User manual GML GML8200

[. . . ] Specifically, the 8200 provides complete control over a wide frequency range and "Q" setting, along with 15 dB of cut or boost on five individual bands, with the front panel controls for frequency and "Q" mounted concentrically. The addition of the "Q" characteristic represents the foremost advance in equalizer technology since the invention of the transistor as a replacement for bulky and noisy vacuum tubes, and empowers the user to maintain precise and musical control over the tonal attributes of the spectrally processed signal. (Graphical representation of the Q characteristic and gain steps may be found in Appendix A of this manual. ). The availability of up to 15 dB of gain or attenuation is significant in the audio world, since most contemporary equalizers offer at most 12 dB of cut or boost, and usually not over such flexible overlapping multiple bands. Thus, it is possible to achieve any particular "sound" that is desired, no matter if the goal is a subtle alteration or an audible coloration effect. [. . . ] Power Supply Pin-Out Legend reveals the appropriate voltages from the external power supply. Power Supply Throughput is a 5-pin XLR connector that allows a second unit to be connected to the same external power supply without the need for a "Y" cable. The Ground Strap normally connects electronics ground and chassis ground; however, it may be removed by the user if it is thought to be beneficial for a particular installation. J. The GML Serial Number Tag contains a permanent imprint of the unit's assigned serial number. The CE (European Electromagnetic Compatibility) marking indicates full compliance with EN 55013:1990 (Electromagnetic Disturbance, Sects. 3. 2, 3. 5) and EN 55020:1988 (Electromagnetic Compatibility, Sects. 4. 3, 5. 4, 6. 2, 7. 0, 8. 0). DESIGN Though the front panel controls seem very intuitive to the initiated and experienced audio engineer, the circuit design behind these controls is anything but simple and straightforward. The GML 8200 features exemplary input and output buffering circuits in addition to the actual equalization circuits. It is important to keep in mind that all circuits in any device necessarily alter the sonic character of any complex signal, though these colorations have been meticulously minimized in the design of the 8200. Many contemporary equalizer designs are not sensitive or wary of this aspect of audio electronics and thus require some amount of alteration to compensate for this additional spectral signature induced by the unit itself. Interestingly, care has also been taken--as in all aspects of the GML 8200--to select the highest quality components, from the potentiometers on the front panel to the smallest passive elements. This attention to detail partially elucidates the quality found in the GML 8200 Parametric Equalizer. These component choices, coupled with superior design and a proclivity towards innovation, combine to make the GML 8200 Parametric Equalizer the most powerful, flexible, and transparent equalizer ever designed. Another feature that distinguishes the GML 8200 from the myriad of other commercially available equalizers is its inherent dynamic range, which allows for the addition of 15 dB of gain in multiple frequency bands simultaneously without even a hint of distortion or loss of detail and authority. This amazing power is due in large part to the GML propensity to design all audio circuits from discrete components. Discrete designs, when executed properly, help to preserve not only sonic integrity and musicality, but also to allow for the widest dynamic range through the entire signal path, thus eliminating many sonic compromises and limitations. Not only do these discrete structures--and the GML 9202 discrete opamp in particular--sound better than their integrated counterparts, they also offer the ability to design for higher signal levels internally, while also optimizing dynamic range by providing a low noise floor. An additional benefit of the discrete circuit topology used in the GML 8200 Parametric Equalizer is increased bandwidth. Not only does this significant extension--of both high and low frequencies--provide for more detail and realism; it also ensures a greater degree of linearity in the traditional audio spectrum (20 Hz to 20 kHz) by locating bandwidth poles superceding these commonly-accepted limits. Indeed, the frequency response of the Model 8200 is well within +/- 0. 1 dB from below 10 Hz to well above 80 kHz, while the +/- 3. 0 dB response exceeds the ability of most audio test apparatus to measure. POWER SUPPLY Integral to the superb quality of all GML products is the external power supply. No piece of electronic equipment can operate as designed without an adequate power supply; however, most contemporary spectral processing devices do not feature a supply which can provide clean, quiet power without unduly heating the device. The GML 8355 excels in this respect, providing clean, quiet power for the many complex and sensitive circuits of the GML 8200, while remaining cool and efficient. [. . . ] Box 1366 Franklin, TN 37065 615. 790. 1016 (ph) 615. 794. 4802 (fax) internet:: www. massenburg. com Repairs: GML, LLC. Franklin, TN 37064 615. 790. 1016 (ph) 615. 794. 4802 (fax) Engineering: GML, LLC. Attn: Jeffrey Warren, Chief Engineer Franklin, TN 615. 790. 1016 (ph) 615. 794. 4802 (fax) email: jeffrey_d_warren@yahoo. com Pricing/Ordering: Frank Wire Thousand Oaks, CA 805. 492. 8175 (ph) email: tgs. group@verizon. net Technical Information: GML, LLC. Attn: Jeffrey or George Franklin, TN 615. 790. 1016 (ph) 615. 794. 4802 (fax) internet: www. massenburg. com NOTICE OF COPYRIGHT AND OWNERSHIP All designs, circuit board artwork, front panel artwork, text contained herein and therein, and all other intellectual material is the sole property of George Massenburg Labs, LLC. [. . . ]