Bass Test is powerful low (bass) frequencies tester tool which will allow you to hear how good your audio system is. Connect it with your headphones, speakers, car audio system, home teather and choose one of the low frequencies from the [0-200Hz] intervall. It will push your system to a limit. How low can you hear. The lower frequencies u can hear, the better the device is. Tell us how low can you go in the comments :)