Here are some songs which utilize the full audio spectrum. These are examples that have very low bass frequencies and beautiful highs. They can be used to test equipment or just for listening enjoyment. Feel free to email any of your suggestions!
The following contributions have been made on behalf of the amplifier owners:
If you put a pair of headphone speakers inside a hearing protection headset you can protect your ears while you enjoy music in a loud environment or while using loud equipment. Here are some pictures and details about the process:
THE KOSS PORTA PROS
Some more information about my favorite headphones for under $50:
When I was an electrical engineering student I built a small amp to bring along on the daily 4 hour round trip commute. I wanted the headphones on the bus to sound like they did when I plugged them into a stereo at home. Having a nice system really helped. A few months later the Pocket Amp 1 model was offered to others in the audio community. In time that has turned into the current PA2V2 model. The amps are all still hand made and there are now three people who help with things part time.