Electronics World Cover,TOC,and list of posted Popular Electronics articles QST Radio & TV News Radio-Craft Radio-Electronics Short Wave Craft Wireless World About RF Cafe RF Cafe Homepage RF Cafe in Morse Code Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs Twitter LinkedIn Crosswords Engineering Humor Kirt's Cogitations Engineering Event Calendar RF Engineering Quizzes AN/MPN-14 Radar 5CCG Notable Quotes App Notes Calculators Education Magazines Software,T-Shirts,Coffee Mugs Articles - submitted by RF Cafe visitors Simulators Technical Writings RF Cafe Archives Test Notes RF Cascade Workbook RF Stencils for Visio Shapes for Word Thank you for visiting RF Cafe!

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

Try Using SEARCH to Find What You Need.  >10,000 Pages Indexed on RF Cafe !

Copyright 1996 - 2016
Webmaster:  Kirt Blattenberger, BSEE - KB3UON
Family Websites:  Airplanes and Rockets | Equine Kingdom

All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.