Q series adopts high-grade aluminum alloy panel and unique H amplifier circuit design which makes it work with high efficiency and more reliable and durable. Cooling fan uses intelligent CVT circuit, boot soft-start, anti-surge design which protects the post circuit better. The internal pressure limiter circuit plays an important protection on the end terminal of speaker. This series has the perfect protection circuits-overheating protection, short circuit protection, DC protection and RF interference filter protection. It is suitable for small-scale guerilla shows, luxurious clubs, cinemas and multi-function halls etc.