These high-quality speakers can withstand the most demanding touring conditions and continue to deliver outstanding JBL sound every time. The versatile 15" 2-way speaker has multiple functions, allowing it to double as a quasi 3-way. While the upper woofers cover lows and mids, the crossed lower woofers act as built-in subwoofers because they only cover lows. The result is a multi-layered, vibrant sound quality with rich detail. These speakers work great with the GSQ GX5 Amp from UniqueSquared.