Hd series single channel 31 band 1/3 octave graphic equalizer; dual channel 15 band 2/3 octave graphic equalizer; dual channel 31 band 1/3 octave graphic equalizer (17 pages)
Summary of Contents for Art DUAL TUBE EQ
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DUAL TUBE EQ PROFESSIONAL TWO CHANNEL TUBE PARAMETRIC EQUALIZER U U S S E E R R ’ ’ S S G G U U I I D D E E...
Table of Contents Introduction Features Registration Overview EQ Tips Unpacking AC Power Hookup Audio Connections Installation Safety Precautions Powering Up Front Panel Controls and Indicators Gain Control Clip Indicator Low Frequency Control Low Shift Switch Lo-Mid Frequency Control Low-Mid Shift x10 Switch Hi-Mid Frequency Control Hi-Mid Shift x10 Switch High Frequency Control...
Dual Tube EQ possesses flexibility and “sound” that is not available from any other product on the market - at any price! The Dual Tube EQ was designed and constructed with the best components, assuring a lifetime of quiet, reliable performance.
Why use an external EQ? The goal of any recording is to get the sounds right before you commit them to tape. The Dual Tube EQ exists to help you get it right so you don’t have to “fix it in the mix”.
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Dual Tube EQ is a better sounding and more flexible equalizer. It all comes down to economics: Mixer manufacturers need to make trade-offs to keep prices down while keeping performance up. The use of external processing (equalizers, preamps and com- pressors) has sonic and practical benefits when you consider that most recording is done one or two channels at a time.
Unpacking Your Dual Tube EQ was packed with care at the factory. The shipping carton was designed to protect it during initial ship- ment. Please retain this carton for use in transporting the Dual Tube EQ, or in the unlikely event that you need to return your Dual Tube EQ for servicing.
- Between electronic musical instruments (synthesizers, guitars, bass, samplers, acoustic instruments with pickups) and other gear. * Note: The Dual Tube EQ is NOT a mic preamp! It doesn’t have enough gain to amplify the mic signal to line level! SAFETY PRECAUTIONS Warning: To avoid the risk of shock or fire, do not expose this unit to moisture.
Tube EQ be installed in an area where there is adequate venti- lation. If the Dual Tube EQ fails to power up when the power switch is turned on, check to see that its power cord is plugged into an active outlet.
Low Frequency Control The Low Frequency control adjusts a shelving filter with a selectable corner frequency of either 40Hz or 120Hz. The low shelving filter designed into the Tube EQ affects all frequencies below the corner frequency when applying boost or cut. In other words, cutting at 40Hz also cuts 30Hz, 20Hz, etc.
Hi-Mid Frequency Control The Hi-Mid control is a dual concentric pot (meaning there are two controls - one outer and one inner). The outer control is used to select a frequency while the inner control is used to apply +/-12dB of gain. The Hi-Mid control can cover two fre- quency ranges depending on the position of the Shift x 10 switch.
Note: Using the Dual Tube EQ for adding gain will not damage the unit. The only thing that will suffer will be the signal to noise ratio (meaning that if you use the Dual Tube EQ as a distortion box, it will probably be noisy). However, use caution and observe the input levels of the equipment that the Tube EQ is plugged into to be sure you are not overdriving it.
LED will glow red and all eight-bands of the Dual Tube EQ are active for the signal connected to chan- nel One’s input and output jacks (labeled channel 1/MONO on the rear panel). When this mode is used, the input and output level controls for channel two do not affect channel one.
Tube Replacement The tubes in your Dual Tube EQ should last for many years. The tubes used in your unit are carefully hand-sorted for perfor- mance. In the event that you need to replace them, A R T sug- gests that you do so with tubes available from A R T.
The Dual Tube EQ has gain and it is possible to plug an instru- ment directly into it. However, the Dual Tube EQ does not have enough gain to properly preamplify a microphone plugged directly into it.
A R T Dual Tube EQ Specifications Dimensions: Weight: Frequency Bands: Low Shelf: Low-Mid Sweepable: High-Mid Sweepable: High Shelf: Gain/Frequency Band: Dynamic Range: Input Impedance: Output Impedance: Maximum Input Level: Maximum Output Level: Total Harmonic Distortion (THD): Tubes: Power Requirements: A R T retains a policy of constant product improvement.
WARRANTY AND SERVICE INFORMATION Limited Warranty Warranty service for this unit will be provided by Applied Research and Technology, Inc. in accordance with the following warranty statement. Applied Research and Technology, Inc. (A R T) warrants to the original purchas- er that this product is free from defects in workmanship and materials for a peri- od of three years from the date of purchase.
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SERVICE The following information is provided in the unlikely event that your unit requires service. Use this procedure to return units in the United States only. For service outside the United States, please contact your authorized A R T distributor. 1) Be sure the unit is the cause of the problem.