I'm looking add a second sub as part of a home theater upgrade, and would like to get input on options, placement, and more. \n\nContext\nTo provide some background, I am based in the Philippines, so availability and pricing is vastly different from the US. I currently have a Yamaha RX-V375 5.1 channel amp, and am looking to move to a 9.2 channel amp. Most likely its going to be the Denon X3600H, with the backup option being the Marantz 6013 (Both having individual configuration for the subs). The planned speaker setup will be 5.2.4.My front towers are Polk Audio Signature S50's. Picked them up last year, and am very happy with them for 2 channel stereo. \n\nI currently have a 10 month old Polk Audio HTS12 sub-woofer. Have been quite happy with it.\nhttps:\/\/www.avsforum.com\/wordpress\/review-polk-hts12-12-ported-subwoofer-review\/\n\nSecond Sub\nInitially I was interested in trying out a different brand, but my reading all points towards matched subs, and avoiding subs with different characteristics. So I'm assuming I am restricted to adding another HTS12. Correct me if I am wrong please?\n\nA suggestion was to sell the HTS12 and get 2 new subs instead. I did consider SVS, but they are quite a bit more expensive. If it was just adding 1 to the existing setup it may have been doable; but 2 is biting off more than I can handle for now.\n\nAlso, prices in the Philippines are generally more than the US. Below are some options and prices in USD:\n\nSVS PB1000 - $800\nSVS PB2000 - $1250\nSVS PB3000 - $2150\nSVS PB4000 - $3200\nPolk Audio HTS12 - $550\nQ Acoustics - $800\nKlipsch R-120SW - $550\nKlipsch SPL-120 - $900\nKlipsch SPL-150 - $1100\n\nNote that with SVS sub's, stocks are also limited. \n\nLet me know of your thoughts and suggestions. \n\nPlacement:\nThe room is not a dedicated home theater room, rather a re-purposed living room. For the most part its 16.4 x 9.4 feet. It is separated from the dining area it opens out into by curtains.\n\nBelow is the existing room layout:\n\nI'm using a roof mounted projector\nFront Left and Right speakers are slightly off-axis, pointed towards the listening position\nSurround Left and Right are sadly a little behind the listening position (as they are wall mounted)\n\n\n\nBelow is a proposed room layout:\n\nExisting Sub 1 position has been changed\nSub 2 has been included\nAlso providing an option for Surround Left and Right (Let me know if this is better suited than the existing position)\nAnother option is to leave the Surround speakers as they currently are (first image above), and just move the Couch a little behind.\n\n\n\nThe sub positions are based on Gene's YouTube videos and guides for multi sub placement. For 2 subs the suggestion was the front center and rear center of the room; opposite each other. I cannot do exactly center, but this is the next closest thing. \n\n\nGo to the 5 min mark.