close in price??? I think the HD315 was like $300+ dont quote me on that but i think it was...The HD315 from what i have read is like a DD9515 without the cooling, and a tad bit less motor strength...I have heard them both and honestly the HD3 gets louder on the same amount of power in similar enclosures..But im not sure why one is more sought after then the other..Havent noticed thatwhy are the hd3 and the hdc3 so close in price but the hdc3 is more sought after...
you have to pay extra for that i believenot a step up or down, just an improvement of a sub already in production, from what i can remember the upgrades where a flat-wound aluminum coil, 12-spoke basket with better cooling, a beveled pole piece, multiple spiders, stiffer cone and a triple-stacked motor, but im pretty sure power handling, and rec enclosures where similar