Tekton Double Impacts

@kdude66
Kenny, I was interested in the reworking of your DI's.  In particular how you changed your woofers from the alphas to the betas.  On paper these are two different drivers.  I could see how the betas with their larger magnets might offer slightly more efficiency and tighter bass, but at the expense  of low end extension. The betas do have a slightly higher Fs as expected.
On a somewhat related note, how do these drivers achieve such low end extension when their resonant frequencies are in the low 50's?? They obviously extend well beyond that but I always read that Fs defines the low end extension and even in a reflex enclosure this seems way deeper than I would expect.  Any thoughts?

Stfoth,
I didn’t bother with any tube power amplifier suggestions as it seems clear that there’s only an interest in transistors. The "cold and clinical " character you mentioned (Emotiva) is why I recommended the First Watt amplifiers. Probably as natural and lively as you’ll find for solid state, particularly for the stated price range. Howeve It’s hard to know what another person may like.
Charles

Great info group. Thanks! I have much research to do.
It will be 50/50 Audio/HT. I am considering the new Outlaw Atmos preamp that is suppose to be available this year. I also looked at the Emotiva XMC-1 but have heard they've had troubles with some of their offerings. Marantz 7703 or maybe a used/refurbed 8802 are under consideration too but the  Outlaw seems to have a good reputation and they are stating a target of $1200 for their Atmos pre/pro so that seems attractive.
Sources are an Oppo 103 for BR, (will go with a 203 in the future) An HTPC FLAC lossless through an IFI Micro DSD DAC for digital music and a Thorens TD-165 with an AT-440. for analog.
And here is the TMI paragraph if you would like to know more about my situation. My HT rack is in the rear of the room  My speaker cables to the DIs presently are over 60ft! I want to put the amp for the DIs in the front with them and feed it with balanced cables from the Pre/Pro to shorten the speaker cables to only 6ft. So I want a 2 (or 3 for center) channel amp in the front and the remainder in the back with the pre-pro. So I can't just have a single 7 or 11 (atmos) channel amp in the rear. That complicates things for me. I need to sort through some of these suggestions. The answer may be there. With Emotiva's XPA G3 amp, I feel like I'm wasting a lot only putting two power cards in that chassis designed for 7. Maybe that's just a quirk for me though. Are Marantz amps or pre/pros worth a darn?  Or are they just in the same class as my current Denon sonically? Thanks again for suggestions.

The best SS amps I have heard on the DI's have been Pass Labs XA-60.8 mono-blocks, Accuphase P-450 (this was my favorite driven by the Micro-ZOTL), First Watt SIT-2, and Perla Audio's Sig-50.  All of these are wonderful SS amps which present somewhat tube like in their color/tone and are slightly warm with great liquidity.  If still say I would not like to hear the DI's with less worthy SS gear because you would hear the "rough edges" very easily through these speakers.