What's the difference between 2.1 and 2.0 ?
As others have said, for an x.y speaker system, the "x" refers to the number of "regular" speakers and the "y" to the number of sub-woofers.
A few things more to think about.....
Others might have been a bit misleading though since a 2.1 speaker system is not necessarily preferable to a 2.0 speaker setup (aka "stereo speakers") . Usually a 2.1 setup consists of 2 small speakers best for midrange and treble reproduction plus a sub for the bass. On the other hand 2.0 systems may be much larger speakers capable of reproducing a full range of sound (including bass).
In general a 2.1 speaker system will by physically smaller than a (good) 2.0 speaker system (one advantage if space is an issue).
Note that x.1 speaker systems may require the amplifier to support use of a subwoofer. If the sub is self-powered the amp should have a sub-woofer (aka) output jack (although some subwoofers support stereo input via speaker wires and split off the bass frequencies internally, making a subwoofer out unnecessary. Note that bypassing the subwoofer output from the receiver also bypasses bass management in the receiver.
In general, low end 2.1 systems will generate better sound than low end 2.0 systems, but better 2.0 systems will be better than low (or even mid-level) 2.1 systems. High end 2.1 systems are possible, and may be better than high end 2.0 systems (but not necessarily). It all depends on design .... as with most things more money (generally) = better performance.
Should I go for brand like iBall or Frontech or Zebronics instead Logitech,Creative ? There are also brand like Edisier,F&D,Artis etc.
for the budget of 1k the iBall Raaga Q9 is good since it has more than 80% good user review to it's name & it is also has more power than most of the speakers of the same budget 14RMS + It's constructed out of wood which is produces better audio output than plastic construction. The Edifier X100 also has good review to it's name buy it cost is around 1500 Rs if you can increase your budget then as stated above normally more money (generally) = better performance.
