QSC RMX4050 专业功率放大器
技术参数：
QSC推出RMX4050HD功率放大器代表着专业领域中最精良的技术和合理的价格。完美地适用于广泛的扩声场合:包括专业流动演出，音乐家演奏和移动DJ；对于要求持续高功率输出，非同凡响的声音表现和产品可靠性的用户来说，RMX4050HD是最好的选择。
特 点：
1)RMX4050HD提高了散热效率,在2欧姆立体声或4欧姆桥接时可提供更高的连续功率。
2)RMX4050HD具有增强的温控设计,在2欧姆立体声模式和4欧姆桥接模式使用时可以提供更高的连续功率.
3)双路单声道,大电流供电提高可靠性和性能
4)3RU底座,进深只有16英寸
5)专业品质－融合了经过实践证明的QSC成功设计
6)大电流环形变压器承担2欧姆负载输出,噪音低
7)独立用户可开关的削波限制器减小失真
8)可选择的低频滤波器(30Hz或50Hz)保护扬声器,增加动态余量
9)平衡式1/4英寸(6.3毫米)TRS，XLR和条形输入接口
10)接线柱和Neutrik Speakon输出接口
11)可安装的前面板增益控制钮，更容易操作
12)信号和削波LED指示灯检测功放工作状态
13)每通道独立直流和温度过载保护，自动保护功放和扬声器
14)一年保修。
像它的“小兄弟”(RMX1850HD)一样,RMX4050HD是两种RMX“大容量”型号中的一种,这种“大容量”型号是设计用于可以在2欧姆负载下使用,而大部分其它品牌的功放只能在4欧姆负载下使用。由于采用了三层,H级放大电路设计,RMX4050HD在实际使用中功效是非常高的。交流电流损失小,更多的电流用于实际音频信号的功率放大。而RMX4050HD完成这些工作只用一个标准15安培的插头。
像所有RMX功率放大器一样,RMX4050HD带有平衡1/4英寸TRS，XLR和条形端子输入,接线柱和Neutrik Speakon™输出,前面板可安装增益控制钮,信号和削波LED指示灯监控功放状态。
过热保护系统
持续可变速风扇使功放在工作时噪声极低。气流由后至前，以保持功放及机柜冷却。
输入滤波器
通过使功放和扬声器频带范围的匹配提高系统的响应能力.防止扬声器低频段音质混浊不清。每个声道单独可调;采用最小型的全频带扬声器是为50Hz;采用次低音扬声器和大型全频带系统是为30Hz;采用录音棚监听时关闭。
功率放大器：机体尺寸紧凑,在2U空间中输出功率可达到2500W。专业质量性能-体现了已被证实的QSC的成功设计。大电流环形变压器使2欧姆负载输出功率更高,噪音更低。用户可选的削波限制器可将低失真。接线柱及Neutrik Speakon输出端子。可选低频滤波器(30Hz或50Hz)能保护扬声器,并提高峰值功率余量。1/4"(6.3mm)TRS平衡插孔,XLR插头和条型端子输入，信号和削波发光二极管指示灯可监视功放的工作状态，每声道独立的直流电源保护和热过载保护能自动地保护功放和扬声器
削波限制器
当RMX功放驱动困难时,削波限制器自动地找到过载点的确切位置,并使功放在其"峰值区域"保持工作并在不影响效果的情况下防止音质严重失真。低频滤波器和削波限制器均可在各声道独立调节。
输入滤波器
通过使功放和扬声器频带范围的匹配提高系统的响应能力.防止扬声器低频段音质混浊不清。每个声道单独可调: 采用最小型的全频带扬声器是为50Hz;采用次低音扬声器和大型全频带系统是为30Hz；采用录音棚监听时关闭。
RMX4050HD技术参数:
850/8Ω
1400/4Ω
2000/2Ω
4000/桥接4Ω
Power Amplifier
800 watts per channel at 8 Ω in stereo mode. Capable of 2-Ω operation.
QSC's RMX 4050HD power amplifier represents the state-of-the-art in professional-quality performance at an affordable price. Perfectly suited for a wide range of sound reinforcement applications including professional touring, performing musicians, and mobile DJs, the RMX 4050HD is optimized to deliver high levels of sustained power, extraordinary audio performance, and road-proven reliability.
Like its smaller sibling (the RMX 1850HD), the RMX 4050HD is 1 of 2 RMX "Heavy Duty" models designed to work as hard into 2-Ω loads as most competing amplifiers will at 4-Ω. With a 3-tier, Class H design, the RMX 4050HD is extremely efficient at real world power levels. Less AC current is wasted and more goes into producing useful audio power. The RMX 4050HD accomplishes all this with a standard 15-Amp plug.
Like all RMX amps, the RMX 4050HD features balanced 1/4 in. TRS, XLR and barrier strip inputs, binding posts and Neutrik Speakon outputs, front-mounted gain controls, plus signal and clip LED indicators to monitor performance.
The RMX 4050HD provides improved thermal performance that gives you higher continuous power in 2-Ω stereo or 4-Ω bridged applications
Features
Dual mono, high current power supply for increased reliability and performance
3RU chassis only 16 in. deep
Professional quality performance?incorporates road-proven QSC designs
High-current toroidal transformers for greater 2-Ω power and low noise
Independent user-defeatable clip limiters reduce distortion
Selectable low-frequency filters (30 Hz or 50 Hz) protect speakers and increase headroom
Balanced 1/4 in. (6.3 mm) TRS, XLR, and barrier strip inputs
Binding post and Neutrik Speakon outputs
Front mounted gain controls for easy access
Signal and Clip LED indicators to monitor performance
3-year warranty
Technical Info
Stereo Mode, Both Channels Driven Continuous: Average Output Power Per Channel
8 Ω FTC 20 Hz-20 kHz 0.1% THD: 800 Watts
4 Ω FTC 20 Hz-20 kHz 0.1% THD: 1300 Watts
2 Ω FTC 20 Hz-20 kHz 0.1% THD: 1600 Watts
8 Ω EIC 1 kHz 0.1% THD: 850 Watts
4 Ω EIC 1 kHz 0.1% THD: 1400 Watts
2 Ω EIC 1 kHz 1% THD: 2000 Watts
Bridge-Mono: Mode Bridge-Mono Mode Operation
8 Ω FTC 20 Hz-20 kHz 0.1% THD: 2600 Watts
8 Ω EIA 1 kHz 0.1% THD: 2800 Watts
4 Ω EIA 1 kHz 1% THD: 4000 Watts
Distortion (SMPTE-IM): Less than 0.02%
Distortion (Typical)
20 Hz-20 kHz: 10 dB below rated power: Less than 0.02% 4 Ω, less than 0.01% 8 Ω
1 kHz and below: full rated power: Less than 0.02% 4 Ω, less than 0.01% 8 Ω
Frequency Response:
20 Hz to 20 kHz, 8 Ω, LF filter bypassed, +0/-1 dB
5 Hz to 50 kHz, 8 Ω, LF filter bypassed, +0/-3 dB
Damping Factor: Greater than 250 @ 8 Ω
Noise (unweighted): 100 dB below rated output (20 Hz to 20 kHz, 8 Ω load)
Input Sensitivity: 1.25 Vrms for 800 watts into 8 Ω
Controls Front: AC power switch, Ch. 1 and Ch. 2 gain control
Controls Rear: 10-pole DIP switch featuring LF filter on/off, LF filter 30/50 Hz, Clip Limiter on/off controls for each channel and switches for selecting Stereo, Parallel, or Bridge mode. Push-button circuit breaker for each channel.
Voltage Gain: 64x (36 dB) for 8 Ω load
Input Impedance: 20 k Ω balanced, 10 k Ω unbalanced
Indicators:
Power-On: Green LED, Protect: Red LED
Signal -30dB: Yellow LED, Clip: Red LED
Connectors Input: XLR female, TRS (1/4 in.), and barrier-strip screw terminals, each channel
Connectors Output: Binding posts and Speakon outputs (Ch. 1 Speakon wired for biamp)
Cooling: Continuously variable-speed fan, rear-to-front air flow
Amplifier Protection: Short circuit, open circuit, thermal, ultrasonic, and RF protection. Stable into reactive or mismatched loads
Load Protection: On/off muting, DC fault output crowbar
Power Requirements: 100, 120 or 240 Volts AC (+/-10%) 50-60 Hz (factory configured)
Dimensions W x H x D: 19 x 5.25 x 15.9 in. (48.3 x 13.3 x 40.39 cm)
Weight: 68 lbs. (30.84 kg) net, 77 lbs. (34.43 kg) shipping
Note: Specifications subject to change without notice.
