User manual ART DUAL TUBE EQ

[. . . ] DUAL TUBE EQ PROFESSIONAL TWO CHANNEL TUBE PARAMETRIC EQUALIZER USER'S GUIDE 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 High Shift Switch Output Level Control Bypass Switch Mono (cascade) switch Power Switch Rear Panel Connections Input Output Mono connections Tube Replacement Instruments and the Audio Spectrum Applications Specifications On-line Information Warranty Information Service Information 2 2 2 3 3-5 5 6 6 6 6 6 7 7 7 8 8 8 8 9 9 9 9 10 10 10 11 11 11 11 12 12 12 13 14 14 15 16 258-5004-101 1 Introduction Thank you for purchasing Applied Research and Technology's Dual Tube EQ. The Dual Tube EQ may be used anywhere you need equalization or frequency adjustments. Offering a superb level of sound quality, the Dual Tube EQ will enhance the sonic textures of your studio or audio system for years to come. Features The Dual Tube EQ is a unique product. [. . . ] Typically this will indicate clipping at the input stage (which is corrected by turning down the input gain control). However, it will also indicate any distortion caused by excessive EQ'ing. In other words, if turning down the input gain control doesn't make the clip indicator turn off, check the frequency bands for excessive boost. 7 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. The Low Frequency control has as range of +/- 12dB. Two ranges are selected with the Low Shift Switch: 40Hz or 120Hz. Note: You'll notice the Lo-Mid and Hi-Mid Frequency controls overlap (meaning they cover the same frequencies) in the 200Hz to 2KHz range. This is intentional and is another of the powerful features of the Tube EQ. This feature allows either or both controls to be used in this range. This is extremely useful if you want to cut at 200Hz and boost at 350Hz. High Frequency Control The High Frequency control adjusts a shelving filter with a selectable corner frequency of either 6KHz or 18KHz. The high shelving filter designed into the Tube EQ affects all frequencies above the corner frequency when applying boost or cut. In other words, cutting at 6KHz also cuts 7KHz, 8KHz, etc. The High Frequency control has as range of +/- 12dB. The two ranges are selected with the High Shift switch. 6KHz is great for adding top end to guitars, snare drums and vocals. Cutting 6KHz can also help to "take the edge off" brittle or harsh sounding instruments. 18KHz may be used to add "sizzle" to cymbals and is generally referred to as the "air" band. While there aren't very many instruments that contain 18KHz information directly, many instruments and mixes contain upper harmonics which can add extra definition and "space" when boosted. Cutting at 18KHz can decrease hiss and noise. High Shift Switch The High Shift switch selects the corner frequency of the High Frequency control. [. . . ] This warranty is void if the serial number is altered, defaced or removed. A R T reserves the right to make changes in design and make additions or improvements upon this product without any obligation to install the same on products previously manufactured. A R T should not be liable for any consequential damages, including without limitation damages resulting from the loss of use. Some states do not allow limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. [. . . ]