Speakers wiring in series and parallel

Sound system indoors and outdoors will discuss a simple way of mounting the speakers is accompanied by an image with the aim to provide convenience and proper way until we know how much power the power amplifier in a way we can adjust what we do speakers wiring in series and paralell .
Generally it is used for the players sound system outdoors because this technique is very supportive to produce sound from the speakers is adjusted optimally and of course all the power amplifier we have.
For that I am trying to explain it in simple below. . .

Wiring / Wiring SERIES
 > Cabinet impedance is the sum total impedance of all the speakers .
formula --- > Ztotal = Z1 + Z2
 > Power handling of the speaker is the total wattage of all speakers
example :
If using a 2 -watt speakers ohm/200 '8 ' then impedance cabinet is 2x8 = 16 ohms and power handling capabilities so 2x200 = 400watt cabinet

if using 4 -watt speakers ohm/200 '8 ' then impedance cabinet is 4x8 = 32 ohms and power handling capabilities so 4x200 = 800watt cabinet

Wiring / Wiring PARALLEL
 > Impedance impedance speaker cabinet is divided by the number of speakers .
formula --- > Ztotal = ( Z1xZ2 ) / ( Z1 + Z2 )
 > Power handling of the speaker is the total wattage of all speakers
example :
If using a 2 -watt speakers ohm/200 '8 ' then the cabinet is 8:2 impedance = 4 ohms and power handling capabilities so 2x200 = 400watt cabinet

if using 4 -watt speakers ohm/200 '8 ' the cabinet impedance is 8:4 = 2 ohms and power handling capabilities so 4x200 = 800watt cabinet

Wiring + PARALLEL SERIES
 > Usually consist of a minimum of 4 speakers
 > The main requirement of all speakers should be the same impedance and watt ( can be the same if the brand / type it )
 > Cabinet impedance is equal to the impedance of one speaker .
formula --- > Ztotal = ( Z1 + Z2 ) / ( Z1 + Z2 )
 > Power handling of the speaker is the total wattage of all speakers
example :
if using 4 -watt speakers ohm/200 '8 ' then fixed cabinet 8 ohm impedance and power handling capabilities so 4x200 = 800watt cabinet

For mounting the speakers in parallel series advisable to use the speaker with the same type .. Perform installation in accordance with the techniques we will apply and use . . .

This discussion so I'm trying to say is simple, yet hopefully useful for understanding and insight will certainly add to the sound system indoors and outdoors . . . thx