    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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