The Adam S3H studio monitors feature 2 x 7-inch low frequency drivers, a 4-inch hybrid carbon composite mid-frequency driver and the precision S-ART tweeter. The S3H speakers offer absolute precision for critical listening. Specifically designed for horizontal placement, the key feature difference between the S3H and S3V, is that the S3H has the two LF divers with separate 500 watt amps, and the S3V has one 9-inch driver. The S3H also boasts a slightly better frequency response too. Like all S series monitors from Adam, the S3H has custom DSP for setting crossovers internally, and fine-tuning the speakers to your room. The S3H are an active studio reference speaker designed to function as mid-field monitors, and are front-ported.