Thinking of replacing PV1
Hi duaplex
If you're looking at up to £2k on a new sub woofer then (as has already been mentioned) i also feel that you should try JL Audio's Fathom f110. I've found Fathom sub woofers to be unfussy about room positioning (which is no doubt helped with their on board room Optimization - A.R.O). The Fathom gives deep, tight, weighty, fast, punchy and powerful pulsating waves of bass.
All the best
Rick @ Musicraft
Second person to mention this sub, it's worth investigating. Thanks Rick!
hi thanks in advance. i have kef r400d that's part of kef's new r series. it has a dual speakers. it sits on marble floorin beneath the cabinet but the space on sides is marginally 4 inches on either sided. im not feeling the effect of any low frequencies. will i get some inprovement if i place one of its speakers to face front and the other firing back against cabinet wall?
Because every room is acoustically different, I would say its worth a try. Best way Is trial and error, don't go by other peoples layout either.
Just checked - the ex-demo we have is the DXD12012, not the 808 
Thats the one for that price it's tough to resist!
That ones another ball game! As with the 808 punching above its weight, I'd pitch this against many more expensive subwoofers that are on the market at the moment. There aren't many manufacturers using dual 12" drivers, but there are some manufacturers charging up to £6k for this sort of arrangement, and even then it is just a straight dual 12", not a push/pull design.
Then it's settled, I am putting my PV1 up for sale
thank you duaplex. i will try. its heavy. with frequent pulling
out and in and moving to place in different positions will any damage occurs to sub?
Then it's settled, I am putting my PV1 up for sale
IMO. It is only worth changing for a good step up in performance.............so I think you are doing the right thing.
Then it's settled, I am putting my PV1 up for sale
IMO. It is only worth changing for a good step up in performance.............so I think you are doing the right thing.
As always I find myself in agreement with you CnoEvil Thank you for the vote of confidence!
thank you duaplex. i will try. its heavy. with frequent pulling
out and in and moving to place in different positions will any damage occurs to sub?
Of course not, unless you drop it 
Which you wont :)Remember with subs and any speaker in general a few centimeters (forward, back, right or left) can make a huge difference to the way it sounds. What im saying is, the movement does not need to be so dramatic, but give it a try, you may move it to one side of the room and find it works a treat. Your aim is to avoid any reflections and fine tune.
Just checked - the ex-demo we have is the DXD12012, not the 808
Thats the one
for that price it's tough to resist!
Panasonic 65" 3D TV (P65VT50), Pioneer LX83, CA, Azur 751BD, PS3, Water Cooled Xbox 360 (Modded), Nintendo Wii U, Sky HD+, i7 PC overclocked with 6850 HD Radeon, CM8 Fronts (Bi-Amped), CMC Center (Bi-Wired), DS3 Dipoles, PV1 Sub. Van Den Hul M.C. Snowtrack >Halogen Free< wiring, Chord Active Silver HDMI's, Cabridge Audio AUD700 Analogues Interconnects, QED Signature Subwoofer cables, Chunky Monkey custom oak AV cabinet.