Comments on system plan

I am in the process of thinking up my system and would like some feedback on my current plans.

System plans (per side)

3-4x Folded horn (40Hz -140Hz)

2 x horn-Top (140Hz – 16kHz)

As P.Audio have a distributor here in SA, I was thinking of using their speakers for the Sub and Mid. I will try and source Oberton 1,4” drivers for the Top end, perhaps on a Selenium HL14-75 SLR with adaptor or a conical waveguide of sorts (40 degree horns are a little rare)

4 x C18-600EL/600LF in 40Hz folded horns
M=0.55 St = 590 Sm = 6000 length 2.1m, VB = 60l

1 or 2 PAP Porn horns per Top (2 of) loaded with SN-12B

Oberton 3672 driver on narrow dispersion horn/waveguide, cross 1k5 or lower.

As money is a huge concern, amping will have to be Behringer EP2500/EP1500 for now (money is at a premium here) and crossovers will likely be the Diverack PA or the Behringer Ultradrive.

If the Horn-tops turn out to be too costly, I am thinking of a 15”/1.4” similar to the X15 for tops, which could later be used as monitors/near-fills. I might start with these15/2 tops and move on the horn tops as I progress. The 15/2 Boxes would then serve as near-fills and stand in at smaller events. I was also thinking of a 12”/1” and a bass-reflex single 18 (C18-650EL) as a mate wants a party system to go on tour to Mozambique with.

Application for the system would range from out-door concerts (where I’d hire the other equipment), tents to mobile-disco events. I am doing this with a mate who is a free-lance sound-engineer and I have some contacts to the local Radio station who organize a fair number of events. Music would be anything from hip-hop, techno through to rock and metal or acoustic (basically anything). I would like to get the system ready in time for a new-year’s bash.

Your harshest criticism and alternate driver suggestions are most welcome

Martin

PS: this would double as my Home theatre system when in storage ;-), driven my my SB Live! and kX drivers.

elliot: (correct me if im wrong martin) because the porn horns won't go down to 100Hz. If he's using 40hz bass horns, i'd be very surprised if they didn't sound pretty good right up to 160-180. i've found the porn horns sound best crossed at about 140Hz, below that they just can't equal the punch of hd15s (and certainly not of 4x18" horns). how big's the diaphram on that oberon by the way?

Thanks for the input.

The Mid horn is speced to go down to 130Hz (dunno under what conditions) and is pretty big as it. Obviously the lower the x-over the better, but then the mid's get a whole lot more of the mid-bass and the tops might run at their limit sooner. This is one of those things that one'd find out when one hears the completed system, as folded horns are said to be a bit unpredictable going from design to practice.

The sub would be similar in design to the Martin Audio WSX, though I am considdering a snail fold (difficult with an 18" driver). As an alternative, I could use an Oberton 18" driver with 12mm x-max (@10% distortion) and BL of 27 but cost and especially the difficulties involved shipping these things makes life difficult. Beyma is an alternative, but for the money I recon P.Audio is a good deal.

Martin

Thank you loophole, and, Timber_MG.

It makes things more clear.

 

Best Regards,

 

 

 

Let’s for the numbers game keep to legal levels ;-) I was reckoning with about double your estimate, but as you say this varies strongly bassed on the application. Locally, I have seen smaller system serve crowds of 400, but then things are different here.

The Oberton Top as displayed on the website is the old model which used the BMS co-ax. The new model double 12/1.4 (T212) sells for 1420 Euro’s plus VAT + shipping from Bulgaria for countries not served by an Oberton distributor. They re-designed the HF section and made the whole cabinet look 10x more professional. It's a 60 degree horn though, so stacking multiples may become and issue.

Apparently, both Oberton and BMS are produced and engineered in Bulgaria, just BMS have their HQ in Germany. Both seem like very good manufacturers and provide good value (even if they’re not always cheap)

Regards

Martin

Whoops. Peter from Oberton must have been fibbing then.