Can I use a SteelSeries Siberia v2 Cross-Platform Headset along with a Spectrum 4xb, 5xb, or 7xb headset?
On the XBox 360, yes. The Spectrum line is not designed for PS3 however, only the Siberia v2 for PS3 is compatible with the Playstation 3 system.
Do keep in mind that the number of headsets you can connect is limited to the number of available jacks you have available both on your TV and console. Please see below for details:
Factors to consider with TV's: number of headphone
and/or RCA jacks. Typically a television will output sound to one source
at a time, ie. headphone and not the TV speakers, or RCA connected
devices and not devices plugged into the headphone jacks. For this
reason, you should select the medium you will connect with (RCA jacks
for example), and consider how many of these connections you will be
able to make with your particular setup. Note that for XBox connections,
the XBox RCA adapter is available for an additional connection so you
should always be able to connect at least two headsets for audio as long
as you have this adapter.
Factors to consider with PS3 and XBox
360: How many USB ports you have available for audio on the system. In
each case, a connection is made via USB for headset microphone input. If
you have a number of controllers connected, it may be necessary to look
into a 'USB Hub' for your system to connect multiple headsets.
4th of February, 2013