Karaoke Forums

Hello there

My current setup consists of 2 EV SX300 FOH, running out of a Yamaha EMX512 SC Powered mixer. Using a laptop to run CDG, 1 electric guitar and 2 Shure SM58s.

For the bigger venues, I feel my setup is not producing enough low end and I would like to include a subwoofer to improve the situation. Is there a way I can connect a single sub, and run it out of the EMX 512 SC along with everything else I already have? I've read some articles on bridging etc., but wanted to see if you guys could give me a clearer picture on whether this is possible and how to do this.

Thanks in advance for your help.

Vic in Sydney

I don't know anything about the mixer, but I do this with my Behringer PMH3000.

I run the tops in parallel in mono from one output, and the sub alone from the other. I use the mono out to the eq, bbe, crossover, then back to the mixer power insert.

  Mixer --> Mono out --> EQ --> BBE --> Crossover --> Mixer power insert A --> FOH tops
                                                                                           --> Mixer power insert B --> Sub

There is a combo BBE/crossover available for $199, single-high.

Thanks MCKY57.

The EMX512SC has a power mode switch that lets you use the two power channels as a stereo amplifier, or you can use one of the channels for the main speaker(s) and the other to drive monitors with a separate monitor mix set up via the channel monitor controls.

Considering that each channel is rated 350 watts at 8 ohms, and the fact that I am using 2 EV SX300s - can I just use one channel for both main speakers, and the monitor channel for the sub?

Will this kind of setup have any impact on my existing volume levels?

Thanks again for taking the time.

Regards - Vic in Sydney

I have the same mixer and what you said is correct. Use the bridged mode, it's 500+500. Mains mono on one channel and the sub on the other channel.
Ok, as far as the sub goes, it depends on which sub you chose.

The Peavey PV118 is a good sub, I've read the reviews and I've heard them at Guitar Center. For the price I doubt that they can be beat. If you look at the power rating for it, 400w program, the Yamaha mixer should drive one just fine. One of those should give you plenty of rich, deep bass for most rooms.

Behringer also makes a good and inexpensive 18 inch passive sub, it's $299.

Another route you can take is a powered sub, however they are heavy and more expensive, but you don't have to worry about the powered mixer having enough juice to power the sub. You send signal through one of the front outputs like headphone or control room out. This is just a signal, the sub has it's own built in amp.

One more thing to consider. You may not like this. Get 2 Yamaha S115V speakers instead of the EVs. The EVs are great speakers, don't get me wrong, I own a pair of EV SX100s and I love them, but those Yamahas are AWESOME, they sound terrific and have lots of bass. The problem with them is they are VERY heavy. I had a pair and couldn't carry them around because they were too heavy and bulky.

EV makes a sub that fits on a pole under your speakers, I think it's the SB122. They are around $350 each new. I've heard them with 2 EV Zx1 speakers on top on poles over the 2 EV subs. They will rock your world. You can crank them at a very high sound level and they sound clear and rich. The Zx1s are $285 each and the subs are $350 each so you're looking at around $1300 in US dollars, a bit more with the poles. This is a real nice setup and can fit in a car, no need for a van. If you have the opportunity to hear this setup you will be amazed.
Hope this helps.

For best sound.

Run your setup the same current configuration. or else you will be under powering your tops

Purchase a powered sun like a Mackie SWA 1501 or 1801 a QSC HPR181i,  Yorkville LS800.

Something with some kick, a decent powered sub will run $800 to $1500

Simply take a line out from the mixer to the powered sub.

I don't know that mixer, but typically the power rating at 4 ohms is 70% greater than the 8 ohm rating. So if that is the case, it would be 600 W or so and that would give 300W to each speaker. Probably still a reasonable match, with 350W to go to a sub.

300W vs. 350W shouldn't be that much different -- don't those speakers want 600 program? I would cross over at a lower frequency, though, as you have more power going to the tops than the sub.

Personally, I finally broke down and bought an EP2500 amp. That gives me plenty of power for both sub and tops -- I use my mixer amp section for the monitors and a rear fill speaker (if necessary).

Now that I think about it, that mixer may a be a bit underpowered for those  EV SX300 and a sub. If I had those speakers I think I would want to feed them more power. The Behringer EP2500 mentioned by mcky57 is a very powerful amp and should have no problem powering your two EVs and a sub, but then you should probably just get a non powered mixer. You can use the EP2500 with the EMX512, but it's overkill. Or you could use the EP2500 for the mains and the power from the Yamaha for the sub.

They should have about 600 watts at 8 ohms (per channel).  If he tied them both to one channel - this would drop the ohms to 4 ohms, the amp would be pushing at 4 ohms & the speakers would now require 1200 watts of power at 4 ohms.

Liquid has the best solution, just get a powered sub & connect through the line out.

_________________
LIKE Lonman on Facebook - Lonman Productions Karaoke & my main site via my profile!

He only has 350 now, so he is currently underpowered.


If money and weight are no object, certainly.

The quality of your responses are absolutely amazing. Thanks Guys!

I would love to buy a pair of SV115, but because I lug my system around practically every other day after a full day at my regular desk job, I need something that won't break my back. I've heard them, and they are absolutely great. Besides, I've already blown a couple of grand on the EVs

Because I am not an expert with crossovers, BBE's etc. I am inclined to go with liquid as this solution will only add one piece of equipment to my setup - a powered sub.

Do you guys see any issues with me running a powered sub out of the line out on my mixer considering the existing setup? Hopefully, your answers on this will help me make a final decision.

Thanks again for all the info everyone!

Vic in Sydney

No problems what so ever. With 99% of the powered subs on the market you need not worry about a crossover.

My only question would be if your mixer has a balanced line output.

Even if it don't many of the newer powered subs can handle unbalanced inputs.

_________________
LIKE Lonman on Facebook - Lonman Productions Karaoke & my main site via my profile!

It appears that only my speaker out and record out are balanced. Monitor out is not balanced and this where I planned to connect my subwoofer. more specs on the mixer are at the following link:

http://www.yamaha.com/yamahavgn/CDA/Con ... 00,00.html

Can someone take a look and put me out of my misery

Thanks Heaps!

Vic in Sydney

You don't want to use the monitor out for your sub, then you will need to use the monitor send on each of the channels & this will become a pain in the butt.  Use the 'left' main output on the front.  This will give the same level control as the main speakers.  
Keep the output switch on L/R main, connect your speakers how you normally would & connect the powered sub to the left main (this is mono so you won't need both outputs) output.

_________________
LIKE Lonman on Facebook - Lonman Productions Karaoke & my main site via my profile!

Lonman

That is the most clear and concise answer I have gotten from anyone, anywhere just yet. All thats left now, is for me to shell out about a grand on a nice powered sub woohoooo!!!

THANKS EVERYONE FOR YOUR INPUTS! I'm sure I will be back.

Cheers!

Vic in Sydney

Lonnie, I bought  the similar Yamaha EMX 312 SC powered mixer for my brothers Christmas gift and we planned on getting a powered subwoofer to use with it, so thanks a lot for the information. We are really happy with its power and features. ( the compressors work well, especially for weaker singers )

The one problem we seem to have is more feedback than with the old Peavy powered mixer he was using. I know there are probably many factors that contribute to feedback and maybe as he becomes more accustomed to the mixer he'll gain more control of the feedback. I was just wondering if you had any tips on avoiding feed back. His speaker spacing is a little tight at this venue and the singer is usually 3 feet behind the speakers. His speakers are the Peavy 215's and with this new mixer they really come alive. I know its a vague question without more details, but any tips would be greatly appreciated. Thanks,
                              Rudy

P. S.
Sorry to derail.

Try adjusting your settings on the eq. I sure its just a matter of doing a good sound check for this paticular venue. I was doing a show in a lager place awhile back and was amazed by the feedback I was getting. After a little fine tuning I had everything sounding great. My bad for not doing a proper setup in the first place...

Thanks!