tube amp for b&w signature 805

The opinion of Bigkidz regarding B&W and SS is a common one. However, I had success with several tube amps with even more expensive B&W designs like Silver Signature, Signature 30, and even Nautilus 802 and 801. What you need is a powerfull tube amp with good speed and bass control. I've had good results with Aronov LS-9100 monos (I just sold my pair, but there is another one on gon right now , upgraded version, priced quite low). Also, Air Tight ATM-2 is a great for B&Ws, they pop up sometimes at under $3000. Audio research VT-100 MkII might work too, In fact, I am using one right now with my Sig 30. Might be selling it soon to go for CAT JL-2.
Just avoid single ended low powered amps, they don't have enough juice for B&W. If you go for solid state, there is only few which would satisfy you as a tube lover. The best for your speakers would be any Symphonic Line design. RG-1, RG-4, RG-7, if you can find it.

Good luck

Good luck

Bigkidz

Yes, I compaired a few amps in the same system.I just looked at your system and it's very good. You are using Pass, which is on the warmer side. The only area you might need improving could be the speed. As i mentioned above, for my taste, the best SS amps for B&W are Symphonic line. I think it's the only design which replaces tubes being super fast at the same time.
You have a monster $6000 amp, so, I would not recommend the RG series, which I mentioned in the previous post. I would go for Kraft reference 250 stereo or mono (250W class A). IMHO, the best solid state amp except the Kraft reference 400(400W class A), which is not in production any more.
I heard the 400 monos in my friends system driving huge Matrix 800, and it was stunning. Even Ken Stevens of CAT acknoleges they have the best bass in the world.
By the way, his new JL-2 is unbelievable as well. I am talking about these big boys because you alreeady have a big one, and to upgrade, you might have to go to that level.
Please let me know if I can be of any help.

Poorguy,
I have no doubts that you are a REAL user of Sig 805s and that 300b makes them sing. I also tried single ended Audio Note amps on My Silver Signatures,( I also own Signature 30) but did not stay with them. They sure did make them sing, but didn't make them jam. They certanly work, I just don't think it's the best choice. In my opinion, and experience, B&Ws can be pushed hard and benefit from it. It's all about listening habbits. By the way, I visited Mr. Kondo in Tokyo last year and asked him if his low powered single ended amps are a good chioce for my Silver B&Ws. It would have been logical sinse he uses silver throughout. Well, he had reservations about it. 88-89db is not enough sensitivity. And they drop down to 4.6 ohm. Well, unless it's all mighty Ongaku(27W/ch), or new push-pull Gaku-o, which I heard and was ready to sell my house for it.....