Members oldmistergrump Posted December 19, 2017 Members Share Posted December 19, 2017 Hi Audio experts - I'm not quite a newbie when it comes to sound, but definitely no expert. I probably know just enough to be dangerous and end up destroying my equipment, so I was hoping for some advice. I recently picked up a used set of speakers at a price too hard to pass up. I got a pair of EV ZX1-90 mains and a pair of EV SB-122 subs. I want to use the speakers to do very small size DJ set-ups. Mostly modern pop music, so a bit bass heavy, but not at all club volume. The EV ZX1-90s are 8 ohm 200 watts continuous, 400 watts programThe EV SB-122s are 8 ohm 400 watts continuous, 800 watts program My original thought was to pick up a crossover and run 2 amps - one that puts out 400 watts per side at 8 ohms for the tops and a second that puts out 800 watts per side at 8 ohms for the bottoms. Pretty simple and plenty of headroom. Then, I looked at the EV manual that came with the ZX1-90s - They have a suggested set-up using the internal crossover in the SB-122 and daisy chaining the speakers with the Speakon connections to run at 4 ohms per side.So it would go:Amp Channel 1 to Sub 1 in, Sub 1 out to Main 1 inAmp Channel 2 to Sub 2 in, Sub 2 out to Main 2 in They suggest the EV Q66 amp. While I do not own A Q66, I do own a QSX GX7 which has very similar specs. The benefit of already owning the amp and not having to buy a crossover makes this approach appealing. The QSC GX7 is 725 watts per channel at 8 ohms1000 watts per channel at 4 ohms So, here is my question:Would it be a good match to run a single QSC GX7 to drive all 4 speakers, 4 ohms per side, in stereo? According to the EV manual, this should work, but I would have thought that running both a Sub and a Main off the same side, I would be under powering the sub (500 watts when I should have 600-800 watts) and overpowering the tops (500 watts when I should have 300-400 watts). This might be where my inexperience comes in. Maybe with the internal crossover the watts are not distributed evenly? I would like to end up with a nice system that sounds good without having to drive everything to the max, and that won't get damaged by my misunderstanding what I should do. Any help would be greatly appreciated. Link to comment Share on other sites More sharing options...
Members oldmistergrump Posted December 21, 2017 Author Members Share Posted December 21, 2017 help - anyone? Link to comment Share on other sites More sharing options...
Members agedhorse Posted December 21, 2017 Members Share Posted December 21, 2017 I would recommend an active crossover and 2 amps (or you can run mono with one amp, channel 1 driving the subs and channel 2 driving the tops. In general, I would stick to close to the continuous ratings of the speakers unless you have good judgement and make no mistakes. Link to comment Share on other sites More sharing options...
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