The USB Dual Pre is a high-quality portable preamplifier and computer interface in a rugged, compact package.
It is designed to work on a wide variety of applications ranging from remote field recording to office/studio monitoring. Each of the two low-noise input channels has up to 48 dB of clean gain with signal present and clipping LED indicators. Inputs can be balanced XLR or 1/4 inch TRS. Each of the 1/4-inch TRS outputs is balanced, buffered low impedance.
The USB Dual Pre is powered by the USB bus. An internal 9 volt battery or optional external 12 volt power supply (or any combination of USB, battery and power) can be used depending on the application. When the device is powered solely by battery, you should expect over 50 hours of operation with the phantom power off. Battery life will drop to around 20 hours (depending on microphone) when phantom power is enabled (still enough time to get through an average session).
Built-in low-noise +48-volt phantom power lets you power up to 2 microphones plus the preamplifier when using all power sources, including the USB bus. For monitoring, a mini 1/8-inch TRS headphone jack with level and monitor mix controls on the rear allows for latency-free local monitoring of inputs during recording as well as USB bus playback monitoring . The monitor mix is also routed to the balanced 1/4-inch TRS outputs. This allows you to use the 1/4-inch outputs as preamplifier outputs or as a monitor power supply for your powered monitors.
The USB interface fully complies with the USB 1.1 specification and uses adaptive USB mode for playback and asynchronous USB mode for recording. It will work with built-in USB audio device drivers in Windows 98SE/ME/2000/XP/Vista and Apple OS9.1/OSX computers with native USB support. No special drivers are needed.
Features :
- USB connectivity to desktop and laptop computers
- Low-noise balanced XLR and TRS Combi 1/4-inch XLR inputs
- Up to 48 dB of clean gain n Built-in low-noise phantom power
- Latency-free monitoring mix and level controls
- Independent channel gain controls
- Balanced 1/4 inch TRS monitor outputs and 1/8 inch headphone output
- Includes Audacity Recording & Production Software
- Flexible 3-way power supply from USB port, external power supply or 9 volt battery
- USB cable included - Everything you need to start recording today!
Specifications:
- Frequency response: 20 Hz 20 kHz (+0, -1 dB)
- THD: 60 dB
- Channel separation: >75 dB
- Signal/noise ratio: >90 dB (Ref 0 dBu)
- Equivalent input noise: -120 dBu typical (balanced XLR, gain @ maximum)
- Input impedance: >300k Ohms 1/4 inch input, >4k Ohms XLR input
- Output impedance: 600 Ohms (1/4 inch balanced), 50 Ohms (1/8 inch headphone)
- Maximum signal level: +6 dBu in, +10 dBu out (balanced), +4 dBu out (unipolar)
- Maximum gain: +48 dB (balanced input/output)
- Phantom power: selectable by switch, +48Volts DC, filtered, current limitation
- Input connections: XLR / 1/4" TRS combo jack balanced or unbalanced
- Output connection: 1/4 inch TRS balanced mini earphone jack, 1/8 inch mini TRS earphone jack
- A/NN/A: 16-bit, 44.1 kHz or 48 kHz, USB computer selectable
- 0.4 ms A/D latency at 44.1 kHz
- Computer interface: USB 1.1 compatible, Windows 98SE/ME/2000/XP/Vista32bit,
- Apple OS9.1/OSX computers with native USB support
- Chassis type: Full black anodized aluminum with integrated rubber sides
- Power supply required: 7.5-12V AC or DC @