If its under $400 and sounds good with your set up its probably ok. You never hear anyone talk about sony subs so that makes me uncomfortable. Just my opinion though. If you can get to the $500 level this opens up much better choices like SVS or HSU or even Klipsch.
you talkin in amercian funds? im talkin cdn, like 349 cdn or so. 350 cdn is the limit for right now, just built my theater, need a sub to go in it, later I will upgrade but for that kind of dough it should be fine don't you think?
My recommedation would be to NOT buy the sony now then upgrade later. take the money that you have for the sony and hold on to it. Save for a couple more months and buy the sub by the HSU or SVS.
IMHO spending money on a mediocre at best sub now and upgrading later just doesn't make a whole lot of sense. save your pennies and buy the more potent sub in a couple of months.
I have yet to see a review by anyone on the Dual 10" long throw push pull Sony 700. It's specs look promising, but we all know how that can go much of the time.
Considering it's digital (I belive) Amp power (200 or 250) and it's type design, it MAY be a decent budget sub. Can be had New with warranty on Ebay now and then for $198.00, and 25.00 to ship. It also carrys some impressive weight, especially considering it's smaller size, coming in at around 60-lbs naked.
It is always best to buy the highest quailty sub your money can afford, or better yet if one can wait, save to finally get what you really want! Be it what ever it may, HSU, Velo, SVS, Adire, ML, MK, Vander, James, Para, and on and on, your choice.
I do know what a "well designed and sourced" slot or ported/push pull design can do! Impressive, BUT this push pull is a Sony and I have yet to hear this sub or read from someone who has. With it's claimed weight to smaller size and amp power, it "could/may/may not" be a little budget sleeper. Till someone with at lest basic higher end quailty sub knowledge sees/hears one and writes something up, it's just another Sony sub at this point.
So somebody pick one up & check it out. Then measure some stuff in room, freq responce/extension/spl/room size/etc.
There's a Kit for $379 Cdn. It's the ezsub14 with a Shiva 12" woofer. You can find it in this link. http://www.creativesound.ca/index.html There's also a link from a fellow who built it and tells all. I just bought the Dayton 10" from Parts Express for $246 Cdn.including shipping and taxes. It should arrive this week.