Can one imagine a Tarkus with other 10 inch woofer instead of P830668. I admit! I do not like closed box as I prefer a deep profound bass sound from vented enclosures.
I have come acrooss the seas CA26REX4 and scanspeak 26W8534G00 woofers. Any suggestions please?
Although the Qts of the P830668 is more likely for closed box, the Tarkus is a vented box design.
As for other woofers, i used the Seas CA26RFX, which is close to the CA26RE4X but with much more xmax for the former. Quite good woofer.
I used a SS 26W/4558T00, which is different to the 8534G00, but the discussion on another thread revealed that their voice was quite similar, both subjectively slightly laid-back. Another option here is the 4534G00 with more sensitivity and slightly lower Qes/Qts than the 8 Ohm version.
But because the Tarkus is a modular design, you can choose a 12" woofer too if you want, imo.
I know that sound is a subjective issue, but according to you what sounds better to you in preference order between the Peerless 830668, the CA26RFX and the SS26W/4558? Unfortunately for me, choosing a 12 inch choice is looking for trouble at home!
The Kairos and Continuum are a similar concept - 2way monitor with bass box/stand with electrical crossover designs available. Loads of info on the two sub options for these in the following link plus closed, ported and passive radiator options for the SB29NRX.