I second the multiple mics.
An inexpensive 4 channel wireless setup and for safety to your ears and the gear, A 4 channel single space compressor. Behringer and dbx make decent usable ones on the cheap. Compression and limiting on the mics is much more important than the track.
Take a touch of the mids out of the track (at the mixer) to help singers cut through rather
than trying to place them on-top of the backing track. (Especially sunfly trax)
The rotation rules go out the window on private parties, especially kids Parties.
ART15... OOOOOUUUUUCCCCHHH!!!!
I had a bunch of Art15 and 12 for pro sound use... They are rather heavy (understatement) to be lifting up onto stands. While I absolutely adore them soundwise you should consider the following unless they were recently re-issued NEW in the last two years and I am unaware of this.
The tilt back cabs work very well as monitors and they are HEAVY as hell.
The speaker components have not been made in many years and repairing one
will never sound the same.
The amp modules are rather difficult to fix reliabily.
I would use them as the monitors and toss the Altos on stands if lighter.
I do still have one Art12 for personal monitor use (Fixed 4 times in 10 years).
As far as an external amp is concerned... you are not saving any weight, only cables.
I set my crown on top of the Alto15 or FBT18, loop through the sub w short XLR cables, run one short 12 ga up a speaker stand next to it and one long around the stage.
I use NEO driver 15 cabs I can lift with one finger...really. Easier on the back, and anyone can catch the falling stand/speaker should a drunk slam into it or the wind take it over. (you should use a safety line when possible)
The heavy self powered will snap off the stand if stand is caught, and or send a rather heavy cab into somebody breaking something on their body. USE STEEL stands.
Additionally by using an external amp on the tops you can "fudge" settings to get a little more out of the system as you get more familiar with the components.
Singers HATE it when you push music hard enough to hit the built in amp limiters so that the music drops when they belt. I strongly urge light weight passive tops and ext amps.
PLUS.. if an amp blows in a speaker, you are done....If an External amp fails, spares are EASY to buy these days used and it's a 5 min Swap without running around rebalancing.
Another BIG argument for an external amp:
You realize the gig is too big for two cabs.... now you have to rent/get two more matching powered cabs...OR... simply plug two more in.
If you start with a 100w amp and one speaker and you want 3db louder (not very noticeable), you have to double the amp power 3x. 100-200-400-800w. OR... wait for it,
I said wait for it.... Simply plug in another speaker next to the first and bam.. 3 more db on the same amp!!. Plus less wear on both speakers and less distortion, and
the system will sound "Bigger".
Get a roll around plastic toolbox or tool tote with the extending handle for your main speaker/power/audio cables. Toss in a couple extra of each. Leave it alone for gigs if possible (Grab and Go). Keep the mics, vga converters, other transmitters etc with the mixer rack. ( I keep 4wl n 2 wired plus batts and clips in a rack drawer under the mixer).
Have a second tote of some kind for lighting.
For stands, GOLF club flight containers work awesome and can hold 4 stands and a couple mic stands. The black ones that look like they could hold a rocket launcher. Once again a "Grab and Go" setup.
For a 30" main graphics monitor, I use a guitar amp stand. I added a single bar across the
back of the TV to "Catch" the supports on the stand. provides a tilted low profile setup that a floor monitor (Or the Art12) nestles nicely under.
Good luck and Have fun.
PS. Monitor lifesaving tip...If you use a not so expensive floor monitor... save headache by spraying the 12" or 15" speaker directly with Scotchguard Orange top. DO not do this to the ART!!!!!!. Spilled drinks can be poured right out of the speaker and the night will go on.
I've done shows in the rain with 9 monitors on stage and they survived for years after.
A certain big name speaker manu does this as a "weatherizing" option for $$$.
Wet speakers disintegrate very rapidly.
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Purple Frog Karaoke Cuz we all feel odd and love to "croak"