Subwoofer: should we even use them at all?

Bo, please go away.
You have no credibility, nothing to add, and nothing but bluster and me me me me me.
I is your favorite word.

What's the expression, 'its complicated', and it is. Installed and set up properly, matched to the right pair of main speakers, it can add much to your enjoyment of music. Done poorly, it can spoil your existing sound, and make you much poorer. I've matched two subs to my ProAc 1SC's and have fully enjoyed the effect. Took a while to get the crossover right and positioning of the subs in the right place but it was well worth it.

Just think about what it means for someone to say that others shouldn't use a piece of equipment in their home system that they enjoy, and that improves the overall presentation to THEIR ears.

I personally don't think people should put hot fudge over ice cream...ice cream is delicious as it is, and hot fudge only adds unnecessary calories and sugar. And if it's too hot, it can cause the ice cream to melt prematurely. The extra 50 cents to 2 dollars it costs to add hot fudge could ultimately be spent on extra ice cream, or a bottle of water to wash the ice cream down. I've been eating ice cream for many years, so I have a lot of experience on the matter. You should listen to me, and never add hot fudge to your ice cream.

Good question, Elegal.

In my opinion, it depends on the system. If your main speakers are cones, add a cone subwoofer. If your main speakers are Magnepan, add a Magnepan sub. If your main speakers are ESL's, the Magnepan sub just might be fast enough.

I just received my Parsifals last week. I thought they were bass shy initially too. But since the bass is back facing getting the distance right from the back wall makes all the difference. Inches too close and it's boomy, to far and it feels lacking.

Mine is now dialed in and the bass is absolutely standout! Full and well defined. It's been forcing me to play lots of jazz lately just to hear the string bass, vocals drums, etc. Listening to Dianne Krall now - just spooky realism. The staging is so perfect too I just close my eyes and its hard NOT to feel you're in the club with them.

Same thing with Miles Davis before that and Pink Floyd "The Final Cut" prior to that (ok it's not jazz but equally spooky realism).

The bass is suppose to be one of the most famous strengths of these speakers (and I see why). Placement from the back wall is key (along with supporting equipment).

Even side wall placement comes into play according to Verity. They were very helpful and patient over the phone and had some unusual tips. I can't imagine adding a sub would do anything but detract.