Just finished a build for a gent using the new GPA 604-III's, with the stock GPA x-over.

The client is very happy with the mids and high frequency...but feels the bass is lacking.

The units sit in large 240 litres Stonehenge V boxes, double walled ply, with three internal walls damped.

To bring up the bass, should I just add a simple attenuator, say, for the HF?

Would bi-amping be a better path to follow?

Other suggestions appreciated.

Todd, if you see this - any response?

Andrew