NorthofSixty

Over 20 years of auditory abuse probably means I won't be able to hear anything below 30Hz anyway. I am really starting to like the concept you have proposed more than my original passive radiator idea. I normally use white noise and an ADC SoundShaper Mk-III parabolic equalizer to set up the LS for room accoustics. As such, I am not much for subwoofers because I find them too difficult to balance with the mains for audiophile purposes. I only use a sub for home theatre purposes where feeling is as important as hearing the lower frequencies. I also drive the speakers with a vintage Dynaco Stereo 400 amp which has lots of smooth low end punch. Coupled with the SoundShaper Mk- III I should be able to fine tune the ported design to compensate for any low end rolloff. thanks again.

Thanks, Looks like the K 53-K will do just fine. Would you know where I can get the physical dimensions of the horn?

I am looking for a pair of low wattage mid horns to liven up an old set of speakers. I see various models for sale on eBay but no technical information is usually given such as frequency response, impedence, wattage or even physical size. Is there a list the various Klipsch mid horn models with their specifications available anywhere for reference.

Thanks, Both great ideas. If the passive radiators do not produce good quality results I'll probably try the first concept to see how they perform. My enclosures are in pretty rough shape so if I like the results I would try building the second concept into new cabinets. The advantage of the second concept is that it does not add any height or, more importantly, weight to the existing cabinets. In fact it would reduce the weight slightly.

Hi, I own a pair of early model La Scala Industrial speakers that still sound wonderful but the cabinets have seen better days after many years of use on the road. I am now retiring them to home theatre and stereo duty. I would like to try a modification to the speaker to smooth out the base response but thought I would pass the idea on for an opinion first. What I propose to do is remove the bottom plywood cover for the bass driver access and install a 15" passive radiator in its place. In particular I would use the 15" SLAPS radiator from the EarthQuake SuperNova MKVI-15. The La Scala's would be raised off the floor on a base to give the radiator room to work. The other alternative would be to place the passive radiator in a subwoofer cabinet constructed to match the width x depth of the La Scala. The bottom of the La Scala with the access cover removed would form the top of the subwoofer cabinet. The first option maintains the original cabinet and volume for the 15" base driver. The second option substanially increases the volume and alters the shape of the bass cabinet. Has anyone tried something similar? What were the results?