Sir Stagea, it is toed in such that the sweet spot is 10 feet from the speakers. I do not know the angle. Sabre metal stands. Im using a NAD 515 CDP, Ecosse MKIV speaker cables, Cal's ICs and Yaquin CD2. Speakers are 2.5 feet from rear wall and 3 feet from side walls. This the maximum placement. Also using a streamline conditioner. I just feel that the speakers are hungry for more juice. I do not play very loud. Usually 9 o clock at the volume knob is sufficient for me. Will a more powerful amp give more detail and clarity at the same volume?m
Well, Ashley mentioned that he recommends at least a C355/C356 for the Imagine B. The C565BEE and the C375BEE are great with the Imagine series, in my experience. However, if you're a full-time analytical listener then you may want to try another brand for your source and amplifier. NADs aren't the most revealing gear, but they make a good balance for most people. Higher model NADs will give you more authority and improvements across the board with more or less a similar house sound. If you're looking for a different sound, then you should start cross-shopping and auditioning your other options.
Start with the basics. Take out the tube buffer and the power conditioner to eliminate extra causes/sources of compression, noise and distortion. The system should be likable at this level, or there is likely something wrong with the matching. Roll whatever ICs and cables you have to get closest to the sound that you're after. You can also bring these with you to your dealer, to simulate your setup with the same gear. This way you can switch between what you have and what they have just to open up possible options (ICs, speaker cables, amps and sources). Once you're back home, fine-tune your toe then play with the tone controls (yes, they can be useful in some systems).
Once you nailed the best combination for your gear, listen to it for sometime to see if it's enough to satisfy you. At this point, you can try adding back the other things that you had in the chain, then carefully evaluate if they make a positive impact (or if they just change the sound).
After doing this exercise, you should have a good idea of whether you need new electronics (or whether you should be looking within the NAD family or from another brand altogether if you do decide to replace your electronics).