I am building my first "juke case" and in doing so ran across a few questions and issues. I am new to the audio field but came across a really cool briefcase that i thought would turn into a great juke case. after looking around and deciding that i wanted to go with a lithium ion battery set up, i found the following audio amp (2 x 50 Watt 4 Ohm Class D Audio Amplifier with Bluetooth 4.0 APT-X - JAB2-50) from sure electronics Sure Electronics' webstore 2 x 50 Watt 4 Ohm Class D Audio Amplifier with Bluetooth 4.0 APT-X - JAB2-50 in finding this amp it comes with a battery pack as well as all hook ups (aux, usb, bluetooth, and charger) i just need to get the batteries from amazon and seems like the perfect amp for the smaller project. the size of the case is 17x12x5 inches and would like to do a larger speaker (10 or 8 in) and a smaller speaker maybe a 6.5/6 in and one 3 or 1 in speaker. i don't know if that will work and or what speakers i should get to sound the best. i really don't understand the ohms and such of the speakers so any help or guidance will help out greatly!