Quad 2905 versus Quad 2805 plus subwoofer

Yes I live in the Netherlands. In the meantime i have lowered the crossover further to 33 Hz and increased volume to 83db sensitivity. This makes the sub disappear just a tiny bit more. As I said, integration with the Quads is now fine. Integration with the room remains a bit of an issue, especially at lower frequencies. And that is with a (beautifully reconditioned) Quad 33/303 amplifyer with a low cut filter that removes all the really low frequency junk.

My experience with the sub has persuaded my that subs do indeed have undesirable issues with room acoustics. I can make those tolerable by turning down the sub as I did, but that almost defeats the purpose of the exercise. So I am now considering an Anti-mode 8033 room equalization system. I would be interested if there are people who have used one with a system like mine.
Willem

I have 988s fully upgraded by Electrostatic Solutions and with the Mye Stands. I recently bought an REL S5 subwoofer and find that the reviews were correct - it blends in seamlessly with my Quads. I have the REL engaged at around 35 CPS, so the REL supplements the full range Quads. Highly recommended.

I have my sub filter set at 33 Hz and a steep 4th order slope, so probably with a bit less overlap than you have.