Amazon.com: LyxPro 40 Watt Electric Guitar Amplifier | Combo Solid State Studio & Stage Amp with 8” 4-Ohm Speaker, Custom EQ Controls, Drive, Delay, ¼” Passive/Active/Microphone Inputs, Aux In & Headphone Jack :
Make a Sweet Portable Guitar Amp : 6 Steps (with Pictures) - Instructables
All About Direct Boxes : Aviom Blog
1Wamp, An Open Hardware Guitar Amplifier | Hackaday
Electric Guitar Amplifier + Preamplifier – Electronics Projects Circuits
Modular Preamplifier Control Center - RED - Page148
Amazon.com: LyxPro Electric Guitar Amp 20 Watt Amplifier Built In Speaker Headphone Jack And Aux Input Includes Gain Bass Treble Volume And Grind - Black : Musical Instruments
Common Tube Amp Malfunctions: My amp makes no sound. — Tropical Fish
100W Guitar Amplifier (Mk II)
How Amps Work
Deluxe Micro
Simple Guitar Transmitter (EE Tip #102) - Circuit Cellar
Simple Guitar Headphone amplifier with overdrive and aux input - Tataylino.com
mixer - Headphone amplifier for guitar with stereo MP3 input - mixing - Electrical Engineering Stack Exchange
Build a Great Sounding Audio Amplifier (with Bass Boost) from the LM386