MSP 50 is a single coil passive soundhole magnetic pickup that enhances realism and smoothness in your guitar sound. It's slim design can avoid the soundhole obstruction that other soundhole pickup used to. You will not even realize that MSP 50 is sitting on your guitar until you hear the natural acoustic sounds coming out from your guitars. MSP 50 has been designed brilliantly to keep the miscellaneous parts all together. Mounting clamps are permanently attached to the main body with foam rubber covered slots to prevent damage to your guitars. MSP 50 features adjusted pole pieces and uniquely designed magnetic bar magnet for precise string to string balance.