Well interestingly, yes and no. At first the experience was that, if anything, the bass seemed to be lacking and the treble was overly bright. Not brittle, but the balance was a little off between the bass and treble, making the presentation a little too forward.
Once the speakers had settled down a little, the bass came back but the experience of it was very different to the FP10s I have had for the last three years. Part of the experience is explained by what I had become used to; bass that was less well defined, less tuneful and lacking in structure. I never felt there was a lack of bass energy in my room from the FP10s but I now realise that a) that energy was poorly structured; everything from about 150Hz to 50Hz was rather smeared together and lacked any kind of discrete structure, and b) the FP10s were doing this because they were actually over energising the room with bass energy. I'd grown used to that so at first the FP15s sounded a little alien.
The bass response is now musical rather than purely energetic and is much more pleasing as a result. The power supply to the LDMS server created a much better balance between mid/treble and bass in my room with these speakers but I still need to tweak things a little and find a way of managing down the brightness just a shade.
I'm thinking that either moving from the 242 output tubes I have in the Lampi to something like a Type 45 (if I can ever find any!) or changing the speaker cables will do the trick. The cables I have now are High Fidelity CT1s, which were selected because they brought brightness and clarity to the otherwise dark sounding FP10s. I also have a High Fidelity CT1-Ultimate interconnect between the pre and the monobloc power amps, which could also be adding to the problem, but since that cable retailed new for £7k+ and I got it for £2k, replacing it with something as good but more temperately tuned to my system is an investment grade I just cannot stomach at this point!
