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<blockquote data-quote="Andrew Prince" data-source="post: 6766" data-attributes="member: 1808">Hi all!I&#039;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 = 800WProgram = 1600WPeak = 3200WHowever, the spec for the 718s subs uses the word &#039;parallel&#039; in the power rating section. Both boxes are listed with an 8 Ohm impedance.The QSC amps are rated like so:FTC @ 8 Ohm = 725WFTC @ 4 Ohm = 1100There 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&#039;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?</blockquote>

[QUOTE="Andrew Prince, post: 6766, member: 1808"] 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? [/QUOTE]

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