I had a very nice and long conversation with Lars this morning. Here is what I took away from the conversation - There is NO bass upgrade kit for the D3's or any Raidho speakers.
Lars and Michael are really at the forefront of speaker design. They know EXACTLY what the Raidho speakers can and cannot do. Do the Raidho speakers have limitations? Yes they do. What are those limitations? If you try to drive them too hard ESPECIALLY in a very large space and especially with possibly not an ideal amplifier(s) match, it is possible to overdrive the speaker or in many cases the amplification that is driving the particular Raidho speaker, might clip.....it's just physics. One of the issues is that the sound of the Raidho is so clear and clean that there is a natural tendency to keep turning them up.
With the Raidho speakers, one of the finest family of speakers to have come along in a long time, you should be aware of your environment when choosing your particular Raidho speaker, ie. Size of your room, what type of music do you normally listen to, how loud do you play your music, what type of amplification are you planning on using etc. Case in point, if you play Zepplin at 105db in a large space and that is your thing (which there is nothing wrong with) then you are probably going to be best suited best with another type of speaker. The Raidho speakers or ANY other speaker for that matter are not going to suit everyone's requirements. That's ok. It really doesn't make sense to be asking speakers with 5ish inch drivers to be moving air in a large space at max pressure levels with highly dynamic source material. Why would you choose a Raidho speaker if this is your set of requirements? But don't say it should be doing something that literally it was not designed to do.
The way Lars and Michael have designed the speakers and their specific choice of components are what gives the Raidho speakers that magic that they deliver. Sure they could put larger drivers in the speakers and move more air and would not ever be over driven.....there are a thousand speakers out there like that.....the Raidhos do what they do because of the drivers that are used and yes they have limitations, but actually for most listeners they would never even reach the limitation level anyway.
If you would like to listen to either classical, jazz, light rock, regular rock, opera or really whatever genre of music and have an average size listening space, and appropriate "quality" amplification vs. "quantity of watts"....watts are definitely not the same among amplification manufacturers AND you are ok with listening in the 90db to 95db range and even higher with MOST source material, then the Raidho speakers which can deliver a soundstage that is literally gigantic (side to side and front to back) with the highest resolution of the entire soundstage that these ears have ever heard, then the Raidho's might be for you. Additionally layering and a "suck you into the music" sound that is provided by Raidho is really as good as it gets. Of course personal preference is always paramount but in general the Raidhos can reach heights until recently were unattainable. You just have to understand what the Raidho speakers can and cannot do. Then see if this all works for you or if not, that's ok as well. But don't say "Why can't that fish fly"? That's not what fishes were designed to do (except flying fishies I guess). Understand the Raidhos and their capabilities and limitations and see if they work for you.
Sorry for the long winded reply!
