Wiring 2 speakers and a tweeter |
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Andygee70
Registered User Joined: 18 July 2012 Location: United Kingdom Status: Offline Points: 59 |
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I don't know if I understand the above post correctly, but the system I currently have is a 3-way system (2 x subs, 2 x 15" EVs and 2 x 12" Evs) so not sure where the 4-way system idea came from. However, there's another reason why I need to sort out the mids and tops - because the band (all 4 of us) own the 4 Electrovoice speakers and it won't really be acceptable to use these speakers for my own PA Hire so I have to source alternatives without having to spend what we did on the EVs. So that's why firstly I was going to sort out a 1000W mid cab to run at 4 Ohms so that I can get the most out of the Peavey PV3800 (which can pump out 1300W @ 4 Ohms per channel). The same was going to be done for the 12" cab - 1000W for the tops @ 4 Ohms. If these were a success I'd duplicate the process. This would then give me replacement, higher powered system that would hopefully service my requirements. If I'm barking up the wrong tree with my plans, I'd rather be told now and save myself a lot of expense and hassle in the long run. |
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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There is nothing stupid about your question. I use capacitors on any driver that is not crossed below 2.5 kHz Best Regards, |
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Elliot Thompson
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lycantheleopard
Registered User Joined: 01 April 2012 Location: san jose ca usa Status: Offline Points: 428 |
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you are indeed barking up the wrong tree imo.
four way to me would be the following. your subs, your fifteen mid cabs, your 12 top cabs as you call them, and whatever horn or tweeter rounds out the top end. if only using the 12s and fifteens of the ev rig, you'd be losing a lot of upper end detail and clarity and i dont think you'd settle for that.
i totally understand wanting your own rig, and that is basicly what i suggested above with the two eighteens per side, two 12s perside, and a psd3006 per side. that is three way, that is your own gear, and that would outrun the ev mids and tops very quickly.
what i dont quite get is why you want or think you want fifteen mids and 12 tops? that is done in a lot of larger club rigs but you would then have to buy more amps, figure out how to stack it all safely, find a horn that can keep up with that much midrange energy, and passive crossovers to go between the twelves and the tweeters or horns you will absolutely need to finish off the top end.
with the dual eighteen, dual 12 and one horn approach, you have a nicely stackable system, you can run one peavey to each sub cab but please be careful as i said because the eminence killamax ratings are inflated and unsafe imo, and one to the 12 and horns through a passive crossover. or, and this is how i would do it, buy a peavey pv1500 or 900 and power the two psd 3006 horns off the outputs five and six of your crossover for ultimate control.
so, just to make sure we're on the same page.
outputs one and two each go to a peavey pv3800 which goes to a dual eighteen subwoofer cabinet.
outputs three and four go to left and right channels of a third peavey 3800 which powers two 12 midbass/midrange speakers per side.
outputs five and six go to a peavey pv900 that powers a single eminence psd3006 on each side.
hope that clears up my intent.
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Andygee70
Registered User Joined: 18 July 2012 Location: United Kingdom Status: Offline Points: 59 |
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Right, okay - I understand your point but I've already got 3 x Peavey PV3800 amps, so why would I replace that with a less powerful model? Anyway, the way we stack the system is one on top of the other (sub, 15 & 12 - a stack each side of the stage) and hold them all dwn with wrench straps and they're as solid as hell. The reason for the 15s was because we couldn't afford another set of ZX3s (the 12s) at 1300 pounds sterling a pair. So to compromise we bought a set of secondhand ZX5s (15s) that became available at half that price and thinking they were going to receive a lot of the mid frequencies we didn't think it a problem.
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Andygee70
Registered User Joined: 18 July 2012 Location: United Kingdom Status: Offline Points: 59 |
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Ah sorry i miss read your post, the other amp would be an additional purchase. Then id have to buy another rack to house all these amps and add to the already stupidly heavy amp system that we have. All Im trying to do is make the most of the gear that Im allowed to use and try and find a way of getting the most out of what's available for me to buy and build without breaking the bank. If i can improve the system by getting it all to run at 4 ohms and making the most of the amps in a 3-way system then even better.
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lycantheleopard
Registered User Joined: 01 April 2012 Location: san jose ca usa Status: Offline Points: 428 |
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you could source a passive crossover from like..radian makes them i think, at 1.2 khz, and then your mids and highs could be powered off the third peavey, negating the need for a fouth amp. it would probably sound 98 percent as good and be easier to set up..i just like that final bit of control..and your current crossover unit could do it so i suggested it.
this would go right back to your orriginal questian, how to wire up two speakers and a horn. well, you would go from the input on the cabinet to the crossover, then out to the dual fifteens from one side, and out to the horn from the other. most crossovers are designed for eight ohms, but i believe the above suggested radian unit can do a four ohm midrange/midbass section.
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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Andygee70 seems to be more of a Rave sound system whereas lycantheleopard focuses on small pubs.
Large rave sound systems require a lot of mid-bass, which is why it is common to separate the midrange into two frequencies (12-inch for higher mid-range & 15-inch for lower mid-range). Sound systems that cater for live work (particularly rock) will use 12-inch driver in a non-horn-loaded bin with a double-eighteen inch reflex. This is usually more preferred than a 15-inch due to having the least amount of mid-bass and more extended highs. Best Regards, |
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Elliot Thompson
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Andygee70
Registered User Joined: 18 July 2012 Location: United Kingdom Status: Offline Points: 59 |
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Ah i see, to the crossover is first in line to the 15s then to the HF driver if parallel? What Ohm will the cab be if all the drivers are 4 Ohm?
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Andygee70
Registered User Joined: 18 July 2012 Location: United Kingdom Status: Offline Points: 59 |
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What do you mean by rave system? Do you mean a bigger system or one dedicated to pre-recorded music? Because Im looking for a system for bands. We've got all the hardware, shure, AKG, Sennheiser and Audix mics, all the cables, DI boxes and monitors.
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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If you use a capacitor on the high frequency driver, the nominal impedance, on two 15-inch 8-ohm drivers, with the high frequency driver is 4 ohms. Best Regards, |
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Elliot Thompson
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Elliot Thompson
Old Croc Joined: 02 April 2004 Location: United States Status: Offline Points: 5172 |
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If you are not familiar with a rave sound system, they focus on using a 12 & 15-inch at different frequencies. If you are doing a live bands use either a 12 or 15-inch for midrange. Best Regards, |
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Elliot Thompson
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lycantheleopard
Registered User Joined: 01 April 2012 Location: san jose ca usa Status: Offline Points: 428 |
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for as low as you will probably wantto cross over from a pair of 12s, i dont reccomend a capasitor, but suggest a real passive crossover. two fifteens or twelves each eight ohm, run through a passive crossover, with an eight ohm horn driver, will end up at four ohms. the midbass/midrange drivers usually dictate the impeedence of the cabinet because they use the most power.
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