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RadioShack Mini Audio Amplifier
https://www.radioshack.com/products/radioshack-mini-audio-amplifier
With a built in speaker, this mini audio amplifier is perfect for many acoustic projects. Also includes a microphone input and a speaker/earphone jack for …
Amazon.com: HYTECHTOYZ 9 Volt Portable 3 WATT …
https://www.amazon.com/HYTECHTOYZ-PORTABLE-ELECTRONIC-AMPLIFIER-CONTROL/dp/B01LWBHRUN
hytechtoyz 9 volt portable 3-watt universal helmet amplifier. this is a universal amplifier for use in in-helmet sound systems, voice changers, costume accessories, phone amplifier, etc. includes full instructions, volume control, and velcro mounting kit. full warranty. easy to use and install. made in america
How to Make 9 Volt Portable Guitar Amplifiers: Build your ...
https://www.amazon.com/Make-Volt-Portable-Guitar-Amplifiers/dp/1453728139
Paperback. $9.95 2 Used from $9.00 4 New from $9.95. Enhance your purchase. Learn step by step how to completely build a custom, boutique 1 Watt (9 Volt) guitar amplifier with instructions on how to wire all of the potentiometers, capacitors, fuses, resistors, switches, speakers, ground wires, hot wires, output jack, and audio chips.
Portable Guitar Amp With Distortion / Bass Amplifier - 9v ...
https://www.instructables.com/Portable-Guitar-or-iPod-Amplifier-Amp-9v-LM3/
Portable Guitar Amp With Distortion / Bass Amplifier - 9v / LM386 IC: This is a really simple portable guitar amp project you can complete in an afternoon ; with the parts you need at hand. I used an old surround sound speaker as my enclosure, and used the speaker. The unit also has 5 tone settings t…
Homemade Magnetic Audio Amplifier. - Spark, Bang, Buzz
http://sparkbangbuzz.com/mag-audio-amp/mag-audio-amp.htm
A magnetic audio amplifier. The 9 volt battery is to supply dc bias to the circuit. Magnetic audio amplifier schematic. High impedance signals can be fed into the input of this circuit by using a matching step down transformer such as the Bogen T725 or similar.
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