User manual ART TUBE PAC

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Manual abstract: user guide ART TUBE PAC

Detailed instructions for use are in the User's Guide.

[. . . ] TUBE PAC PROFESSIONAL TUBE PREAMPLIFIER/COMPRESSOR USER'S GUIDE TABLE OF CONTENTS Introduction Registration Features Overview Setting Up Unpacking AC Power Hookup Audio Connections Installation Safety Precautions Powering Up Front Panel Controls and Indicators Gain Control Gain Switch Phantom Power Switch Tube Drive/ Gain Reduction Display Threshold Control Slope Switch Speed Switch Phase Switch Output Level Control Bypass Switch Rear Panel Connections Power Switch Input Output Applications Tube Replacement Specifications On-line Information Warranty Information Service Information 2 2 3 4 5 5 5 5 5 6 6 6 6 7 7 8 8 9 9 9 10 10 11 11 11 11 12 13 14 15 16 16 131-5004-101 1 Introduction Thank you for purchasing Applied Research and Technology's Tube PAC. You've undoubtably noticed that the Tube PAC is as cool sounding as it looks. After getting familiar with the Tube PAC, you'll realize what a great investment you've just made. Anywhere you need level adjustments (gain or attenuation), and anywhere you need compression - you'll be using the Tube PAC. [. . . ] These LEDs are calibrated with the tube circuitry to give you an N accurate representation of the tube's output signal (Note: these LEDs measure the signal level before the output level control). The next two LEDs are labeled "warm. " This is the optimal operating range for the Tube PAC. At this level, the tube is producing an output signal which most would term "warm" (Whatever you would like to call it is fine - simmering, toasty, etc. ) You'll find the output signal has an enhanced bottom to low mid quality with smooth high frequency detail. The last LED is labeled "Clip. " This LED will light approximately 6dB before audible distortion occurs. The unique design of the Tube PAC allows the tube to distort well before any other gain stage. When a tube goes into distortion it is a gradual process and tends to sound pleasing for a range before it turns into a distortion box. After some use you'll find the "sweet spot" of the Tube PAC is with this light flashing fairly regularly. You may find a "clipped" level is suitable for some applications. Note: Use the Tube Character Array to aid in setting the Input Level Control. Threshold Control The Threshold control sets the point at which the compressor circuit will act on the input signal. Turning this control counterclockwise lowers the threshold (adding more compression to a signal). Setting the Threshold control is dependent on the Gain control. 8 The easiest way to set the threshold control is to start with the control fully clockwise. After setting the Gain control, slowly turn the Threshold control counter-clockwise (lowering threshold) until you see the yellow (0dB) Threshold LED light. Now adjust the control (either lower or higher) until you have the amount of compression you desire. Use the Gain Reduction meter as a visual guide to the amount of compression applied. Slope Switch In its "out" position, the Tube PAC's compression ratio is an active 2. 3:1 ratio. This means that for every 2. 3dB over the threshold the input signal rises, the compressor's output will change by 1dB. This is a very mild and musical compression ratio which is ideal for smoothing all types of signals. In its "in" position, the compression ratio is greater than 6:1. This is typically called "soft limiting" as it allows only a 1dB change in signal level for any signal reaching over 6dB over the set threshold. This setting is ideal for applications where exceeding a set level is not desirable (mixing, popping bass, digital recording, etc. ). Speed Switch The position of the Speed switch selects the release characteristics of the Tube PAC's compressor. [. . . ] Please realize that unauthorized alterations to the Tube PAC will result in voiding the warranty. A R T Tube PAC SPECIFICATIONS Dimensions 5. 25"D x 8. 5"W x 1. 65"H Weight 6. 0 lbs Maximum Gain XLR to XLR 70dB 1/4" to 1/4" 67dB Phantom Power +48v DC (switchable) Compression Ratio 2. 3:1 (comp)/ 6:1 (lim) Attack Time 6. 5ms Release Time 200ms (fast), 70ms-1sec (auto) Equivalent Input Noise -129dBu (XLR to XLR, `A' weighted) Dynamic Range >90dB (no weighting) Input Impedance 1. 67k ohms (XLR), 1M ohm (1/4") Output Impedance 600 ohms (XLR), 300 ohms (1/4") Maximum input Level +15dBu (XLR), +21dBu (1/4") Maximum Output Level +27dBu (XLR), +22dBu (1/4") CMRR 90dB (typical) THD <0. 1% (typical) Tubes Two Hand-Selected 12AX7a Power Requirements 100-125 VAC, 16W (Export units configured for country of destination) A R T retains a policy of constant product improvement. A R T reserves the right to make changes in design or make additions to or improvements upon this product without any obligation to install the same on products previously manufactured. 215 Tremont Street Rochester, NY 14608 USA (716) 436-2720 (Phone) (716) 436-3942 (FAX) 14 WE'RE ON-LINE!For Product information, questions, applications, tips, answers and general discussion with A R T employees look for A R T on the Internet. . [. . . ]

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