User manual ART TUBE EQ

[. . . ] TUBE EQ PROFESSIONAL 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 Bypass Switch Gain Control Clip Indicator Output Level Control Instruments and the Audio Spectrum 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 Rear Panel Connections Power Switch Input Output Tube Replacement Applications Specifications On-line Information Warranty Information Service Information 2 2 3 3 4 7 7 7 7 7 8 8 8 9 9 9 10 10 11 11 11 12 12 12 13 13 13 14 14 14 15 16 16 17 18 1 128-5004-101 Introduction Thank you for purchasing Applied Research and Technology's Tube EQ. The Tube EQ may be used anywhere you need equalization or frequency adjustments. Offering a superb level of sound quality, the Tube EQ will enhance the sonic textures of your audio system for years to come. Features The Tube EQ is a unique product. [. . . ] The green power LED will glow red when Bypass is engaged. In its "out" position, the EQ is active. Use the Bypass switch when setting the Tube EQ's input and output levels to achieve unity (no boost or cut) gain. Unity gain is achieved when the active level is the same as the bypassed level. Gain Control The Gain control sets the amount of input gain to the Tube EQ. Turn the control clockwise to increase gain and counterclockwise to decrease it. To maximize your signal to noise ratio, it is important to start with a unity gain setting (meaning that the level into the Tube EQ is the same as the level out of the Tube EQ). With the output level at its "0" position, adjust the input gain until the level is the same when the Tube EQ is bypassed and active. Clip Indicator The Clip indicator will illuminate just before any gain stage of the Tube EQ reaches audible distortion. The low shelving filter designed into the Tube EQ affects all frequencies below 10 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. 40Hz is great for enhancing sub-low frequencies such as those in bass guitars and kick drums. Cutting 40Hz can also help to "clean up" mixes that sound muddy or "loose" in the low end. 120Hz is generally the low-end for vocals, guitars and toms. Boosting 120Hz can add "weight" or "beef" to a week vocal and cutting it can "thin out" a signal that takes up too much room in the low end. Low Shift Switch The Low Shift switch selects the corner frequency of the Low Frequency control. In the "out" position the corner is 40Hz. In the "in" position the corner is 120Hz. Lo-Mid Frequency Control The Lo-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. [. . . ] EXCLUSIONS: This warranty does not apply in the event of misuse or abuse of the product or as a result of unauthorized alterations or repairs. 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. [. . . ]