USB PHONO PLUS
Audiophile Computer Interface
Project Series
USER’S MANUAL
IMPORTANT SAFETY INSTRUCTION – READ FIRST
This symbol, whenever it appears, alerts you to the presence of uninsulated
dangerous voltage inside the enclosure-voltage that may be sufficient to constitute a risk of shock.
Read instructions:
This symbol, wherever it appears, alerts you to important operating and maintenance instructions in the accompanying literature. Please read the manual.
Retain these safety and operating instructions for future reference. Heed all warnings printed here and on the equipment. Follow the operating instructions printed in this user manual.
Do not open:
There are no user serviceable parts inside. Refer any service work to qualified technical personnel only.
Power sources:
Connect the units power supply to mains power only of the type described in this user manual or marked on the power supply.
Power supply:
Use the power supply with sealed mains plug appropriate for your local mains supply as provided with the equipment. If the provided supply does not fit into your outlet consult your service agent. Route the power cord so that it is not likely to be walked on, stretched or pinched by items placed upon or against it.
Grounding:
Do not defeat the grounding and polarization means of the power supply.
Moisture:
To reduce the risk of fire or electrical shock do not expose the unit to moisture or use in damp or wet conditions. Do not place container of liquid on unit.
Heat:
Do not locate the unit close to excessive heat or direct sunlight, as this could cause a fire hazard. Locate the unit away from any equipment, which produces heat such as: power supplies, power amplifiers and heaters.
Environment:
Protect from excessive dirt, dust, heat, and vibration when operating and storing. Avoid tobacco ash, drink spillage and smoke, especially that associated with smoke machines.
Handling:
Protect the controls from damage during transit. Use adequate padding if you need to ship the unit. To avoid injury to yourself or damage to the equipment, take care when lifting, moving, or carrying the unit.
Servicing:
Unplug power immediately if equipment is exposed to moisture, the power supply becomes damaged during a lightning storm or if smoke odor or noise is noted. Refer servicing to qualified technical personnel only.
Installation:
Install the unit in accordance with the instructions printed in the user manual.
INTRODUCTION
The USB Phono Plus Project Series is a high quality USB audio interface with a built-in phono preamp. It acts as an interface between your computer and a wide variety of analog and digital sources. The analog inputs are switchable between Phono and Line level signals and a Low Cut filter removes rumble and wind noise while leaving the audio pristine. The front Gain Trim control and Signal/Clip LED allow you to optimize the analog to digital converter for a wide range of input sources. The front panel USB Monitor/headphone jack and the Optical Output on the rear panel can monitor the audio output from your computer. The USB Monitor/headphone jack can also provide zero latency monitoring of the input source for easy cueing of records and tapes. The built-in low noise Phono Preamp circuit is highly accurate and precisely conforms to the RIAA standard. The Line Out jacks are always connected to the input preamp signal for source monitoring or to allow use as a stand-alone phono preamp.
Housed in an all aluminum black anodized case, the USB Phono Plus Project Series can be powered by either an external power source or directly off the USB port, so remote recording is a snap. An Optical TOSLINK Input and Output as well as an S/PDIF Input let you use the USB Phono Plus Project Series as a digital audio to USB interface as well.
The USB Phono Plus Project Series is fully compliant with the USB 2.0 specification and uses USB adaptive mode for playback and USB asynchronous mode for recording. The USB Phono Plus Project Series interface uses the standard “USB Audio CODEC”. This driver is built into most modern operating systems, including most current versions of Linux. Since some details of how the audio interface is set vary with different versions of Linux, the setup is beyond the scope of this document. The main key in setup is to look for “USB Audio CODEC” as the recording source or playback monitor output while the USB Phono Plus Project series is connected. No special drivers are needed. We’ve included a CDROM containing the user manual and Audacity recording software to get you started!
Key Features Include
∙USB Connectivity to Desktop and Laptop Computers
∙RIAA Accurate Low Noise Phono Preamp
∙Up to 45 dB of Clean Gain
∙Latency Free Monitoring
∙S/PDIF or optical to USB and USB to Optical Interfaces Included
∙Preamp Line Out Allows Use as a Stand-alone Phono Preamp
∙Includes Audacity Recording Software
∙Compact, Stackable all Aluminum Chassis
∙Flexible Power from USB or External Power Supply
∙Three Year Warranty
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CONNECTIONS
The Preamp Phono/Line In connections are RCA-type jacks and are used to connect your turntable, tape, CD, MP3 player, or other analog stereo audio device to the USB Phono Plus Project Series.
The Ground terminal connection on the rear is used to connect the separate ground wire from your turntable to reduce hum. (This connection is unnecessary for digital output turntables).
The Preamp Line Out connections are RCA-type jacks that are always connected to the analog input preamp signal for source monitoring or to allow use as a stand-alone phono preamp.
The S/PDIF In To USB RCA-type connection is a digital input that overrides the Opto In and analog preamp signal connections whenever there is a valid digital signal present that is in S/PDIF format.
This digital signal input is routed to the your computer USB interface for S/PDIF to USB connectivity only. Note: You cannot connect S/PDIF to analog or analog to S/PDIF with this product.
The OPTO In To USB and OPTO Out From USB connections provide for Optical digital connections direct to your computer via USB. When there is valid TOSLINK digital signal at the OPTO In connection it overrides the analog preamp signal connection to the USB interface.
The 1/8-inch Headphone Monitor Output jack on the front is stereo unbalanced and can accommodate a wide variety of headphone models. Maximum output level is +6dBu (1.4Vrms).
The USB bus from your computer normally powers the USB Phono Plus Project Series. A power connector on the rear allows you to use an optional external power source to reduce the power drawn from your computer. The USB Phono Plus Project Series operates from any external power source that provides 150mA or more @ 7 Volts to 12 Volts DC (either polarity at the tip will work with our unit) or 9 Volts to 12 Volts AC.
The USB To Computer connector is USB 2.0 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 Phono Plus Project Series and will power the whole product if no other power source is available. This connection looks like a standard “USB Audio CODEC” to your computer, and your computer then controls the sample rate.
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