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Originally Posted by eviljohn2. We were all surprised that the 909 didn't really add anything over the 309 - both had an enormous dropoff at the same point which seemed odd as the 909 has a much bigger cabinet and driver so has more potential for the lower notes. Perhaps there is a low-cut filter in the MS electronics? I suspect the added size will come into play in a larger room as the 909's amp was set to about 30% whilst the 309's was at about 45% showing there's far more in reserve for big brother. Enough to warrant a £200 price hike? We weren't sure. |
Apparently this was "forseen" by two of our engineers and they are doing a bit of rooting around for some near field data done in the (big) old listening room we had on the south coast. There is some engineered in drop off but (I'm told- my room isn't big enough for this either) that with the 909 running with about 60% on the volume will do a proper tail off over the 309. All of which means squat in a smaller room.
The real lesson I learnt from Saturday is that, when properly calibrated in small rooms, the only lasting difference between big and small subs is space consumption- 75db in Dfours room meant that all the subs were running pretty gently and that whatever party pieces the big subs do at higher volumes is broadly irrelevant. I suppose the other things I learned were that the KEF 2500 is
much better than the egg sub (MKII) and more impressive than I thought it would be.
Oh and that Kaz has a very nice motor as well
.