JL Audio features three popular lines of amplifiers, the JD series, the RD series, and the XD series. It can be difficult to decide which product line is best for you because the specifications are so similar across all three platforms, but the prices can be significantly different. Why is a 1000 watt monoblock, subwoofer amp 389.99 in the JD series, but 679.99 in the XD series? This article will focus on discussing some key differences so that you can make an informed decision about which amplifier line best fits your needs and your budget.