Calling all DC DJ’s.

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DJKLEEN

DJKLEEN

DJ Extraordinaire
Mar 31, 2016
652
708
Lafayette la
I am building a dc PA system. I looked at the battery powered stuff, and the technology seems lacking the luster of what I call great performance. I think I will get a large inverter and battery banks to power up a small set. I am thinking my pc, controller, and my set of Qsc 12.2’s.

My question is I want to see if you guys have a dc system and what did you use, besides a genset,,,, I have a genset. The reason for batteries is that I want to use it not only for outdoor use, but in the back of a truck, and then I want to build a three wheel bike with a kick ass system on it!

I got 2 large batteries so far, but can get more! I will buy as many as I need for capacity! Depending on how long I want to play!

I don’t have an inverter yet, so if you have one that you have good luck with, let me know! I want some ideas on setup so if you have pics, let’s see them!
 
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This is what I have so far! The 2 batteries together under a 100amp load stayed at 12 flat! But it may take 2 more to support a maybe 3000 watt inverter for a couple of hours!

Probably a 2000 watt inverter at most! A 1000 watt inverter will,probably work, but I would like to have a lot of headroom, so probably 2000 at least!
 
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I thought about a similar setup, though haven't done anything yet.

As for power, I would assume 2 12" tops and a front end probably pull about 3-4 amps (unless really pushed), so a 120v inverter at 500w running should be sufficient, so I would focus on a 1000w inverter. I used to run a full system with subs under 8A (according to the attached ammeter).

I have been told by a user that this unit was very good: https://www.amazon.com/Go-Power-GP-...r=8-13&keywords=1000w+inverter+pure+sine+wave
 
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steve149 said:
I thought about a similar setup, though haven't done anything yet.

As for power, I would assume 2 12" tops and a front end probably pull about 3-4 amps (unless really pushed), so a 120v inverter at 500w running should be sufficient, so I would focus on a 1000w inverter. I used to run a full system with subs under 8A (according to the attached ammeter).

I have been told by a user that this unit was very good: https://www.amazon.com/Go-Power-GP-...r=8-13&keywords=1000w+inverter+pure+sine+wave
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Yes. Real,world is what I want to hear. What size batts did you use for that 500w?

Good lord. That thing is pricy,,,,, but I bet it is clean!
 
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DJKLEEN said:
Yes. Real,world is what I want to hear. What size batts did you use for that 500w?

Good lord. That thing is pricy,,,,, but I bet it is clean!
Click to expand...
No .. never ran it on battery, just kept an ammeter on my older system to help determine power needs, both for a future battery powered rig as well as to determine how much could run reliably on a single 15A AC circuit.
 
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I use a Marine battery and 800-watt inverter for remote powered ceremonies. I typically run a single QSC K10, laptop, mixer and wireless with it. I typically need less than 1 hour but have never tried to see how long it would run. My guess is, it would run for hours without a problem.
 
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If you're going to build a "true" DC PA system, why convert to 115 AC at all? - leave it DC. You'd have to use passive speakers, but there are some really good Class D car amps out there now (with their own switching PS).

Between Deep Cycle batteries for boats and golf carts, you can get all the capacity you need...the issue is weight. This is also a not a problem if your system (plus long extension cord) is carried in the trunk of a Tesla or Chevy Volt!
 
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