美国QSC:SC28 2进8出数字系统控制器_周边,处理器,SC28 尽在香港百利恒国际有限公司

产品类别：数字信号处理器

产品名称：美国QSC:SC28 2进8出数字系统控制器

产品价格：面议
关键词：周边,处理器,SC28
产品说明：香港百利恒国际有限公司提供美国QSC:SC28 2进8出数字系统控制器产品信息,包括美国QSC:SC28 2进8出数字系统控制器产品详细介绍,美国QSC:SC28 2进8出数字系统控制器产品参数，3D图库等信息，显示的美国QSC:SC28 2进8出数字系统控制器图仅为参考,购买请以美国QSC:SC28 2进8出数字系统控制器实物为准.

美国QSC:SC28 2进8出数字系统控制器技术参数

QSC SC28 2进8出数字系统控制器

SC28数字系统控制器具有2路输入，8路输出。它包含QSC扬声器系统设计的预置程序。除预置参数外，SC28还提供用户可调整的均衡和延时。

音频输入和输出都是平衡的线路电平、模拟XLR接口。四个输出端口可对应两个输入端口的任意一个，用于两分频或三分频附加超低音系统使用。SC28操作简单，拥有不容置疑的音质，其使用的32位浮点运算的数字信号处理器具有48千周/24比特的数模/模数转换技术，可提供宽广的动态范围和低失真。先进的数字信号处理器可以实现使用无限冲击响应（IIR）和有限冲击响应（FIR）滤波器的各种调整。

QSC公司的系统工程师在SC28中使用了有限冲击响应（FIR）滤波器来实现扬声器的“内置校正”。内置校正的目的是为功放和扬声器信号提供尽可能精确的声场振幅、频率和相位。调试得当时，内置校正可以补偿很多自然现象造成的损失。比如，声学波导阻抗和扬声器的圆锥共振影响。由此可使扬声器系统有出色的功率响应和在整个带宽和覆盖范围内表现出自然和纯正的音质。内置校正与扬声器阵列一起使用时，可以利用均衡可以对线阵列结构、声学环境和用户对声音的偏好进行补偿。

调节系统参数可以通过滚轮在SC28前面的液晶板上选择QSC扬声器和配置类型。也可以用同样的方法选择QSC功放，并且可以为每台功放配置输入灵敏度来实现合适的保护动态的增益结构。为了使SC28应用于QSC未来的产品，通过后面板USB端口，还可以轻松导入新产品的各种参数。

一旦SC28与系统匹配使用，用户或工程商便可使用内置六段参量均衡、高/低频搁架式滤波器和信号延时器，对声学环境和审美因素进行优化。密码保护功能可以防止未授权者对系统数据进行修改。
操作简便、高性价比的SC28为用户提供了极好的声音。

主要特点：
2个XLR线路电平输入
8个XLR线路电平输出
前面板上所有输入和输出通道表头显示
通用AC电源输入
后面板的USB端口用于方便快速地载入新型扬声器参数
前面板控制：
快速设置扬声器系统
QSC扬声器选择：
选择所需QSC扬声器及其配置（两分频、三分频等等），SC28可立即重新设置本身参数，使重放声音达到优化
QSC功放的选择：
选择使用的QSC功放，以校准功放与处理器的匹配，获得最佳的平衡和扬声器保护
用户可调整输入EQ：
6个可调频点、增益、带宽的参量滤波器

高/低频搁架滤波器可调整频率、增益和斜率
用户可调整延时：
超低音延时调整范围为0.00到50.00毫秒

线阵列延时调整范围为0.00到20.00毫秒
超低音扬声器管理：
选择立体声或单声道的超低音设置

可调整超低音增益

无论是有无超低音扬声器都可实现系统优化
扬声器保护：
优化每只扬声器单元的过热保护和过长冲程保护

用户可选用的输出削波限制器
通道连锁功能：
为立体声通道设置连锁控制或者独立控制

The SC28 is a 2 input, 8 output digital system controller containing pre-programmed tunings for QSC loudspeaker systems (see list of supported loudspeakers at right). In addition to the preset tunings, the SC28 also offers user-adjustable equalization and delay.

Audio inputs and outputs are via balanced, line-level, analog XLR connectors. Four outputs for each of the two inputs are provided for use with 2 or 3-way systems plus subwoofers. Simple to operate yet uncompromised in audio quality, the SC28 uses 48 kHz, 24-bit A/D and D/A conversion with 32-bit, floating point DSP for wide dynamic range and low distortion. Advanced DSP is capable of implementing tunings that incorporate IIR (Infinite Impulse Response) as well as FIR (Finite Impulse Response) filters.

QSC system engineers have employed the power of the SC28's FIR (finite impulse response) filters to implement "Intrinsic Correction™" of the loudspeaker. The goal of Intrinsic Correction™ is to provide a drive signal to the amplifiers and loudspeakers that will result in the most accurate acoustical magnitude, frequency and phase domain performance possible. When properly implemented, Intrinsic Correction™can compensate for many causal phenomena such as the effects of waveguide acoustical impedance and loudspeaker cone resonance. The result is a loudspeaker system with excellent power response and extremely natural, uncolored sound across its frequency band and coverage area. An array of loudspeakers with Intrinsic Correction™ tunings will also be very responsive to the use of equalization to compensate for array configuration, acoustical conditions or user preferences.

Selection of tunings is accomplished by simply scrolling through a list of QSC loudspeakers and selecting the configuration on the LCD panel. A similar process is used to select the QSC amplifiers being used and to configure amplifier input sensitivity for proper dynamic protection gain structure. Settings for new QSC products may be loaded into the SC28 via a rear-mounted USB port.

Once the processor settings have been matched to the system, the user or installer can take advantage of an integral, 6 band parametric equalizer, high and low shelving filters and signal delay to optimize for acoustic, environmental or aesthetic considerations. Password protection is included to prevent unauthorized tampering. The SC28 is easy to use and delivers superb audio performance at a very affordable price.

SPECIFICATIONS SC28 System Controller
Dynamic Range
Unweighted
A weighted
(AES-17, -60 dB Method, all sensitivities)

> 104dB
> 107dB

Input Impedance
Unbalanced (nominal)
Balanced (nominal)
69k ohms
11k ohms
Common Mode Rejection
20 Hz - 20 kHz (min)
20 Hz - 20 kHz (typ)
> 75 dB
> 80 dB
Input Sensitivities Vrms: 1.5V, 3V, 9V, 18V
dBU: 5.7, 11.8, 21.3, 27.3
dBV: 3.5, 9.5, 19.1, 25.1
Distortion
+4 dBu
2 dB below clip (max)
(AES-17, 20 Hz - 20 kHz, all sensitivities)
< 0.006 THD+N
< 0.006 THD+N
Crosstalk (20 Hz – 20 kHz)
Inter-channel (max)
> 75 dB
Frequency Response +/- 0.1dB from target response
Audio Converters 24 bit, 48k Hz
Mute Infinite Attenuation
Throughput Delay 1.4125 milliseconds (A/D – DSP - D/A)
Program Inputs
Connector Type
Type
Grounding
Pinout
2
XLR female, locking
Electronically balanced
All shield terminals connected to chassis
1: (GND) 2: (+), 3: (-)
Program Outputs
Connector Type
Type
Grounding
Pinout 8
XLR male
Electronically balanced
All shield terminals connected to chassis
1: (GND) 2: (+), 3: (-)
Controls Rotary encoder knob with push-to-select function
Indicators
Power
LCD Data Display
Input/Output Meters
Blue, front panel
2 lines 16 character, backlit, front panel
Green, Yellow, Red, front panel
USB Port USB type “B”
AC Power Requirements 100-240 VAC, 50-60 Hz, no user adjustment required
AC Power Connection IEC-type inlet
AC Power Cord 2 meters long, #18AWG
Dimensions 1.73"H x 18.94"W x 6.67"D
(44 mm x 481 mm x 169 mm)
1 Rack Unit
Weight 4.5 lbs / 2 kg