Amp for running 6x Oberton XB1500

We have used FFA 10k for 1700 w b&c's before now... surprising how much punch they pack

there is no such thing as underpowering in Speakers.
Even the often repeated danger of clipping is only a Problem because it may decrease the crest factor from 1,41 (sine wave) down to almost 1 and therefor, the amp might actually overpower the Long term handling of the Speaker when the limiters were set for program power.
In a Front Loaded Horn however, you Need to set a RMS or true power limiter at 1/3 of RMS power handling, otherwise you will burn your Speakers with heavy bass Music material.
so following the same rule most People suggest (having double the power / +3dB headroom for the Peaks in the Signal above Long term power handling), you would be looking for an amp capable of 3000w per channel into 2,7 Ohm.

Please note that i personally will say (and have allready said and beeing shot down for it) that there is no sense behind the "double rms power for amps" rule. Sure, it is crucial to have headroom! But +3dB? thats a joke when you look at Music waveforms. Either go 6-10dB (surprisingly, thats how the pros run their rigs, amp max output vs. Long term power to the speakers...)or you might aswell just go for a cheaper amp with 0db headroom above RMS power handling. Thats just my opinion though!

corell wrote: there is no such thing as underpowering in Speakers. Even the often repeated danger of clipping is only a Problem because it may decrease the crest factor from 1,41 (sine wave) down to almost 1 and therefor, the amp might actually overpower the Long term handling of the Speaker when the limiters were set for program power. In a Front Loaded Horn however, you Need to set a RMS or true power limiter at 1/3 of RMS power handling, otherwise you will burn your Speakers with heavy bass Music material. so following the same rule most People suggest (having double the power / +3dB headroom for the Peaks in the Signal above Long term power handling), you would be looking for an amp capable of 3000w per channel into 2,7 Ohm. Please note that i personally will say (and have allready said and beeing shot down for it) that there is no sense behind the "double rms power for amps" rule. Sure, it is crucial to have headroom! But +3dB? thats a joke when you look at Music waveforms. Either go 6-10dB (surprisingly, thats how the pros run their rigs, amp max output vs. Long term power to the speakers...)or you might aswell just go for a cheaper amp with 0db headroom above RMS power handling. Thats just my opinion though!

Or were you refering to their program power meaning you reccomend 1000? Seems a bit less baffling but even still...

A lot of the time when people say "i feed x drivers with 1000W" thats not really whats happening,  it might be an amp capable of giveing 90V rms at 8 ohms / "1000W"  at clip but with signal crest factor and resistance rise they might only be getting 100W of actual power.  

Thank you though Time bomb that was very helpful