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[Josh Billings]

Josh - Does this budget have to include any power distro, cases, wheel boards, monitors, mixers, microphones, stands and other bits and pieces to make it a "system"?

No, like I said, I'm usually limited to the circuits I can plug into: 2 (MAYBE 3) 20 amp circuits. Monitors, mixers, etc. I have already.

[Scott Holtzman]

No, like I said, I'm usually limited to the circuits I can plug into: 2 (MAYBE 3) 20 amp circuits. Monitors, mixers, etc. I have already.

3 circuits wired to a panel with 20amp breakers would give you close to 9000watts available continuous power.  The amps aren't 100% efficient but they are in the mid 90's.  As an example the Orbit Shifters are 103db sensitivity I have you 3db for a boundary figuring you have at least one wall close by so 4000 watts gives you 132db at 10ft.  You can use the inverse square law to figure out your loss from that point.  For each doubling of distance you lose 6db.  so at 20ft you would be at 126db SPL. at 40ft 120db SPL et al.  So three outlets would give you 1 for each stereo amp for the subs and one for the mains.  Music isn't a sine wave so you have time to replenish the energy storage in the amplifier so it draws from the amp not from the mains.  That's why you can get away with that 30% factor I added to the circuit.  Additionally thermal breakers don't blow at 21amps, they have a thermal curve and you can get some pretty decent power above the rating depending on the bass density of the source music.   

[Mike Pyle]

I have a RCF TTL11A column system I'm considering selling that would tick all your boxes, provided your ceiling height will accommodate it. I can set it up by myself in less than 15 minutes.

[Bob Stone]

I have a RCF TTL11A column system I'm considering selling that would tick all your boxes, provided your ceiling height will accommodate it. I can set it up by myself in less than 15 minutes.

Uh...tick all of the boxes except having any subwoofers?

[Frank Koenig]

To make lots of noise on little electricity you need efficient speakers – irrespective of budget. A single Danley TH-118 has roughly the output of two bass-reflex, direct radiator 18s. They are  pretty easy to handle for one person assuming no stairs or muddy lawns. I have run tops plus four TH-118s on a single 120 V, 20 A branch circuit with no difficulty, although not on super bass-heavy program and I don’t know how much margin I had.

--Frank

[Mike Pyle]

Uh...tick all of the boxes except having any subwoofers?

You mean those things the columns mount on top of?

[Bob Stone]

You mean those things the columns mount on top of?

I was curious on specs on them, so I googled and it keeps showing just the column:

[Dave Garoutte]

To make lots of noise on little electricity you need efficient speakers – irrespective of budget. A single Danley TH-118 has roughly the output of two bass-reflex, direct radiator 18s. They are  pretty easy to handle for one person assuming no stairs or muddy lawns. I have run tops plus four TH-118s on a single 120 V, 20 A branch circuit with no difficulty, although not on super bass-heavy program and I don’t know how much margin I had.

--Frank

Also, the Danley amps are super efficient (and expensive), and can limit the amount of current they draw: EBP = electic breaker protection. Set it to 19 amps and you'll never pop a breaker.

[Mike Pyle]

I was curious on specs on them, so I googled and it keeps showing just the column:

https://www.bhphotovideo.com/images/images1000x1000/rcf_ttl11_a_ttla_h_ttla_b_ttl11a_active_digitally_steerable_1082286.jpg

The system is 4 way - subwoofer, bass column, mids and highs in the top column. I have 4 of the TTS26A subs but have never needed to use more than one per side, even covering some good sized dance events.

[John Schalk]

Four JTR Captivator 218 subs = $10,500 plus tax & shipping
Two used Crown I-Tech 6000 amps = ~$3,200 on the used market. Note - out of support from Crown
If you have system DSP then two used Crown MA-5000i amps would be a perfect match for the JTR subs

An I-Tech 6k draws 11.6 amps at 4 ohms stereo & 1/8 power, so put one sub amp on each of your two 20-amp circuits and you should still have enough for some loud tops, if they're efficient.  The Crown MA-5000i is 2,500 watts @ 4-ohms stereo and draws 8 amps at 1/8 power.  The Powersoft K3 has essentially the same figures.  Both of those amps match up with JTR's 2,400 watt recommendation for the Captivator 218 and would leave you ample "headroom" on your two 20s.

I have run a system with two K3s plus another amp, plus backline gear and lights off of two 20-amp circuits before.  Often.  I have never used JTR's subs, but I should think that four Captivator 218 subs would cover 500 people, especially if we're talking indoors.

[ProSoundWeb Community]