I currently have 6 of these drivers in some compact ported boxes. They sound great, warm, punchy, and go pretty low (under 40hz), happy to cross at 110hz, but they are not the most efficient. The current ported boxes give 93db at 40z, 1w/1m rising up to 98db. (not measured by me)
I'm looking at some alternative designs to get more output from each driver so probably a large(ish) tapped horn is the way to go. Maybe something like the Apache 15. Does anyone know if that enclosure would be suitable for the above driver, or whether there are better options?
I'd like a good response from 40hz (as a minimum) up to 110hz. If I can something that pumps out 3db or more for the same input at 40hz and above that would double my systems output without having to double my current subs (6 more drivers at 230 quid each plus cabs) and amplifiers.
Driver details below (although mine are the 8ohm verson):
I've no experience with the Apache but your driver is a good tapped horn driver, although a bit inefficient it's similar to some of the suggested drivers for the Apache 15.
Although 3 dB is a doubling of power, it's not a doubling of intensity. 6 dB is a doubling of intensity for subs, 10 dB is a doubling of intensity for tops. The Apache will typically boost output between 3 and 6 dB (frequency dependent).