Warm Sounding Speakers

Johnnyb53, Bose 901s are continuously being revised. The most recent revision was in 2010. They use an acoustic matrix enclosure and helically-wound aluminum voice coils. You can run them on 10-450 watts. I would love to try 901s, but they will not work in my room. However, I did experiment with Bose 301s and I was very impressed especially for the price. Like Dorgay's description of the 901, the 301 also suffers from "sin of omission", but it does so many things right it boggles the mind that the speaker retails for only $328. If you go too cheap on electronics and cables the 301 will sound dull and lifeless. It really needs to be treated like any other speaker in terms of associated equipment and room placement. I used the 301 on very heavy four pillar stands, sand filled and spiked to the floor and Blu-Tack.
Associated equipment consisted of a vintage Yamaha receiver, Quicksilver 90 watt monos, Quicksilver Full Function preamp, Tandberg 150 watt stereo amp with matching preamp and Audio Research CD3 MKII and Kinergetics KCD-40 CD players. I also experimented with several inexpensive CD/DVD players, but I was not satisfied with the results. My friend Mike is also experimenting with 301s only he will not admit it to anyone lol.

The Krell Resolution II is a really great sounding speaker voiced on the "warm" side and would mate well with your Krell integrated. I traded my pair in to Audio Video Logic - where I believe they are still available for sale. I took very good care of them.

I'm glad I'm not the only one who really likes the 901's! When I had them in here, I loved them but my room is not quite right for them. One side wall is to far away, and pulled the stage to the right to much. Other than that, I loved em!!
Oh...so yes to a nice warmer speaker!

Sonus Faber and Krell has traditionally been a good match and many shows have them playing together.

05-27-12: Audiofreak32
Warm sound will almost always require tubes...

"Almost always"? I don't think so. Warmth is a tonal balance thing and any number of speakers are voiced this way and speaker placement has a lot to do with it too. If you're talking about smoother highs, there are plenty of SS amps that do that too. Also, some speakers have etched or edgy highs, others have smooth and well dispersed highs.

I have a pair of Mirage M5si's and with their mid-20's bass extension, bipolar radiation pattern, and well-damped titanium dome tweeters they are definitely warm no matter what powers them. I have powered them with Forte, VSP Labs, Carver, and Adcom. The speakers sound warm with all of them.