Radial SB-4 立体声有源DI直插盒批发零售 隔离变压器 消除接地回路的噪声DI直插盒 吉他DI盒 Radial DI直插盒

 

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SB-4 立体声有源DI直插盒

应用特点

u 超紧凑型，用于吉他电声乐器

u 有源优化的压电式信号放大缓冲器

u 高通滤波器消除峰值共振

u 1 和 5 兆欧姆压电式输入阻抗拓宽频率响应

u 有源电路高阻抗，使用 100 米传输线不丢失信号

u 压电式放大提供超宽的线性和无失真信号

u 高通滤波器和 180 度极性转换

u 辅助输出给舞台电声乐器音箱

u 军用级 14 规格钢材焊接制，使电路板不会发生扭转

u 底部防滑垫处理，提供物理机械隔离和电气绝缘

 

技术指标

u 设备类型：有源优化的压电式信号放大缓冲器

u 频率响应：20Hz-20kHz

u 总谐波失真：<0.006%

u 动态范围：>100dB

u 输入阻抗：5MΩ

u 最大输入：+4dBu

u 增益：+2dBu

u 电平输出：+3.3dBu/+12.3dBu

u 输出阻抗：330RΩ

u 等效输入的噪声︰-101dBu

u 本底噪声：-97dBu

u 互调失真：<0.01%

u 相位 偏差：10°@50Hz

u 低通滤波器：150Hz 极性反转：180°

u 尺寸：114x47x34mm 重量：250 克

 

StageBug SB-4 Active Piezo Direct Box

Compact Active DI with Piezo Input

The StageBug SB-4 is a compact active direct box that has been optimized for use with piezo transducers, allowing upright basses, violins, cellos, and other acoustic instruments to be connected to the PA without compromising their tone or frequency response.

The perfect companion for piezo instruments

The StageBug SB-4 allows you to retain the natural tone of your piezo-equipped instrument when amplified through a PA system. Unlike typical direct boxes, the SB-4 features a very high 5 meg ohm impedance that smooths out troublesome peaks that give piezo transducers a bad name. This higher impedance also broadens the frequency response for a more natural and pleasing sound. The active circuit balances the audio signal to enable long runs up to 100 meters without loss, while delivering spectacular linearity and low distortion throughout the audio range. Output connections include an aux out for a stage amplifier plus a standard XLR output to feed the PA.

Control feedback on stage

To help eliminate feedback on a live stage, the SB-4 is equipped with a high-pass filter and 180° polarity reverse switch. The high pass filter eliminates excessive bottom end which in turn reduces resonance that can cause the instrument to vibrate. The 180° polarity reverse helps reduce acoustic hot spots on stage by changing the phase relationship between the PA system and room acoustics which can combine at certain frequencies to create peaks.

 

SB-4 Specifications

The Radial StageBug SB-4 is an active direct box that has been optimized for use with piezo electric transducers such as used on classical guitar, violin, mandolin and upright bass. It features a high 5-meg-ohm input impedance that at once broadens the frequency response while reducing the peaks and squaw that are commonly encountered with piezo devices. This is augmented with a high pass filter that gently rolls off excessive bass. The unique AUX output is buffered to enable high impedance sources to feed pedals and amplifiers without interacting with the input impedance. Extra attention has been paid to the circuit design to ensure exceptional performance resulting in less than 0.01% distortion throughout the critical listening range and a noise floor that approaches -100dB. These features combine to make the Radial StageBug SB-4 a excellent solution for orchestral and acoustic instruments of all types.

 

Specifications

Block Diagram

Graphs

Specifications

Audio circuit type: Piezo optimized active buffer

Frequency response: 20Hz to 20kHz

Dynamic range: 100dB

Gain: +2dB

Total harmonic distortion: <0.006%

Intermodulation Distortion: <0.01%

Phase Deviation: 10° @ 50Hz

Input Impedance: 5Meg Ohms

Output Impedance: 330 Ohms

Equivalent Input Noise: -101dBu

Noise: -97dBu

Maximum Input: +4dBu

Features

180° polarity reverse, Ground lift, HPF

Input Connectors: 1/4"

Output Connectors: XLR

General

Construction: 16 gauge steel chassis & outer shell

Size (L x W x D): 4.5" x 1,85" x 1.35" (114mm x 47mm x 34mm)

Weight: 0.55 lbs (250 grams)

Shipping size (L x W x D): 8" x 5" x 3" (203mm x 127mm x 76mm)

Shipping weight: 0.8 lbs (365 grams)

Power: 48V phantom power, 5mA

Conditions: For use in dry locations only between 5°C and 40°C

Warranty: Radial 3-year, transferable