How can I raise the height of the sound stage

Perhaps some room treatment on your ceiling above your speakers.

get polarity correct.

(both signal and AC).

rhyno

In addition to what Rhyno said make sure your phase is correct. Check to see if any of your pre/power/cdp inverts phase or not.

Regards,

Check to see if your tweeters are working.

Hi Nke,

I have listened to the Quads, and loved the sound but found the soundstage to be exactly as you describe. I would recommend that you look for some stands for the Quads. Here is an example:

http://www.stereophile.com/loudspeakerreviews/416/index12.html

Good luck,

DuffyDawg