Specifications
Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www.
  audio.com 
PURPOSE 
The MX101 is a three input miniature mono mixer designed for demanding in-the-field 
use in broadcast ENG (Electronic News Gathering) and Field Production applications. 
The MX101 incorporates most of the features requested by news professionals, sports 
announcers, and film and video sound engineers into a tiny and rugged package. 
The MX100 and MX100C Studio Mixers are lower cost, high quality studio mixers for 
applications, which do not require the full feature complement of the MX101 field mixer. 
The MX100C adds an output limiter to the basic MX100 features. 
The companion XP100 Input Expander provides an additional four switchable 
microphone /line inputs and can be used with any of the mixers. 
The MX101/ MX100/ MX100C Mixers may be used alone or in combination with the 
XP100 Expander for any application requiring a compact, rugged and professional 
sounding, mixing or input selection system. Several XP100 Expanders may be added for 
up to a 23 input system with minimal noise buildup in the mixing network. The MX100 
or MX100C alone makes an efficient stereo-to-mono combiner, a simple voice-over PA 
driver with inputs for noise masking and background music, or simply a very clean and 
quiet mike or line input mixer 
Several power modules for field use are available including both replaceable and 
rechargeable 24V battery packs, DC/DC converters for 6 to18V automotive or belt pack 
battery power and plug-in 24VDC wall supplies. An optional rugged Field Pack carry bag 
includes side protection plates for the mixer with quick-change slide mounts for the 
battery packs. 
DESCRIPTION 
MX101 MONO FIELD MIXER 
Three XLR INPUTS with phantom power and front panel MIC/LINE switches drive low 
noise instrumentation preamplifiers with a wide range of internal dip switch selectable 
preamp gains from 60 to 0dB to accommodate either high or low output microphones and 
line inputs. Phantom power can be individually Dipswitch selected for each input and is 
automatically switched off in the line input mode. Front panel switches activate 
individual LO-CUT FILTERS to reduce bumps, thumps, and wind noise and bass build-
up. 
A switched TEST TONE oscillator and a SLATE microphone easily mark takes. An 
intense LED bargraph VU meter monitors the line output and is easily viewed even in 
bright sunlight. A LIMIT indicator and switch shows peaks and limiter action. The 
MX101 provides a high-level line output that will drive either balanced or unbalanced 
external loads of 600 ohms or higher. The XLR output may also be jumper-plug 










