I'll echo what all the others here have said. Spend your money on better speakers. Your idea of the Parts Express kit for the TriTrix MTM speakers is a very good one. Build the kit. You'll have fun and be rewarded by some decent sounding speakers. They have a well-designed crossover and cabinet bass tuning that is realistic, not exaggerated sounding.
You won't hear a difference by replacing the CD player with a different player or a DAC. As BoredSysAdmin said, keep your CD player as long as it works. I have an old Sony from the early 1990s and I cannot hear any difference in CD playback between it and other DVD or BluRay players I've had.
Also forget any idea of tweaking the existing crossover in the CV D-1 speakers. I found a thread on AudioKarma (also known as the tweaker-fool's paradise) describing someone's efforts to "rebuild" the crossovers on his D-1s. Don't bother, you will not hear any difference in sound. Most of these crossover rebuild threads make the false assumption that changing the brand of the capacitors to something more expensive will improve the speaker's sound. That is no more true than using expensive speaker cables.
It's my guess that these CV D-1 speakers are not likely to be improved even if a competent crossover designer worked on them. I did look for a frequency response curve, but found none. And I haven't heard them. So these are only general comments:
- These are 2-way speakers with an 8" woofer and a small horn loaded tweeter, with a 3,000 Hz crossover frequency.
- No 2-way with an 8" woofer can do mid range with any justice, especially if it goes as high as that crossover freq. There will be a large hole in the off-axis sound, and it is also possible that the woofer is already making break-up noise at that high a frequency.
- Making the crossover lower is probably not a realistic option (without measurements) because that tweeter may not be able to go lower without significant distortion.
- And finally, CV does have the long-standing reputation of tuning the bass response of their cabinets to exaggerate the bass in the roughly 75-200 Hz range. It creates loud sounding bass, at the expense of making the bass ring on and on. It muddies up the sound of the upper bass and lower mid range. So no tweak short of building new (probably much larger) cabinets will improve that.
I don't really take any pleasure in dumping on speakers you seem to like. I'm only trying to explain why you shouldn't waste your time & money trying to improve them. Spend a month or so listening to the new TriTrix MTM speakers, and then hook up your CVs and compare them. You may be surprised by what you hear.
