Dynaudio C1 Bass

Wilmak - yeah, if you are missing bass in the 60 - 80hz range, then it is a 95% chance you've got a room-induced bass suckout with your current position.

Spend some time moving the speakers all over the place and testing, and also moving yourself around to see where in the room the bass is heavier. Rooms can easily do +/- 15 DB in the bass based on acoustics.

Can you measure the frequency response? There is free software called "roomeqwizard" and I believe all you need is a radio shack spl meter that will work as a microphone with it do to a complete freq response chart. That would def. shed more light

I heard some audiophile comments saying that C1 requires an extensive run in period like 6-9 months with 8 hours playing time per day. Before that, you cannot have descent bass. Any comments on that?

I don't think any speaker will take 6+ months to break in. I have owned many Dyn in the past, they do loosen up after about 100+ hours. Yes, they might improve over time but should not take 6+ months.

"extensive run in period like 6-9 months with 8 hours playing time per day. Before that, you cannot have descent bass."

A blatant lie. Play them overnight for a couple days and you will have "decent bass" as you say.

You haven't really answered these questions...

1. Can you measure them? 1 measurement chart would tell the complete story instantly. Go buy a radio shack SPL meter for $20 or whatever

2. Have you experimented with placement?

I have owned my C1's for about two months now and they have rock solid bass down to the mid 30 hz. range.
Right out of the box they had much more bass output and extension than my previous much larger floorstanding Canton Vento 809's.
The problem sounds like a room/phase related issue.