Swapping RL-p15 for RL-p18 Discuss Swapping RL-p15 for RL-p18 in the DIY Speakers and Subwoofers forum; Swapping RL-p15 for RL-p18 I may have the opportunity to swap my 15s for 18s. I have a Klipsch THX Ultra2 system with KL-650 ...

**atledreier** · **01-20-10, 06:14 AM**

I may have the opportunity to swap my 15s for 18s.

I have a Klipsch THX Ultra2 system with KL-650 LCR and KS-525 rears.

The 15s are driven by an EP2500, in LLT 13Hz sonotubes. They do a good job, but there's no substitute for displacement. I would make new sonotube LLT enclosures for the 18s.

What would the benefits be, and would it be worth the effort? I can comfortably do reference level with any program material with my 15s. What kind of extension would I likely see? My 15s reach around 11Hz at reference with no complaints.

**fackamato** · **01-20-10, 09:23 AM**

You'd gain around 5dB around 20Hz I suppose?

**atledreier** · **01-20-10, 04:27 PM**

Yeah, 5dB that I really don't need... Although, 5dB better sensitivity translate into less distortion, and maybe enough displacement to experiment with an IB or something....

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