QSC PowerLight 9.0 PFC High Powered Professional Amplifiers
July 10, 1998QSC Audio has set new standards in high powered professional amplifiers with the introduction of the PowerLight 9.0 PFC. Delivering 1,800 watts per channel at 8 ohms, 3,200 watts per channel at 4 ohms, and 4,500 watts per channel at 2 ohms, the PowerLight 9.0 PFC provides the highest power density ever achieved by a professional audio power amplifier.
QSC has incorporated Power Factor Correction (PFC) technology into the PowerLight 9.0 PFC that eliminates the poor power factor and low efficiency of traditional mega-power amplifiers. Typically, these factors cause sagging of the AC voltage which, due to unregulated power supplies, reduces output capability. Power Factor Correction solves this problem by lowering peak AC current requirements by as much as 40% thereby reducing the strain on AC power distribution.
The PL 9.0 PFC also features line and load regulation, making the amplifier's peak power capacity insensitive to drops in incoming AC voltage. Other power supply features include true soft start, automatic AC over voltage protection, and a frequency-invariant design that operates on nay incoming AC frequency.
The amplifier's output circuit is equally innovative. State-of-the-art high speed components and large-die, N-channel MOSFETs are combined with a four-tiered DC supply to yield efficiency comparable to class D designs, while operating in the linear mode for lowest distortion and noise. The extreme power capability of modern MOSFETs allows a 7-to-1 improvements over normal bipolar audio transistors. To further reduce space requirements, surface mount components (SMT) are used extensively throughout.
The PowerLight 9.0 PFC also features all advantages of the PowerLight Series: data port for amplifier monitoring, flow-through cooling with fully variable-speed fans, and a standby mode. The outputs also feature both Neutrik Speakons and special speaker terminals to handle the unprecedented output power. For more information, visit their web site at www.qscaudio.com. |
