Ohm Walsh Micro Talls: who's actually heard 'em?

Frankly, I would not want to reproduce anything below 20hz with a 180 w/ch amp in that it will run out of steam fast reproducing anything at that frequency.

Larger, fairly high efficiency speakers would likely be needed to do anything below 20hz if present justice at high volumes with "only" 180 w/ch.

One lives dangerously in general below 20hz which is why it is usually off limits for most all recordings and playback systems.

Hi Mapman,
I have been many times to organ recitals where 32-ft pipes were in play. The impact of hearing such bass I find to be very satisfying - "awesome" in the true sense of the word. It is that completeness that I wish to attain. I figure 16Hz should do it.

By the way, there are organs with 64-ft (8Hz), even 128-ft pipes (4 Hz!) - but I don't wish to destroy my house even if such achievement were possible. 8-)

Coot,

Pipe organ music lovers are almost always prime candidates for bigger drivers and more power than most. Powered subs may not be the only way, but probably the most expedient way in most all cases, including OHM.

Just remember that recordings are recordings, not live events. I would not expect much if any music in most recordings below 20hz. The Jean Guillou recording I mentioned above is the one I know that might have the best chance.

Maybe Martykl has that or another recording with music he can measure with his gear down that low. I might have a test CD or test record around still with a 20hz test tone. Or there are tone generator apps on internet and computers that could work with the right connection to assess system performance at the lowest frequencies.

It can be done. Where there is a will (and budget) there is a way....

Good luck.

The least expensive way to assure flat 20hz response that I know of would be a Velodyne SMS-1 bass management system (+/- $500 new, if available) coupled with the appropriate subs of your choice ($1k for a pair of SVS 12" sealed subs would probably do the trick. The SMS-1 is kind of a PITA, but it allows parametric EQ down to 15hz (IIRC) with a basic RTA function that allows the user to (maddeningly slowly) adjust FR for flat response down to that frequency. It has an auto EQ function, but IME it's nearly useless. I'd also note that the high cut function is quite limited in flexibility, but I always managed to successfully work with it when I had the SMS-1 in my system.

It ain't perfect, but with the right subs, manual EQ with an SMS-1 will get you flat to <20hz.

Thanks Martykl.

I think step one will be upgrade power amp(s). Then see (rather hear) where to go from there.

Regarding EQ, I am using Amarra w/iRC. I calibrated closely following their instructions but did not care for what it did to the upper range, so a modified the graph by stopping its effect above 1k IIRC. But it did a good job smoothing out the mid-bass, which is really all I wanted. Of course it does not help with bass extension.