User manual ART PRO CHANNEL

[. . . ] Pro Channel TUBE MIC PREAMP / COMPRESSOR / EQUALIZER USER'S GUIDE Contents FEATURES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 OVERVIEW . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 WHY USE AN EXTERNAL PROCESSING CHANNEL?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 DESIGN NOTES. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 SETTING UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] The two frequencies are selected with the Low switch (see below). The low shelving filter 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 control has as range of ±12dB. Low Switch The Low switch selects the corner frequency of the Low control. In the "out" position, the corner is at 40Hz. In the "in" position, the corner is at 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 - 13 - "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. Lo-Mid Control The Lo-Mid control is a dual concentric pot (i. e. , there are two controls ­ one outer and one inner). The outer control is used to select a frequency while the inner one is used to apply boost or cut. The amount of boost or cut available depends on the setting of the Lo-Mid (Wide/Narrow) switch: ±12dB for Wide and ±20dB for Narrow. Bandwidths are approximately 1 octave and 1/3 octave, respectively. Also, the Lo-Mid control can cover two frequency ranges depending on the position of the Lo-Mid (X 10/Norm) switch; these ranges are 20Hz to 200Hz and 200Hz to 2KHz. Lo-Mid (X10/Norm) Switch The first Lo-Mid switch determines the frequency range covered by the Lo-Mid control (above). In its "out" position, the range is set at 20Hz to 200Hz. In its "in" position, the range is set at 200Hz to 2KHz. You'll notice that the Low and Lo-Mid control ranges overlap (meaning they cover the same frequencies); this is intentional and is one of the powerful features of the equalizer. Lo-Mid (Narrow/Wide) Switch The second Lo-Mid switch determines the width of the frequency band that the Lo-Mid control covers. In its Wide position (out), the Q is approximately 1. 1. [. . . ] You can replace the tubes with other brands, however A R T has no responsibility for the resulting sound quality; they may sound better, they may sound worse. Unauthorized alterations to the Pro Channel also will result in voiding the warranty. 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, and to install the same on products previously manufactured. [. . . ]