Hi all!
I'm trying to make sense of how this rig is supposed to be set up with regards to amplifier power:
2 x JBL SRX715 (tops)
2 x JBL SRX718s (subs)
2 x QSC PL236 (amps)
Firstly, the JBL SRX manual lists the spec of both tops and subs like so:
Continuous = 800W
Program = 1600W
Peak = 3200W
However, the spec for the 718s subs uses the word 'parallel' in the power rating section. Both boxes are listed with an 8 Ohm impedance.
The QSC amps are rated like so:
FTC @ 8 Ohm = 725W
FTC @ 4 Ohm = 1100
There is a table in the SRX manual that states the 715 tops should be driven with 800W to 1600W at 8 Ohms and the 718s subs should be driven with 800W to 1600W at 4 Ohms. Is this telling me that I should be running 4 subs and 2 tops for the correct configuration? What's more, am I severely under powered with the QSC PL236 amps?
The band own the PA and they used to have double the number of speakers (basically 4 x SRX715 and 4 x SRX718s) but they used the same QSC amps at 4 Ohms. So does that mean they had too much top end acoustic power?
Or am I being a complete numpty and not doing my sums right?
