Multichannel distribution systems are generally constructed of but not necessarily limited to the following basic building blocks:

1. Input and/or output boxes, panels and wallplates
2. Multipin - multipin interconnect cables (C Series)
3. Inline multipin to connector fanout (FM series)
4. Chassis multipin pre-wired to tails (PK series)
5. MASS Punch termination punchdown blocks and panels
6. Labeling and engraving

Follow these simple guidelines to ensure that the system you want is the one we deliver.

1. MAKE A DIAGRAM. Include all of the boxes, panels and cables. Specify each connector type and gender, all lengths of cables and indicate all labels or engraving.
   
   
2. Follow these design rules to ensure system and connector compatibility:
   
   
   • When specifying connectors, a male connector must always mate with a female connector.
   • Male connectors are those with exposed contacts (pins) and female connectors are those with recessed contacts (sockets).
   • For Whirlwind W3, W4, W5 and W6 MASS and MicroMASS connectors which have both male and female contacts, it is necessary to change connector gender terminology to "Wired as OUTPUT" (O) and "Wired as INPUT" (I). An OUTPUT MASS connector must always be matched by an INPUT MASS connector. (See FAQ - Wiring MASS Connectors for a complete explanation of MASS connector wiring and terminology.)
   
   
3. Remember, the total number of input and output channels cannot exceed the capacity of the multipair cable and multipin connectors you are specifying. It seems obvious but can slip by when changes are made. If you specify 32 inputs with 16 returns (48 total channels), you can't use a W3 with its maximum capacity of 40 channels.

---

STAGE BOXES AND RACK PANELS This is the starting point where your mic lines are connected into the system and where microphone splitting may take place - either parallel or with transformer isolation. Also, provisions can be made for ground lift switches, multipin subsnake inputs and return lines sent back to the stage from the mix position. You may specify EIA 19" rack panel or free standing, fully enclosed steel box. Rack panels are .090" thick aluminum and available with or without backbox enclosure and boxes are 14-gauge cold rolled steel with black powder coat finish. When using multipin connectors, follow the previously outlined design rules to ensure compatibility with other systems in use around the world. When splitting signals, remember that phantom power will only pass through a direct or parallel split connection. Transformer isolated splits WILL NOT pass phantom power. Please refer to tech article Microphone Splitters for more in depth information regarding mic splitters. Refer to the chart found on Stage Boxes and Rack Panels to view and specify the most common options requested with boxes, panels and split outputs.

C SERIES MULTILINE INTERCONNECTS These multipin-to-multipin cable assemblies are designed to interconnect the components of Custom Multichannel Distribution and Concert Series systems. These cables use Whirlwind inline W-Series multipin connectors: (W1 for up to 12 channels, W2 for up to 20 channels) or MASS series connectors (W5 up for to 16 channels, W6 for up to 28 channels, W3 for up to 40 channels and W4 for up to 58 channels). The standard mating configuration of these cables is a male multipin on one end and a female on the other (for W1 and W2) or a MASS connector wired as an INPUT on one end and a MASS connector wired as an OUTPUT on the other (W5, W6, W3, W4). Construct a part number from the chart found on Multipin Interconnect Cables (C Series) .

FM SERIES MULTIPIN TO FANOUT These interconnects "fanout" your channels from a multipin input to individual connectors. Individual mic channel connectors are WI3M numbered XLRs and return line connectors are lettered WI3F XLRs or 1/4" TRS plugs. Fanout lengths are 3' up to 28 total channels and 4' for 28 channels and up. Construct a part number from the chart found on Fanouts .

PREWIRE KITS (PK) These pre-wired chassis multipin assemblies will greatly simplify your installation. Standard PKs feature a multipin connector wired to blunt tails but may be custom ordered with varying length pieces and/or with individual connectors pre-wired to the tails. Available with individually jacketed and numbered foil shield 2-conductor (PKS) or Whirlwind multipair cable (PK). Standard PK part numbers can be constructed from the chart found on Multipin to Tails Pre-wire Kits (PK Kits) .

MASS PUNCH BLOCKS AND TERMINATION PANELS

Developed by Whirlwind and ADC engineers, the MASS punch system provides a solid, gas tight connection system that can be terminated quickly and easily in the field. ADC's Quick Connect Punchdown technology completely eliminates tinning and soldering resulting in a significant reduction of assembly and maintenance time. These punch blocks are also available prewired to multipin connectors and mounted on plates or panels. This greatly reduces the complexity of assembly in the field and allows for quick and easy re-configuration. See more at mass01.html .


ENGRAVING SERVICES

Promote your company, permanently ID your cables and equipment and add that extra touch of professionalism. Organize functions or even add your business logo to your connectors panels and plates. See more at engrtour.html .