if you read the questions on amazon these questions have been answered by the seller. you can get a preamp for about 50-60 bucks at the pawnshop. itll look something like this http://www.amazon.com/M-Audio-Fast-Track-USB-Interface/dp/B002QZ402Q/ref=sr_1_1?ie=UTF8&qid=1434547315&sr=8-1&keywords=m+audio+fasttrack&pebp=1434547316958&perid=17ZWPQZPDB02XWXSMKV4
or this