Woofers getting workout, but no bass

Thanks, Doug. I did remove the damping fluid as I didn't like what it did to the sound (I've now removed the damping trough as well).

I wish I knew whether the Doshi worked better in this regard, but it was only recently that I removed the lower grills; I have no idea how long this has been going on.

I did try an old Project Tube Box SE II phono stage that I still have - it has a subsonic filter (18hz with 24db slope) and that worked (not that I would use it as my phono stage).

it has a subsonic filter (18hz with 24db slope) and that worked

there is the answer. there are a few highend stages that have built in filters. Tom Evans comes to mind

Dougdeacon said, "Nick doesn't include a rumble filter per se, but his circuit is designed to roll off around 16 Hz or so IIRC, which helps."

Is that not a subsonic filter?

Bob

"Is that not a subsonic filter?"

Technically, perhaps not, but essentially the same effect most likely from a practical perspective, and perhaps not switchable in/out. Probably a good thing still.

So, this wasn't an issue until the woofers were "seen" doing the dance. I don't think there was much mentioned about "hearing" any issues. Certainly finite detail at low freq. might be improved by defeating the woofer dance, but it usually comes at the cost (price and performance) of additional components in the case of using sub-sonic filtering.

The issue that most miss can arise IF there is not enough headroom in the amp to prevent clipping when those cones are moving an inch in both directions.