IMPORTANT SAFETY INSTRUCTION – READ FIRST This symbol, whenever it appears, This symbol, wherever it appears, alerts you alerts you to the presence of uninsulated to important operating and maintenance dangerous voltage inside the enclosure-voltage instructions in the accompanying literature. that may be sufficient to constitute a risk of shock.
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INTRODUCTION: The USB Dual Pre is a full-featured high quality dual portable preamplifier and computer interface packed into a compact rugged case. It is designed to work over a wide variety of applications from remote field recording to desktop/studio tracking. Each of the two low noise input channels has up to 48 dB of clean gain with signal present and clip LED indicators.
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CONNECTIONS: Left and Right “Combo” jacks on the front allow for either XLR or 1/4-inch TRS input connections. The XLR Input connections are used primarily for balanced microphone input. Pin 2 is positive, pin 3 is negative, and pin 1 is ground. +48 Volt phantom power (when enabled) is supplied to pins 2 and 3 and pin 1 acts the ground return.
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The USB connector is USB 1.1 compliant and should be used to connect directly to one of the USB connections on your computer. This connection also powers the USB circuitry inside the USB Dual Pre and will power the whole product if no other power source is available or active. To your comput- er this connection looks like a “USB Audio CODEC”...
CONTROLS and OPERATION: The Left Gain and Right Gain Controls directly adjust the input amplifiers giving you control over the dynamic range of your source. You get from 0 to 48dB of gain depending on settings. Set the controls counterclockwise to minimum gain when connecting the inputs. The Monitor Mix control allows you to directly blend between the internal preamplifier signals and the playback signals from your computer.
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A brief note from customer service: Once in a while a customer will call and say: I think my ART preamp is "noisy". What's wrong? If you experience unwanted "noise" in your system when you use a stand-alone preamp, please consider what your signal is and where you're sending it.
USB OPERATION: Connect your analog jacks and external power supply first. If you are using one of the analog outputs for local low latency monitoring, connect that to your monitor system or headphones. Next, set the front panel controls for proper operation as per the previous sections. Then connect the USB cable to the appropriate input on your computer and lastly to the USB connector on the USB Dual Pre.
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The USB Dual Pre will work well as a very functional DI for Bass, Acoustic Guitar and virtually any other instrument with a 1/4-inch or XLR output. Many people prefer the sound of ART preamps for responsiveness instead of standard DI’s and preamps. You will also enjoy more flexibility and control over a standard DI.
2) If you believe the ART unit is at fault, go to www.artproaudio.com. You may contact Customer Service for more assistance, or directly request a Return Authorization for service in the “resources” area of the website.
1.75inch H x 4.6inch W x 4.7inch D (44.5mm x 117mm x 119mm) Weight: 1.3 lbs. (0.59 kg) Note: 0 dBu = 0.775Vrms ART maintains a policy of constant product improvement. Therefore, specifications are subject to change without notice. Go to www.artproaudio.com...
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www.artproaudio.com E-mail: cserve@artproaudio.com USB Dual Pre 179-5004-102...
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