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Re: PK SoundThe SW115 is a very stout 18". It seems to be probably about as good as there is available today period. In testing a sub I built with a 4 Ohm 18SW115 I inadvertently caused the bridged MA2400 driving it to shut down but the driver was making no complaints at all. It sounded the same at that level as 10db quieter, just a lot louder. B&C provides comprehensive specs on their products and they are trustworthy. JBL products I'm sure are perfectly good in many ways but if you are looking to use a driver for a particular application (building your own cabinets or putting replacement drivers in an existing cabinet) it gets tough to know whether a product will work well for you if you can't see the specs you need to model it. But clearly JBL's main emphasis is on selling complete loudspeaker systems, not raw drivers to DIY builders or other manufacturers for the most part.That LMS5400 is a great driver for your home theater project for sure. Probably the best available for that application. But that low FS with a relatively small Vas and Mms that is nearly twice the number for the SW115 costs efficiency even with its strong motor. 8 db less efficient than something like the 18SW115. You would need a lot of extra amps and subs to match the output capability. If you want stupid deep LF extension to shake your room down while watching movies though, it is the one you want (assuming you've got $$$$ burning a hole).Loren JonesReason for edit: added Mms comment
Re: PK Sound
The SW115 is a very stout 18". It seems to be probably about as good as there is available today period. In testing a sub I built with a 4 Ohm 18SW115 I inadvertently caused the bridged MA2400 driving it to shut down but the driver was making no complaints at all. It sounded the same at that level as 10db quieter, just a lot louder. B&C provides comprehensive specs on their products and they are trustworthy. JBL products I'm sure are perfectly good in many ways but if you are looking to use a driver for a particular application (building your own cabinets or putting replacement drivers in an existing cabinet) it gets tough to know whether a product will work well for you if you can't see the specs you need to model it. But clearly JBL's main emphasis is on selling complete loudspeaker systems, not raw drivers to DIY builders or other manufacturers for the most part.
That LMS5400 is a great driver for your home theater project for sure. Probably the best available for that application. But that low FS with a relatively small Vas and Mms that is nearly twice the number for the SW115 costs efficiency even with its strong motor. 8 db less efficient than something like the 18SW115. You would need a lot of extra amps and subs to match the output capability. If you want stupid deep LF extension to shake your room down while watching movies though, it is the one you want (assuming you've got $$$$ burning a hole).
Loren Jones
Reason for edit: added Mms comment
