正品 QSC GX5专业功放 大功率QSC功放机 专业大功率放大器 500W

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GX5使用H类放大电路系统，基于 PLX 系列功放的关键技术开发，几乎是在同等体积和重量的条件下提供双倍的功率。QSC的专业设计可以使输出功率在百万分之一秒内实现由低功率向高功率的快速转换，确保了输出功率总是按照需要准确输出，并且没有额外的损耗。

 两种功放都采用了环形电源变压器以确保其工作性能可靠性。再配以可变速风扇使空气循环通过功放，冷空气轮流经过变压器和散热片。这样能保证变压器保持冷却、并且可以在较小的机箱内安装全尺寸的散热器。长此以往，使功放得到了很好的保护，确保了它的性能和使用寿命。

GuardRailTM

 GuardRailTM保护技术可以使功率放大器防止过载并传送完整的峰值信号。在出现过度的削波，或极端过热的情况下，GuardRail保护技术可将增益减少到仅仅保持音乐的完整性，并保护扬声器同时保持听众的兴趣，而避免了非专业的失真或关机保护。

次低频扬声器/卫星扬声器分频器

 如何使全频音箱播放更大的声压级或者采用功率较小的扬声器达到同样的声压级效果？可以使用QSC GX系列功率放大器。GX系列功率放大器支持分频模式：将全频带信号输入至通路1，输出20Hz-100Hz的低频信号送入次低音扬声器（Ch1）和100Hz-20KHz的高频信号送入高音单元（Ch2）。当通过GuardRail技术得到最佳的峰值能量各自独立的进入次低音单元和高音单元时，可以使用前面板上的增益控制旋钮平衡地控制低音单元和高音单元的增益，从而得到更好的音乐效果和动态范围。

特点：

功率输出满足现今大部分演出系统扬声器

优化输出，使4欧姆或者8欧姆扬声器系统有一个最大限度的功率余量

 输入：XLR插头,1/4"TRS平衡插座和接线柱，几乎兼容所有的声源设备

输出：Speakon输出接口，1/4"非平衡插头或者speakon 2极或4极插头（仅仅连接两极）。 接线柱适合所有的扬声器线路系统

深度最小的机壳（10.1英寸/257毫米）可安装在紧凑的空间里，节省机柜空间，降低成本

重量轻－低于26磅（12.5kg）

平缓的增益控制更易于精确调整和输入灵敏度的匹配

GuardRail技术能够避免满负荷工作造成的功放和扬声器的过载、过热损坏

前面板上有对进行监控信号大小和削波的信号LED灯

内置超低频和卫星扬声器系统分频器

GX5 适用于阻抗8欧扬声器：450-600W （节目功率）**

·*适用于阻抗4欧扬声器：600-800W（节目功率）



Power Amplifier (500 Watts)

Power levels matched to the most popular speakers used by entertainers.

GX Series amplifiers are ideal for professional entertainers who require maximum performance an-d portability on a limited budget. QSC designers, headed by Pat Quilter, have optimized output an-d appearance while reducing raw material cost an-d weight. It's all here – dramatic styling, easy hookup an-d adjustment*****cellent audio quality an-d QSC reliability.

Features

Power levels matched to the most popular speakers used by entertainers

Optimized for maximum real-world headroom into 4 Ω an-d 8 Ω speaker systems

Inputs: XLR, 1/4-inch TRS an-d phono input connectors for compatibility with any source

Outputs: Speakon combo accepts, 1/4-inch (TS) plugs or Speakon 2-pole an-d 4-pole plugs (connects 2 poles only).

Binding posts support all other speaker wiring systems.

Minimum depth chassis (10.1 inches/257 mm)

Fits in compact, inexpensive effects racks Lightweight – less than 26 lbs (12.5 kg)

Detented gain controls for precise setting an-d matching of sensitivity

GuardRail automatically protects the amplifier an-d loudspeakers from damage due to temperature rise or overdrive without shutting down the show

Front panel LEDs monitor Power, Signal an-d Clipping

Subwoofer/Satellite crossover built-in GX Entertainer

GX amplifiers deliver just the right amount of power to the most popular speakers used by entertainers. Most loudspeaker manufacturers recommend an amplifier with power output equal to the speaker's "Program (Music) Power" rating or two times (2 x) the "Continuous (RMS) Power" rating.

The GX5 provides full performance for 500 watt (Program) speakers. Both models supply maximum possible power to 4 Ω an-d 8 Ω loads. Owners of popular 4 Ω loudspeakers (dual-woofer, two-way models an-d many subwoofers) will find the 700 watt (4 Ω) power of the GX5 an ideal match.

Technical Notes

The GX5 uses a Class H system, based on key elements of the PLX Series, almost doubling power in the same size an-d weight. QSC design expertise allows the output devices to shift from low-power to high-power rails in less than a millionth of a second, ensuring that the output power is always right where it needs to be without excess loss.

GX amplifiers use premium toroidal power transformers for reliable "mid-weight" performance. A variable-speed fan moves air crosswise through the amplifier, drawing cool air in over the power transformer, through the fan, an-d then over the heat sink. This keeps the transformer cool an-d allows a full size heat sink to fit in a down-sized chassis. As always, the amplifiers are fully protected from the usual hazards of the trade, ensuring stable performance an-d long life.

GuardRail

GuardRail protection delivers full peak power while preventing detrimental overloads. During excessive clipping, or extreme overheating, GuardRail reduces gain just enough to preserve the integrity of the music, protect the speakers an-d keep the audience excited, without unprofessional distortion levels or shutdowns.

Subwoofer/Satellite Crossover

A subwoofer reduces strain on the full-range speaker, allowing it to play louder, or letting a smaller speaker do the same job. The GX Series supports this mode with a Crossover switch that splits the full-range input entering Ch 1, sending 20 Hz - 100 Hz to the sub (Ch 1) an-d 100 Hz - 20 kHz to the top box (Ch 2). The front panel gain controls balance the sub an-d top box, while GuardRail optimizes peak power into the sub an-d top inpidually, for greater musical impact an-d dynamic range.

Technical Info

Specifications

Stereo Mode:

- 8 Ω / both channels driven: 500 Watts

- 8 Ω / single channel driven: 600 Watts

- 4 Ω / both channels driven: 700 Watts

- 4 Ω / single channel driven: 850 Watts

- 2 Ω / both channels driven: 350 Watts

Distortion:

- 8 Ω: less than 0.05%

- 4 Ω: less than 0.1%

Signal to Noise (20 Hz - 20 kHz): 100 dB

Input Sensitivity: 1.2 Vrms

Voltage Gain (8 Ω): 34.4 dB

Output Circuitry: 2-tier Class H

Power Requirements: 6A

Frequency Response: 20 Hz - 20 kHz, +0, 1 dB

Dynamic Headroom (4 Ω): 2 dB

Damping Factor: 100

Input Impedance: Greater than 20k (balanced)

Maximum Input Level: +24 dB (16 Vrms)

Input Connectors (each channel): 3-pin XLR an-d 1/4-inch TRS, balanced, parallel Phono, unbalanced

Output Connectors (each channel): Speakon, 1/4-inch, Binding Posts

Amplifier an-d Load Protection: Short circuit, open circuit, thermal, RF protection Load protected against DC faults

Front Panel Controls an-d Indicators:

- Gain controls, 21 detents

- Red Clip LEDs, proportional, 0.1% THD threshold

- Green Signal LEDs, threshold -35 dB

- Blue Power LED, AC on

Rear Panel Controls: Full Range / Crossover switch

Dimensions (H x W x D): 3.5 x 19 x 10.1 inches (89 mm x 483 mm x 257 mm)

Weight: 26 lbs (12 kg)

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