Who's to blame for the Grain??

First, how is your cd player connected? Digital or Analog? If you are using digital then a tube cd player is not going to help you unless you switch to a non-digitizing pre-amp (or you have analog bypass). If you are using digital, look at the Audio Alchemy DTI, for $50 it will help to remove a lot of digital hash. I went through a similiar situation and decided to split my HT from my 2 channel. Ended up selling my klipsch for less forward w/ss speakers. I chose a PS Audio 6.0 linestage pre-amp which ran about $225. The difference between analog on the pre vs. analog/digital (if your receiver does analog to digital conversion they are going to sound almost the same) on the receiver was much bigger than switching cd players (i had a sony sacd player and a denon cd player). The moster HTS2000 was a big step, although the new 2100 you can get on ebay has a 2800 joule rating vs. the 1775 joule rating of the 2000 series. The power conditioner really helped to lower the noise floor and the anti-jitter filter really made the digital much more livable. I also tended to only make one change at a time so I could get used to living with the components and then making one change and auditioning it with source material I was very familiar with.

If you like the convenience of your multi-disc arrangement, look into purchasing a DAC. If your player only has an optical out, i would recommend a Cal Audio Labs unit. If it has a coaxial digital out, i would opt for an EVS Millennium unit. The EVS is far more refined than the CAL if you can use it, but you might not be able to. As such, i tried to cover both bases with excellent units that offer phenomenal bang for the buck. Some would recommend the MSB unit, but given your current preamp / amp / speaker combo, i would not go that route.

If you need a Toslink, i would recommend either the glass Toslink cable found on Ebay or a plastic model as sold by DH Labs. Coaxial based digital cables come in all shapes and sizes and will boil down to personal preference.

This will give you far more enjoyable music and allow you to maintain the level of convenience that you are currently able to take advantage of. While some will see this as a trade-off, life and system building are all about intelligent compromises. For those that have used such things as a music server or a mega-disc changer, it is hard to adapt to using a single or five disc unit for more than a few reasons. I find that these people tend to use their system less as they find it to be more of a hassle. As such, i think that once a person has gone that route, they are best off to optimize what they have ( within reason ) and have both the quantity that they are used to with much improved quality.

Other than that, you can always upgrade your preamp, amp and speakers while maintaining both a musical and convenient front end. While you may not achieve the most revealing system in this manner, you will probably find it far more user friendly and enjoyable in the long run. Sean
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PS... I don't think that your preamp, amp or speakers are a good match. Changing over to the speakers that you mention will probably not be much of a step forward either. Yes, it will sound "different", but that does not make it "better". Sit down and figure out what your long term goals are and then go from there. Otherwise, you will be joining those that are members of the "used" flavour of the month club.

I have similar problem, but unlike Elizabeth to put the blame on Sony pre, I agree with some other suggestion on the CD player.
My Sony AV can filter "digital hash" much better than some others I have, Nakamichi 410/420, Nakamichi 730, Bryston .4, NAD 302, NAD 7155....
Your system is quite decent in my standard, and base on my experience, your problem is easily solvable.
I once swapped Sony cheapo 5 disk changer to DVP-S530, then up to DVP-7700, but the "grain" is still there, ofcourse less and less, but when I went "down" to DVP-7000, it's 70-80% clearer, finally I found a deal on 7XAES, it's 95%.
Still little grain, but bearable.

The level of grain was not changed with amp, from NAD 2200 to NAD 2600, Bryston 3B, Nak 420, Bryston 9B.

I'm not a cable believer, but I'm looking into it now.

i'm listening

I think I've just fallen in love with a speaker. I've been considering getting the Polk LSI9's to replace my Klipsch Reference Floorstanders. That was until I heard what I heard today. Paradigm Studio 100's. Oh my GOD,,,,,,,,,,,,,,,,I think I finally get it. I've been hearing about tight bass for almost a year now and I never quite understood that phrase. Well I heard tight bass today,,,,,,,,,,,,,,,,,,,,and I'm thoroughly impressed. I think I'm going to get the studio 20's instead of the Polks. I'll complement them with a sub that's known for tight bass (Rel Strata III). It's going to be a long summer. I would get the 100's but my living room is way too small for floorstanders which is why I selling the Klipsch.