The magic crystals are over-hyped. I gotten much better results using organic sea-salt. Unlike the crystal it does need to be matched to the recordings. So if something was recorded on the west coast use pacific salt, east coast use atlantic. Most music from the midwest works well with a mixture of both. I experimented with Gulf Coast salt but it seemed to make the lowend muddy. Honestly, it's the best hundred dollar tweak I've found. PM me if interested in placing an order. For a limited time USPS priority mail shipping is only $45. For you persian music lovers Caspian Sea and Persian Gulf salt can be special ordered for double the cost.