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Tubeopto 8™

8-CHANNEL TUBE MICROPHONE

PREAMPLIFIER / OPTICAL INTERFACE

USER’S GUIDE

IMPORTANT

SAFETY INSTRUCTIONS – READ FIRST

This symbol, wherever it appears, This symbol, wherever it appears, alerts

alerts you to the presence of uninsulated you 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. Please read manual.

Read instructions:

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 guide.

Do not open:

Aside from four vacuum tubes, there are no user serviceable parts inside. Refer any service work to qualified technical

personnel only.

Power sources:

Only connect the unit to mains power of the type marked on the rear panel. The power source must provide a good

ground connection.

Power cord:

Use the power cord with sealed mains plug appropriate for your local mains supply as provided with the equipment. If the

provided plug 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.

Grounding:

Do not defeat the grounding and polarization means of the power cord plug. Do not remove or tamper with the ground

connection on the power cord.

Ventilation:

Do not obstruct ventilation or position the unit where the air required for ventilation is impeded. If the unit is to be operated

in a rack, case or other furniture, ensure that it is constructed to allow adequate ventilation.

Moisture:

To reduce the risk of fire or electrical shock do not expose the unit to rain, moisture or use in damp or wet conditions. Do

not place a container of liquid on it, which may spill into any openings.

Heat:

Do not locate the unit in a place close to excessive heat or direct sunlight, as this could be 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:

To prevent damage to the controls and cosmetics avoid rough handling and excessive vibration. 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:

Switch off the equipment and unplug the power cord immediately if it is exposed to moisture, spilled liquid, objects fallen

into opening, or the power cord or plug 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 guide.

III

The ART Tubeopto 8™

8-Channel Tube Microphone Preamplifier Optical Interface

IMPORTANT SAFETY INSTRUCTIONS – READ FIRST .............................................. II

INTRODUCTION..........................................................................................................1

INSTALLATION...........................................................................................................1

AC Power Hookup..................................................................................................................................................................................1

Analog Audio Connections .....................................................................................................................................................................1

CONTROLS and JACKS..............................................................................................2

FRONT PANEL ......................................................................................................................................................................................2

Instrument Input .....................................................................................................................................................................................2

Gain Control ...........................................................................................................................................................................................2

Pad Switch .............................................................................................................................................................................................2

+48V Switches........................................................................................................................................................................................3

Phase Switch..........................................................................................................................................................................................3

Low Cut Switch.......................................................................................................................................................................................3

LED Meter ..............................................................................................................................................................................................3

Output Control........................................................................................................................................................................................3

Sample Rate/Sync Switch ......................................................................................................................................................................3

Sample Rate LEDs.................................................................................................................................................................................4

Power Switch..........................................................................................................................................................................................4

REAR PANEL.........................................................................................................................................................................................4

Balanced Input Jacks – XLR & 1/4” TRS Combo Jacks .........................................................................................................................4

Balanced Output Jacks...........................................................................................................................................................................4

Output Level Switch ...............................................................................................................................................................................4

Wordclock Input and Thru Jacks ............................................................................................................................................................5

ADAT Jacks............................................................................................................................................................................................5

HARDWARE OPERATION............................................................................................6

How to adjust the preamplifier controls for the lowest noise...................................................................................................................6

How to set the Output Level switch (on the rear panel)..........................................................................................................................6

Changing the sample rate ......................................................................................................................................................................6

Using the wordclock input.......................................................................................................................................................................7

APPLICATIONS...........................................................................................................8

Typical applications ................................................................................................................................................................................8

Troubleshooting......................................................................................................................................................................................9

SERVICE ...................................................................................................................11

Tubeopto 8™ SPECIFICATIONS ...............................................................................12

List of Figures

FIGURE 1 - Input Channel....................................................................................................................................2

FIGURE 2 - Sample Rate Section ........................................................................................................................3

FIGURE 3 - Rear Panel........................................................................................................................................4

FIGURE 4 - Block Diagram...................................................................................................................................5

FIGURE 5 - Wordclock Connections ....................................................................................................................7