In most audio accessories, 'Di' will always be better than 'Mono'. A dipole bass system has a "figure of eight" response pattern which allows the sound output to be much more wholesome and dynamic. The one drawback that systems with Dipole woofers have is that they are usually bulky. We recommend dipole woofer systems in spacious areas. True audiophiles set up speaker systems with two dipole woofers and sometimes even four dipole subwoofers. DO NOT TRY THIS IN YOUR CAR!