User manual GML GML2032

[. . . ] George Massenburg Labs GML 2032 Microphone Preamplifier / Parametric Equalizer The Model 2032 Microphone Preamplifier / Parametric Equalizer is a single-channel, multi-input device for high-resolution studio and remote applications. Incorporating the renowned 8300 preamplifier and reference-standard 8200 equalizer, the Model 2032 inherits over thirty years of GML engineering excellence. This transparent class-A discrete design with internal supply delivers reliability, musicality, and precision. Owner's Manual Version 1. 0 August, 2004 All materials herein © George Massenburg Labs, LLC. GML, LLC. Franklin, TN USA 615. 790. 9946 (ph) www. massenburg. com INTRODUCTION Combining the features of the GML flagship 8200 Parametric Equalizer and 8300 Transformerless Microphone Preamplifier, the Model 2032 embodies the legendary detail and accuracy for which GML is renowned. [. . . ] MI clipping, as stated, is independent of gain setting since the MI input buffer clips before the gain stage(s). 3 All PREAMPLIFIER measurements taken from Insert Out XLR, Insert switch engaged 4 All bandwidth tests conducted at +0. 0 dBu DUT output level for 1kHz reference. Measurements are typical across the gain range of the DUT. Default gain settings: 45dB +0dB, Mic and MI; 0dB, Insert (default; no gain control). 5 Direct -3 dB measurement using HP 3314A function generator (Rs=50) and Tektronix 2445 150MHz analog oscilloscope (Rin=1M, 15pF) unbalanced into RL = 20k termination. The low-frequency -3 dB corner of the Model 2032 exceeds the LF response of the HP 3314A, which has a -3 dB corner at 7 Hz. 6 Includes AP S2C residual THD+N of 0. 0007% and Analyzer 30 kHz LPF. Test conducted with -25 dBu swept sine, Mic input, 45dB +0dB gain setting. System noise contributes ­77 dBu (0. 0011%) to this figure. Measurement includes System One residual IMD of 0. 001%. SMPTE/DIN 4:1 signal, 7 kHz and 60 Hz applied at -35 dBu. 8 Noise measurement with Rs=150 balanced termination. Specification includes 2nd order LPF at 30 kHz. Theoretical source resistance noise for this bandwidth is ­129. 1 dBu. 9 Includes AP S2C residual THD+N of 0. 0007% and Analyzer 30 kHz LPF. Test conducted with -15 dBu swept sine, MI input, 15dB +0dB gain setting. System noise contributes ­85 dBu (0. 0044%) to this figure. Measurement includes System One residual IMD of 0. 001%. SMPTE/DIN 4:1 signal, 7 kHz and 60 Hz applied at -25 dBu. 11 Noise measurement with Rs=150 unbalanced termination. Specification includes 2nd order LPF at 30 kHz. Theoretical source resistance noise for this bandwidth is ­129. 1 dBu. [. . . ] Operating the unit before the servos settle may cause clicks and pops that can potentially damage speakers and/or other devices. The outputs of this unit are DC Servo stabilized, direct coupled, unbalanced and wired pin 2 "hot". Shorting either output (Insert Send, Output) will cause permanent damage. This unit contains ESD-sensitive components; handle with care. [. . . ]