Thank you guys for the advice. Truly helpful.
I will purchase the kef kc62 that has a high pass filter with the potential to utilise that later.
I will not purchase a dac at the moment but its something that has been on my list from the outset. The choice of the sub and dac could potentially affect one another and thats why i brought it up.
i checked your room floor plan again. by the looks of it you may have at least
30sqm of floor area in a very
irregular shaped room. you intend to buy a
single piece of KEF KC62 subwoofer to fill in an irregular shaped room with (hopefully) satisfying bass. i am not very sure how capable the KEF subs are and your reasons for buying them and that is your choice to make.
let me give you an idea of what
actual performance feels like. my dedicated home theater/stereo room is
rectangular and only 20.5sqm. i have
dual SVS SB1000s connected to a humble yamaha RXV-481 avr with revel M16 front stereo pair. the M16s on their own already have impressive bass running fullrange but can sound boomy depending on material. however, when avr bass management is enabled with the dual subs there is nothing i can play that will boom the room! seriously it is that good! the dual subs are also assymetrically and diagonally opposed near the front and rear corner of the room. i can set the sub gain to a higher value and i get louder and more importantly still clean bass due to proper integration thru the avr settings.
to give you more useful info, the dual SB1000s were previously in my
30sqm. master bedroom setup. while they were able to provide decent amounts of quality bass,
it was not the same when i only had a single SB1000. ergo the only way around it was dual subs! with dual subs you get decent output and more importantly a more even bass response. now my master bedroom has a single SVS PC2000 doing bass duties. this time even if was single sub it is still able to shake the room with decent conviction due to sheer output. you may want to look closely if the KEF sub can match or exceed the PC2000 output.
the takeaway from all this is already blocked and italicized above.
outlined below are your key considerations:
1. expect unpredictable bass response due to the irregular shaped room. a single sub will not do you any favors dealing with this dilemma.
2. you have 30sqm to fill with decent bass. depending on your preference, do you think the single KEF sub can deliver given the facts above??
3. you can never have too much subwoofer in any given room. it is always easier to crank it down than having it run full steam and still have inadequate bass.
4. there is no way around proper bass integration or bass management. YMMV if you choose to play it by ear or go the minidsp route.
5. if you had the hegel amp on the get go, perhaps you should have invested in larger floorstanders instead of the expectedly anemic KEF metas in a 30sqm room. might be worth swapping the KEFs for something more substantial if you still have the time. with larger floorstanders you may find some contentment without having to integrate subwoofers into the mix making for less clutter in the system.
HTH and cheers!
PS i checked the KEF KC62 at US$1599++ SRP. i think you can buy 3pcs of SB1000s for this amount and get on with your life in audio bliss!