Tube vs Solid State

If you can't hear the difference, what's the difference?

"My suggestion is that you consider trying your existing amps in a passive vertical biamp configuration...."

Al, thank you for your feedback. I have already tried this, while I gain bit of better separation in mid’s and high’s, the bottom falls out a bit. The low bass frequencies are not a weighty as they are when I run the amp in bridge mode.

Secondly, the LS36.5 is configured with dual balanced outputs in parallel to accommodate bi-amping or a sub with balanced inputs.

@ct0517, I have tried all the options you suggested.

My room is fairly treated and power issues has been addressed with a pair of Audience aR6-TSSOX for digital and analog components.

It seems from rest of the feedback that KWA150SE may not be the ideal choice for 800’s. I am looking into a pair of Class D 1000W / 8 ohm amps to handle low bass frequencies. Add a electronic analog crossover to split bass and mid/high frequencies between class D and tube amps.

I hear Pass Labs SVR1 and Marchand tube or SS are among the best crossovers out there.

Thank you all for your feedback.

"My suggestion is that you consider trying your existing amps in a passive vertical biamp configuration...."

Al, thank you for your feedback. I have already tried this, while I gain bit of better separation in mid’s and high’s, the bottom falls out a bit. The low bass frequencies are not a weighty as they are when I run the amp in bridge mode.

Secondly, the LS36.5 is configured with dual balanced outputs in parallel to accommodate bi-amping or a sub with balanced inputs.

If both of the "dual balanced outputs in parallel" are driven from the same output stage within the line stage, as seems very likely, the lack of bass weight in the vertical biamp configuration could very possibly be due to the impedance compatibility concern that I cited earlier. You may want to discuss that with Dan.

If he confirms that both of the output connectors provided for each channel are driven by the same output stage, and if he indicates that the output impedance of the line stage rises significantly at deep bass frequencies (as is very common with tube line stages and preamps), you may want to consider inserting some sort of a buffer stage between the line stage and the amps, that would provide high input impedance and low output impedance, and re-trying the vertical biamp configuration.

Regards,
-- Al

Have you heard the speakers in another system that did what you seek? What were they using to drive them? 

Have you tried any hybrid amps that will offer the control of SS output stages and maybe a bit more warmth on the top & mids?

I'd be cautious of the biamp route due to complexity described already by others. Either amps or speakers will probably need to change. Sounds like you've tried more tweaks than most would. Cheers,
Spencer

Thanks Al, i will speak to Dan soon and chime back in soon. 

Spencer, great feedback.  I have heard 800's with McIntosh and Classe and to my ears, McIntosh matched very nicely with 800's. I would love to try Aesthetix Atlas mono's but they are bit out of my budget. 

I am not parting with 800's anytime soon :-)
So I will continue to explore Amp/Preamp options.