The 4000BRB Planar Wave System from Barcus Berry does the job that would otherwise take several microphones and a multi-channel mixer to achieve. It attaches easily to either side of a soundboard without holes to drill or tools and features an active direct box which includes a 9-volt battery or phantom power, 1/4" monitor output with variable level, balanced, XLR main out with ground lift and output pad switch (0db/-12db). It also includes piezo crystal for piano/harp.