you may couple up to 12 units, please see page 2•3 of PDF "XD-V70 Wireless Advanced Guide (Rev A) - English" (http://line6.com/support/manuals/ )
see also in http://line6.com/support/docs/DOC-1957 'Q: How do I connect multiple receivers for rack mounting?' and 'Q: What type of antennas work with the XD-V70 receiver (RX212)?'
Currently Being ModeratedAug 20, 2011 12:26 PM (in response to laplayantonio)Re: RE: chaining 10 units
Thanks a lot for your quick response. As soon as they are bought I will try to chain 10 units first to see wether the system works fine. We mostly play on small stages (10x5m), so I think it will be ok.
While it is possible to chain up 12 units you will get much more reliable performance limiting your chain to 6 units. Since you have 10 units, I would recommend chaining them up in a 5+5 configuration. All the parts are in the box so there is no extra cost involved.
What if you want to reduce the antenna cabling and clutter by using only two paddles and an RF signal splitter? Is it possible to use a 50 Ohm RF splitter like the InStock PD5120 (http://www.instockwireless.com/DC-blocking-rf-power-splitter-combiner-divider-pd5120-fab.htm) to feed two stacks of six receivers? I understand that you would need two splitters, one for the A antenna and one for the B antenna. This splitter has DC blocking on one output so that one stack's DC antenna power bias wouldn't fight with the other stack's DC antenna power bias (we always want things to 'play nice'.)
I have 12 units, and use them 'chained' in two groups of 6 -- single pair of antennas connected for each group of 6.
One thing I did was to connect the antennas in "opposite directions" across the group. That is: if the "A" antenna input on unit #1 is connected to the external antenna (with the terminator on "A" of unit #6), then I connect the other external antenna to the "B" input of unit #6 (with the terminator on "B" of unit #1). This may not make a lot of difference, but (in theory) it may help a little bit to keep the "reception sensitivity" consistent across the whole group.
so now it is time start buying. I will end up with 10 units, and 2 pairs of directional antennas.
Regarding the placement of the antennas: I will have 4 paddles in total:
A for unit 1to5
A for unit 6to10
B for unit 1to5
B for unit 6to10
How close can I place A&A together? In order to keep a clean stage I would like to place 2 antennas on 1 mic stand by use of a T-bar. How large should this T-bar be? Is 40cm enough?
To be clear: I understand that it is important to place the 2 pairs far enough from each other to get maximum reliability.
One other tip. Get the antennas as high as you reasonably can -- so they are above people's heads, if possible. An additional nicety would be to angle them slightly downward, if feasible (i.e. so they point toward the opposite corner of the stage floor).