MX100 MX100C MX101 XP100 MONO OUTPUT MIXERS OPERATING AND MAINTENANCE MANUAL © Copyright 1997-2005, Audio Technologies Incorporated - Printed in USA Audio Technologies Inc. | 154 Cooper Road #902 | West Berlin, NJ 08091 | Voice 856-719-9900 | Fax 856-719-9903 | www. audio.
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.
programmed for microphone level output. A HEADPHONE switch selects either full program or split program and cue. A recessed, thumbnail operated headphone level control minimizes panel clutter and once set, tracks the MASTER output. A pre-fader cue from input one or an external director’s CUE INPUT from a rear panel jack feed the headphone cue circuit thru an internal trimpot.
rack mounting kits. They may also be neatly stacked or mounted side-by side on your desk with the available angled desk mounting kits. Extra knob caps are provided to allow you to color code the input controls. Yellow, red and green caps are supplied in addition to the gray and blue caps on the units. To replace the caps, gently pry out the old cap and press in the new one. CIRCUIT DESCRIPTION INPUT STAGES The inputs of the MX101, MX100 and MX100C are identical.
labeled 48V phantom power. Check the microphone specification sheet for 9 to 52V or 12 to 48V ratings (includes almost all electrets type condenser microphones). Those few RF condenser microphones requiring a full 48VDC for phantom power will need an external power source (generally available from the microphone manufacturer). On the XP100 only, 24VDC phantom power is individually selected for each input with a jumper plug P1, P2, P3 or P4.
HEADPHONES A front panel 1/4” TRS jack and thumbnail-adjust gain control provides a monaural, in phase signal to both sides of a set of stereo headphones. Only stereo headphones should normally be used with the MX100; however, mono phones can be used in a pinch at reduced levels. The headphone output provides 100mW to phones of up to 600-ohm impedance and reduced levels into higher impedance phones.
be externally grounded. This point is low impedance, current summing node on which you should measure nothing other than a DC voltage. EXPANSION OUTPUT The XP100 amplified mixing buss output appears on paralleled 1/8" Tip-Sleeve jacks, J7 and J8. The nominal output is +4dBu through a 200K-ohm source resistance, which feeds the current summing expansion input of the MX100 when so connected. The paralleled output jacks, J7 and J8, allow multiple XP100s to be looped together and into the mixer.
of approximately 500 charge-discharge cycles. The DCA100 DC to DC Converter accepts inputs from 6 to 18 VDC and outputs 24VDC to operate a mixer from 6.0 or 7.2V camcorder Ni-Cd, belt-pack Ni-Cd packs, automotive 12V or 12.0 to 14.4 V NP-1 batteries. The DCA100 requires a standard 4 pin XLR input connector from the battery source (pin 4 positive, pin 1 ground). Adapter fixtures are available for NP-1 type batteries, which can power a MX101 thru a DCA100 for up to 12 hours (13.2V NiMH type).
push left) Repeat for S21 and S31 for inputs two and three. See mixer component location drawing. Microphone Input Gain Set the desired input stage gain for your microphones by setting rocker 2 ON to select 60dB input gain for low output mics, turn rocker 3 ON for 40dB gain for typical microphones or turn rockers 2 and 3 both OFF for 20dB gain and maximum input headroom for high output microphones. LINE INPUT GAIN Gains of 0 or 10dB may be set for line inputs by turning rocker 4 OFF or ON.
lower front and rear cover screws of a single unit, to raise and to tilt it for easy use. In addition, one or more sets of vertical stacking plates, mounting to the upper front and rear cover screws of the bottom unit, allow multiple units to be stacked. Several units can be desk mounted side by side and even stacked side-by-side using horizontal joiner kits together with mounting base and stacker kits. P/N20617-501 is the angled base kit. P/N20617-502 is the base plus one stacker kit (two high).
POWER SUPPLY LEVELS The recommended loaded DC input voltage range is 22 to 30VDC over the full range of AC line voltage tolerances. The audio circuits continue to work with reduced headroom below 22VDC but the LED VU meter will not indicate the top segments. Momentary surges up to 36VDC will cause some increased internal heating, but above 36VDC, call our parts department for some of those expensive ICs.
PERFORMANCE SPECIFICATIONS All units require a 24VDC power supply, which is ordered separately. OUTPUT LEVEL: +22dBm MAX, +4dBm Nominal into 600 ohm balanced or unbalanced lines. Output is selectable +4dBm (Line) or -50dBm (Mic). FREQUENCY RESPONSE: +0/-.5dB 20Hz to 20kHz MX101 only: Switchable low cut filters -15dB @ 20 Hz, -3dB @ 125 Hz DISTORTION: .
POWER SUPPLIES: WA100-1 Wall mount power supply (UL), 24VDC @ .4amp, 115 VAC/60 Hz. WA100-2 Wall mount power supply or Tabletop power supply with IEC 320 Male 3 pin AC input connector, 24VDC @ .4 amp, 230VAC/50 Hz. Rack Mount Kits: 20604-501 20604-502 20604-503 Desk Mount Kits: 20617-501 Angled Desk Mount Base. 20617-502 Angled Desk Mount Base and One Stacker (2 units high). 20617-503 Angled Desk Mount Base and Two Stackers (3 units high). 20617-504 Stacker (2 units high).
FIELD ACCESSORIES: PROK-1 Unit protection kit, which consists of a set of side plates with, attached side brackets. The side plates protect the front panel controls and the rear XLR connectors from impact damage and provide attachment points for a shoulder strap (not included); the slide brackets allow easy quick change of remote power packs. ABAG-1 Wraparound carry case with strap (PROK-1 above is included), houses the MX series of mixers with slide mounted PPA, DCA or BBU power modules.
