Hello all. I'm thinking of adding a small powered sub (JBL EON518S) to our passive rig which consists of 2 Yamaha S115V's, a Soundcraft EFX8 and a QSC PLX1804. My question regards the output from the mixer. I can't find an answer in the mixer manual. Is the Aux 1 signal affected by the channel EQ's, or is it a flat signal? Should I run it Pre or Post? I want to run our backing tracks and the bass guitar (with a direct out from the bass amp) through the sub. Should I roll off the lows from the mains? Finally, what's the best way to hook the sub up? The JBL appears to have an internal crossover and a high pass. I've never used a sub, and don't want to mess it up!Thanks,Bob
Hi Bob.P.S. According to the schematic in the Soundcraft EFX user guide, Aux 1 is globally switchable for pre or post fader, but will always be affected by the channel EQ regardless of this setting.
On the mono channels, there is definitely a before and after connection at the EQ, apparently... PK is a switch. Perplexing... indeed. Do a test.David
Hi Bob.Personally, I'd keep things simple. Run the LR outputs from your Soundcraft EFX8 into the LR inputs of your JBL EON518S, then run the LR outputs of the JBL into the LR inputs of your QSC PLX1804 and hook up your Yamaha S115Vs as normal. Select the HPF setting on the JBL and turn up the level until you get the right balance between the tops and sub, keeping an eye on the "clip" light to make sure you are not overloading the sub. If things don't sound quite right, try changing the polarity switch on the JBL to see if it makes things sound better/worse.Best regards, SimonP.S. According to the schematic in the Soundcraft EFX user guide, Aux 1 is globally switchable for pre or post fader, but will always be affected by the channel EQ regardless of this setting.
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