Chameleon Labs
Model 7681
Discrete Class AB Microphone Preamplifier
Module
Owner’s Manual
704 228
th
Avenue NE, # 826
Sammamish, WA 98074
206-264-7602
www.chameleonlabs.com
Revision A May, 2010
Page 1: ...Chameleon Labs Model 7681 Discrete Class AB Microphone Preamplifier Module Owner s Manual 704 228th Avenue NE 826 Sammamish WA 98074 206 264 7602 www chameleonlabs com Revision A May 2010...
Page 2: ...rparts manufactured in the early 70 s The Chameleon Labs Model 7681 is based on high audio performance design techniques By employing classic circuit design polystyrene capacitors hand selected compon...
Page 3: ...Ohms mic input impedance selectable on the front panel 48VDC phantom power selector on the front panel 12 position Grayhill gold contact rotary gain switch for Mic gain section LED illuminated push b...
Page 4: ...his selector switch controls the gain of the preamplifier circuit The microphone section provides 25 to 80dB of gain in 5dB steps Output This control acts as a master fader This allows for trimming of...
Page 5: ...The Chameleon Labs Model 7681 has been designed to be powered by an API compliant powered chassis Consult the chassis product manual for further information The card can also be powered by the Chamel...
Page 6: ...the Gain control to adjust to amount of amplification that your card will produce The standard gain is 50dB with some ribbon microphones requiring as much as 70dB gain 4 Turn the Output control clockw...
Page 7: ...dB to 80 dB in 5 dB steps Output Impedance 100 Noise 115 5 dB Maximum Output 26 dB into 600 Frequency Response 20Hz 20 kHz 1 dB Dimensions and Weight Weight 2 pound 8 ounces Dimensions Width 1 5 Heig...
Page 8: ...in this agreement but no other express warranty is made in respect to the goods The entire risk as to the quality and performance of the good is with the buyer Seller disclaims all warranties either...
