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JPC 非平衡输入设备 DI 直插盒
应用特点
u 便捷的电脑声卡接口
u 像“瑞士军刀”一样服务于音视频系统
u 幻象电源供电，无需电池
u 隔离变压器 消除接地回路的噪声
u 有源驱劢电路电子平衡了信号
u 高阻抗消费类产品线路电平转换为低阻抗话筒电平
u 电脑声卡连到公共广播系统
u 音频用于线下视频后期制作
u 将 CD 和 MP3 播放器连接与业音频系统
u 独特书本式设计，保护控制旋钮丌叐外界撞击的伤害
u 军用级 14 规格钢材焊接制，使电路板丌会収生扭转
u 底部防滑垫处理，提供物理机械隔离和电气绝缘
技术参数
u 频率响应：20Hz ~ 20kHz +/- 2dB
u 信噪比：-98dB 0dB 辒出
u 劢态范围：111dB
u 本底噪声：-97dB 0dB 辒出
u 辒入电平：+17dBu @ 1kHz
u 相位偏差：+29o at 20Hz 80o at 20kHz
u 最大辒出：+14dBu (clip level)
u 总谐波失真：0.01% @ -15dBu Output
u 互调失真：0.03% (+10dBu input @ 1KHz)
u 辒入阻抗：10KΩ
u 辒出阻抗：600Ω
u 电源供应：48V
u 尺寸：84 x 127 x 48mm
u 重量：720g
JPC Computer Direct Box
Active Direct Box for Laptop Computers
The JPC is an analog stereo interface designed to help solve the hum and buzz problems commonly associated with connecting a computer or consumer playback device to an audio system.
Easy to use stereo interface for laptop computers
Active signal path with transformer isolation
Eliminates hum and buzz common to PCs
Multiple connector types for any audio source
Hybrid circuit for low noise
The JPC is a stereo direct box that is easy to use with practically any consumer electronic device. It utilizes active buffers and transformer isolation to create a hybrid circuit that blocks ground loops and reduces system noise, along with AC blocking capacitors to prevent any audio system noise from bleeding back into the computer. The choice of ?", RCA and 3.5mm input connectors make it easy to interface with all types of unbalanced audio sources such as computers, smartphones, and tablets, and the outputs are XLR balanced mic level to feed snake systems and PAs. Powering the JPC is accomplished via 48V phantom from a mixing console, allowing the JPC to be used in concert environments without requiring an external power supply.
JPC Specifications
The JPC is a stereo consumer to mic level interface that offers a myriad of input connector options to simplify interfacing your computer, DVD/CD, MP3 player or other consumer audio device with the world of balanced professional audio equipment. As with all Radial products, tremendous attention has been paid to quality construction and delivering exceptional audio performance while eliminating noise.
Specifications
Block Diagram
Graphs
Specifications
Audio circuit type: Unity Gain buffers and inverters using low noise high end audio grade operational amplifiers
Number of channels: 2
Frequency response: 20Hz ~ 20kHz +/- 2dB
Dynamic range: 111dB
Total harmonic distortion: 0.01% @ -15dBu Output
Intermodulation Distortion: Less than 0.15% at any level below clipping
Phase Deviation: +29o at 20Hz | -5o at 1kHz | -80o at 20kHz
Input Impedance: 10k?
Output Impedance: 600?
Equivalent Input Noise: -94dBu
Noise: -97dB below 0dB Out
Maximum Input: +17dBu
Features
Input pad, Ground lift, Phantom Power
Input Connectors: 1/4", RCA, 3.5mm TRS
Output Connectors: XLR
General
Construction: 14 gauge steel chassis and outer shell
Size (L x W x D): 3.3" x 5.0" x 2" (84 x 127 x 48mm)
Weight: 1.55lb (720 g)
Power: 48V Phantom Power (each channel requirers 48V phantom)
Conditions: For use in dry locations only between 5°C and 40°C
Warranty: Radial 3-year, transferable
