I've been contemplating whether I should add a sub to my K+H O 300D's. They are certainly not cheap, and I'm not sure if I really need them, seeing how the O 300D's already go down to 40Hz flat, and then being a port-less design, it goes lower still and slowly ease off, so I'm guessing it actually goes down to maybe 35Hz or so (especially that it has a protective subsonic filter which rolls off at 6dB/octave below 30Hz)?
So for those of you who did get a sub for your O 300(D)'s, does it make that much of a difference, or should I save my money for some other needed gear?
I have used the 0800 sub with my K+H 0300Ds and it's definitely worth the investment. They open up more and seem to have more 'air' if that's possible. My 0800 kept blowing fuses so I have a replacement on order. Without the sub they are incredible monitors, with it they are exceptional.
I keep hoping that K&H come out with a new model with a stronger or more efficient amplifier.
The 0300Ds are near/midfield monitors and I find that mine are capable of going way too loud where I have them positioned, about 3 feet / 1 metre from my ears. For more volume you should check out the K+H 0410s, bigger and louder versions of the 0300Ds.