USBPre 2 Two-channel, portable, high-resolution USB audio interface

Overview

Two-channel, portable, high-resolution USB audio interface for Mac OS and Windows. Balanced mic/line analog and coaxial/optical SPDIF I/O, with up to 24 bit/192 kHz resolution. 48V phantom, peak limiters and high-pass filter on microphone inputs. Stand-alone operation allows use as microphone preamplifier and A/D converter. USB bus powered.

Key Features

Extended bandwidth, low-noise microphone preamplifiers with 48 V phantom, limiters, high-pass filters, and 15 dB pad.

Dynamic range greater than 114 dB (in 24-bit operation).

Flat 10 Hz to 40 kHz (@96 kHz SR) audio bandwidth with very low distortion characteristics.

Each input individually selectable between microphone, line, and aux level signals (both channels selected simultaneously for S/PDIF connections).

Precision, 23-segment, multicolor LED peak/VU meter, selectable between input and output sources.

High-output headphone amplifier can drive a wide range of headphones.

Balanced outputs on XLR connectors with dedicated level control can be used to drive line- or mic-level inputs.

Mix control enables zero-delay monitoring of source audio, computer audio, or a mix of both source and computer audio for multitrack recording or computer telephony.

Phono (RCA) jacks connect Aux Output to external loudspeakers or preamplifiers.

Bus powering via USB for convenient, single-cable connection to the computer.

In Stand-Alone mode the USBPre 2 operates as a microphone preamplifier and analog-to-digital converter.

Hardware loop-through for test and measurement to send computer audio directly back to an input.

High-strength extruded aluminum chassis.

Mac® OS X 10.4+, Windows®XP/Vista/7, and Linux, class-compliant audio device.

Additional features controlled by hardware DIP switches on the back panel; no software-only features and no control panel

概述

适用于Mac OS和Windows的双通道便携式高分辨率USB音频接口。平衡麦克风/线路模拟和同轴/光学SPDIF I/O，分辨率高达24位/192 kHz。48V幻象、峰值限制器和麦克风输入上的高通滤波器。独立操作允许用作麦克风前置放大器和A/D转换器。USB总线通电。

主要功能

扩展带宽、低噪声麦克风前置放大器、48 V幻象、限幅器、高通滤波器和15 dB衬垫。

动态范围大于114 dB（在24位操作中）。

平坦的10 Hz至40 kHz（@96 kHz SR）音频带宽，具有非常低的失真特性。

每个输入可在麦克风、线路和辅助电平信号之间单独选择（两个通道同时选择用于S/PDIF连接）。

精密，23段，多色LED峰值/VU表，可在输入和输出源之间选择。

高输出耳机放大器可以驱动各种耳机。

XLR连接器上带有专用电平控制的平衡输出可用于驱动线路或麦克风电平输入。

混合控制可实现对源音频、计算机音频或源音频和计算机音频的混合的零延迟监控，用于多轨录音或计算机电话。

Phono（RCA）插孔将辅助输出连接到外部扬声器或前置放大器。

通过USB总线供电，方便单电缆连接到计算机。

在独立模式下，USBPre 2用作麦克风前置放大器和模数转换器。

用于测试和测量的硬件环路，将计算机音频直接发送回输入。

高强度挤压铝底盘。

Mac®OS X 10.4+、Windows®XP/Vista/7和Linux兼容类音频设备。

附加功能由后面板上的硬件DIP开关控制；无软件功能，无控制面板

USBPre 2 Portable High-Resolution Audio Interface

Sound Devices’ USBPre® 2 is a high-resolution, portable hardware interface for Mac- and Windows-based digital audio. The USBPre 2 is the industry’s highest performance and most flexible portable interface, connecting professional microphones, line-level sources, consumer audio electronics, and S/PDIF digital sources with Mac OS and Windows computers via USB.

Precision Microphone Preamplifiers

USBPre 2 includes two discrete-transistor microphone preamps with 24-bit converters and sampling rates up to 192 kHz. These preamplifiers provide the highest performance in any portable interface. Their topology is shared with Sound Devices’ award-winning 744T Digital Audio Recorder. Peak limiters, high-pass filters, and a 15 dB pad provide overload protection. All analog-to-digital and digital-to-analog conversion is performed by the USBPre 2 for superior audio performance.

Computer Connectivity

USBPre 2 allows for simple plug-and-play connection to computers running Mac OS, Windows, and Linux. There are no drivers to install for the USBPre 2 and there are no software-only features. All additional controls and settings are available on back panel DIP switches. The USB port also provides power to the unit, both when connected as an audio interface and when used in Stand-Alone operation.

As a class-compliant audio device, the USBPre 2 is limited to a maximum data rate of 24-bit, 48 kHz in Windows, Linux, and Mac OS versions 10.4 to 10.5.7. Mac OS 10.5.8 and higher support the audio class 2.0 device and can address the USBPre 2 up to 24-bit, 192 kHz.

To enable higher sampling rates in Windows OS, download the available Windows ASIO driver.

Output Connectivity Flexibility

To interconnect with sound systems big and small, the USBPre 2 includes numerous output connection types, including balanced mic- or line-level on XLR, unbalanced consumer line-level on RCA, S/PDIF coaxial (RCA) and optical (Toslink). The outputs have their own, dedicated front-panel level control. Use the balanced line-level signals to connect to powered loudspeakers. Use the optical S/PDIF to connect to hi-fi systems. Use the coaxial S/PDIF output in Stand-Alone mode for a portable microphone preamplifer with digital output for any production application.

Informative Metering

Accurate signal level metering is essential for any sound engineer. The USBPre 2 includes a 23-segment, multicolor LED meter for precise level indication. The meter is switchable between input signal metering and playback signal metering. The meter indicates both VU and peak (PPM) ballistics.

Field-Tested Reliability

Like all of Sound Devices products, the USBPre 2 is designed to stand up to the most demanding environments. Its extruded aluminum chassis and aluminum panels, machined knobs, metal connectors, and laser-etched nomenclature are designed to hold up to years of abuse.

Stand-Alone Operation

The USBPre 2 can be used in Stand-Alone mode where it operates as a high-quality, portable microphone preamplifier and analog-to-digital converter. Digital signals connected to the USBPre 2 are converted to analog and available at the headphone, XLR, and RCA outputs. Stand-Alone operation requires the unit to be connected to a USB power source. Stand-Alone mode is a great option when an additional microphone preamplifer, A-D converter, or D-A converter is required.

USBPre 2便携式高分辨率音频接口

Sound Devices的USBPre®2是基于Mac和Windows的数字音频的高分辨率便携式硬件接口。USBPre 2是业界性能***、***灵活的便携式接口，通过USB将专业话筒、线路级源、消费级音频电子设备和s/PDIF数字源与Mac OS和Windows计算机连接。

精密麦克风前置放大器

USBPre 2包括两个带24位转换器的分立晶体管麦克风前置放大器，采样率高达192 kHz。这些前置放大器在任何便携式接口中提供***性能。其拓扑结构与Sound Devices屡获殊荣的744T数字录音机共享。峰值限制器、高通滤波器和15dB的衬垫提供过载保护。所有模数和数模转换均由USBPre 2执行，以获得卓越的音频性能。

计算机连接

USBPre 2允许与运行Mac OS、Windows和Linux的计算机进行简单的即插即用连接。USBPre 2没有要安装的驱动程序，也没有仅限软件的功能。所有其他控制和设置都可在后面板DIP开关上使用。USB端口还为设备供电，无论是作为音频接口连接还是在独立操作中使用。

作为一种符合类别的音频设备，USBPre 2在Windows、Linux和Mac OS版本10.4至10.5.7中的***数据速率限制为24位、48 kHz。Mac OS 10.5.8及更高版本支持音频类2.0设备，可寻址USBPre 2，***24位，192 kHz。

要在Windows操作系统中实现更高的采样率，请下载可用的Windows ASIO驱动程序。

输出连接灵活性

为了与大大小小的音响系统互连，USBPre 2包括多种输出连接类型，包括XLR上的平衡麦克风或线路电平、RCA上的不平衡消费者线路电平、S/PDIF同轴（RCA）和光学（Toslink）。输出具有自己的专用前面板级控制。使用平衡线路电平信号连接到电动扬声器。使用光学S/PDIF连接到高保真系统。在独立模式下使用同轴S/PDIF输出作为便携式麦克风前置放大器，并为任何生产应用提供数字输出。

信息性计量

准确的信号电平测量对于任何音响工程师来说都是必不可少的。USBPre 2包括一个23段多色LED仪表，用于***的液位指示。该仪表可在输入信号计量和回放信号计量之间切换。该仪表显示VU和峰值（PPM）弹道。

现场测试可靠性

与所有Sound Devices产品一样，USBPre 2的设计能够适应***苛刻的环境。其挤压铝底盘和铝面板、机加工旋钮、金属连接器和激光蚀刻命名法的设计可承受多年的滥用。

独立操作

USBPre 2可以在独立模式下使用，在该模式下，它作为高质量的便携式麦克风前置放大器和模数转换器工作。连接到USBPre 2的数字信号被转换为模拟信号，并在耳机、XLR和RCA输出端可用。单机操作需要将设备连接到USB电源。当需要额外的麦克风前置放大器、a-D转换器或D-a转换器时，独立模式是一个很好的选择。

What’s in the box:

USBPre 2 computer audio interface

2-meter USB A to USB B Cable

4 Adhesive Rubber “Bumpers”

盒子里有什么：

USBPre 2计算机音频接口

2米USB A到USB B电缆

4粘性橡胶“缓冲器”